diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 0868300..d8ac70b 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -10,8 +10,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      
+
       - name: Build and Publish to PyPi
         uses: JRubics/poetry-publish@v1.10
         with:
-          pypi_token: ${{ secrets.PYPI_TOKEN }}
\ No newline at end of file
+          pypi_token: ${{ secrets.PYPI_TOKEN }}
+          extra_build_dependency_packages: "graphviz"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c40e9d4..1577053 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,81 +12,31 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v3
-          
+
       - name: Switch to Current Branch
         run: git checkout ${{ env.BRANCH }}
-              
+
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y graphviz
+
+      - name: Validate Test Files
+        run: |
+          docker compose -f tests/ymls/builds/docker-compose.yml config -q
+          docker compose -f tests/ymls/depends_on/docker-compose.yml config -q
+          docker compose -f tests/ymls/extends/docker-compose.yml config -q
+          docker compose -f tests/ymls/links/docker-compose.yml config -q
+          docker compose -f tests/ymls/networks/docker-compose.yml config -q
+          docker compose -f tests/ymls/ports/docker-compose.yml config -q
+          docker compose -f tests/ymls/volumes/docker-compose.yml config -q
+          docker compose -f examples/full-stack-node-app/docker-compose.yml config -q
+          docker compose -f examples/non-normative/docker-compose.yml config -q
+
       - name: Setup Python 3.10.4
         uses: actions/setup-python@v3
         with:
           python-version: '3.10.4'
-      
-      - name: Validate Test Files
-        run: |
-          docker-compose -f tests/in/000001.yaml config -q
-          docker-compose -f tests/in/000010.yaml config -q
-          docker-compose -f tests/in/000011.yaml config -q
-          docker-compose -f tests/in/000100.yaml config -q
-          docker-compose -f tests/in/000101.yaml config -q
-          docker-compose -f tests/in/000110.yaml config -q
-          docker-compose -f tests/in/000111.yaml config -q
-          docker-compose -f tests/in/001000.yaml config -q
-          docker-compose -f tests/in/001001.yaml config -q
-          docker-compose -f tests/in/001010.yaml config -q
-          docker-compose -f tests/in/001011.yaml config -q
-          docker-compose -f tests/in/001100.yaml config -q
-          docker-compose -f tests/in/001101.yaml config -q
-          docker-compose -f tests/in/001110.yaml config -q
-          docker-compose -f tests/in/001111.yaml config -q
-          docker-compose -f tests/in/010000.yaml config -q
-          docker-compose -f tests/in/010001.yaml config -q
-          docker-compose -f tests/in/010010.yaml config -q
-          docker-compose -f tests/in/010011.yaml config -q
-          docker-compose -f tests/in/010100.yaml config -q
-          docker-compose -f tests/in/010101.yaml config -q
-          docker-compose -f tests/in/010110.yaml config -q
-          docker-compose -f tests/in/010111.yaml config -q
-          docker-compose -f tests/in/011000.yaml config -q
-          docker-compose -f tests/in/011001.yaml config -q
-          docker-compose -f tests/in/011010.yaml config -q
-          docker-compose -f tests/in/011011.yaml config -q
-          docker-compose -f tests/in/011100.yaml config -q
-          docker-compose -f tests/in/011101.yaml config -q
-          docker-compose -f tests/in/011110.yaml config -q
-          docker-compose -f tests/in/011111.yaml config -q
-          docker-compose -f tests/in/100000.yaml config -q
-          docker-compose -f tests/in/100001.yaml config -q
-          docker-compose -f tests/in/100010.yaml config -q
-          docker-compose -f tests/in/100011.yaml config -q
-          docker-compose -f tests/in/100100.yaml config -q
-          docker-compose -f tests/in/100101.yaml config -q
-          docker-compose -f tests/in/100110.yaml config -q
-          docker-compose -f tests/in/100111.yaml config -q
-          docker-compose -f tests/in/101000.yaml config -q
-          docker-compose -f tests/in/101001.yaml config -q
-          docker-compose -f tests/in/101010.yaml config -q
-          docker-compose -f tests/in/101011.yaml config -q
-          docker-compose -f tests/in/101100.yaml config -q
-          docker-compose -f tests/in/101101.yaml config -q
-          docker-compose -f tests/in/101110.yaml config -q
-          docker-compose -f tests/in/101111.yaml config -q
-          docker-compose -f tests/in/110000.yaml config -q
-          docker-compose -f tests/in/110001.yaml config -q
-          docker-compose -f tests/in/110010.yaml config -q
-          docker-compose -f tests/in/110011.yaml config -q
-          docker-compose -f tests/in/110100.yaml config -q
-          docker-compose -f tests/in/110101.yaml config -q
-          docker-compose -f tests/in/110110.yaml config -q
-          docker-compose -f tests/in/110111.yaml config -q
-          docker-compose -f tests/in/111000.yaml config -q
-          docker-compose -f tests/in/111001.yaml config -q
-          docker-compose -f tests/in/111010.yaml config -q
-          docker-compose -f tests/in/111011.yaml config -q
-          docker-compose -f tests/in/111100.yaml config -q
-          docker-compose -f tests/in/111101.yaml config -q
-          docker-compose -f tests/in/111110.yaml config -q
-          docker-compose -f tests/in/111111.yaml config -q
-                  
+
       - name: Setup Poetry
         uses: Gr1N/setup-poetry@v7
         with:
@@ -96,6 +46,10 @@ jobs:
         run: |
           poetry install --no-root
 
-      - name: Validate Custom Input File
+      - name: Execute pre-commit
         run: |
-          poetry run python -m pytest
+          poetry run python -m pre_commit run --all-files --show-diff-on-failure
+
+      - name: Run Pytest
+        run: |
+          poetry run python -m pytest --cov=compose_viz tests/ --tb=short
diff --git a/.github/workflows/release-tagged-version.yml b/.github/workflows/release-tagged-version.yml
index 3c6d547..f2ce249 100644
--- a/.github/workflows/release-tagged-version.yml
+++ b/.github/workflows/release-tagged-version.yml
@@ -18,15 +18,19 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v3
-          
+
       - name: Switch to Current Branch
         run: git checkout ${{ env.BRANCH }}
-              
+
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y graphviz
+
       - name: Setup Python 3.10.4
         uses: actions/setup-python@v3
         with:
           python-version: '3.10.4'
-      
+
       - name: Setup Poetry
         uses: Gr1N/setup-poetry@v7
         with:
@@ -34,7 +38,7 @@ jobs:
       - run: |
           poetry install --no-root
           poetry build
-      
+
       - name: "Release Tagged Version"
         uses: "marvinpinto/action-automatic-releases@latest"
         with:
@@ -42,4 +46,4 @@ jobs:
           prerelease: false
           files: |
             LICENSE
-            dist/**
\ No newline at end of file
+            dist/**
diff --git a/.gitignore b/.gitignore
index fa94aa8..1fdfab5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -158,4 +158,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
\ No newline at end of file
+#.idea/
+
+*.png
+!examples/**/*.png
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..9b26d29
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,38 @@
+exclude: |
+    (?x)^(
+        README.md|
+        LICENSE|
+        tests/ymls/others/
+    )
+repos:
+    - repo: https://github.com/pre-commit/pre-commit-hooks
+      rev: v4.2.0
+      hooks:
+        - id: check-yaml
+        - id: end-of-file-fixer
+        - id: trailing-whitespace
+    - repo: https://github.com/pycqa/flake8
+      rev: 4.0.1
+      hooks:
+        - id: flake8
+          args:
+            - "--max-line-length=120"
+    - repo: https://github.com/pycqa/isort
+      rev: 5.10.1
+      hooks:
+        - id: isort
+    - repo: https://github.com/psf/black
+      rev: 22.3.0
+      hooks:
+        - id: black
+          args: # arguments to configure black
+            - --line-length=120
+    - repo: local
+      hooks:
+        - id: pyright
+          name: pyright
+          entry: pyright
+          language: node
+          pass_filenames: false
+          types: [python]
+          additional_dependencies: ['pyright@1.1.247']
diff --git a/README.md b/README.md
index 060e486..e09d13d 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,8 @@
     <li>
       <a href="#getting-started">Getting Started</a>
       <ul>
+        <li><a href="#prerequisities">Prerequisities</a></li>
+        <li><a href="#installation">Installation</a></li>
         <li><a href="#usage">Usage</a></li>
         <li><a href="#options">Options</a></li>
         <li><a href="#example">Example</a></li>
@@ -54,7 +56,9 @@
 
 ## About The Project
 
-`compose-viz` is a [docker-compose](https://github.com/docker/compose)/[podman-compose](https://github.com/containers/podman-compose) graph visualization tool that allows you to gernerate graph in [DOT](https://graphviz.org/doc/info/lang.html) format or `.png`.
+`compose-viz` is a compose file visualization tool that supports [compose-spec](https://github.com/compose-spec/compose-spec/blob/master/spec.md) and allows you to gernerate graph in [DOT](https://graphviz.org/doc/info/lang.html) format or `.png`.
+
+If you are looking for a compose file vizualization tool, and you are using one of the [compose-spec](https://github.com/compose-spec/compose-spec/blob/master/spec.md) implementations (e.g. [docker-compose](https://github.com/docker/compose)/[podman-compose](https://github.com/containers/podman-compose)), then `compose-viz` is a great choice for you. 
 
 <p align="right">(<a href="#top">back to top</a>)</p>
 
@@ -62,20 +66,40 @@
 
 ## Getting Started
 
+### Prerequisities
+
+#### Graphviz
+
+If you want to generate PNG (which is the default option), you need to install [Graphviz](https://graphviz.org/download/).
+
+### Installation
+
+#### Using `pip`
+
+`pip install compose-viz`
+
+#### Using `.whl`
+
+See [releases](https://github.com/compose-viz/compose-viz/releases).
+
 ### Usage
 
-`python3 compose-viz.py [OPTIONS] [input-file]`
+`cpv [OPTIONS] INPUT_PATH`
 
 ### Options
 
-| Option                        | Necessity | Description       | Default Value   |
-| ----------------------------- | --------- | ----------------- | --------------- |
-| `-o --output-file`            | Optional  | Output file path. | `./compose.png` |
-| `-m --output-format=DOT, PNG` | Optional  | Output format.    | PNG             |
+| Option                   | Description                                                                    |
+| ------------------------ | ------------------------------------------------------------------------------ |
+| `-o, --output-path`      | Output path for the generated visualization file. [default: ./compose-viz.png] |
+| `-m, --format [PNG,DOT]` | Output format for the generated visualization file. [default: PNG]             |
+| `-v, --version`          | Show the version of compose-viz.                                               |
+| `--help`                 | Show help and exit.                                                            |
 
 ### Example
 
-`python3 compose-viz.py docker-compose.yaml`
+`cpv -o .\examples\full-stack-node-app\compose-viz.png .\examples\full-stack-node-app\docker-compose.yml`
+
+[Here](https://github.com/compose-viz/compose-viz/blob/main/examples/full-stack-node-app/compose-viz.png) is the result.
 
 <p align="right">(<a href="#top">back to top</a>)</p>
 
@@ -83,7 +107,7 @@
 
 ## Roadmap
 
-- [ ] Support [podman-compose](https://github.com/containers/podman-compose).
+- [ ] Support more vizualization components.
 
 See the [open issues](https://github.com/compose-viz/compose-viz/issues)
 for a full list of proposed features (and known issues).
diff --git a/compose_viz/__main__.py b/compose_viz/__main__.py
index 4065f3b..8ade738 100644
--- a/compose_viz/__main__.py
+++ b/compose_viz/__main__.py
@@ -1,5 +1,4 @@
 from compose_viz.cli import start_cli
 
-
 if __name__ == "__main__":
     start_cli()
diff --git a/compose_viz/cli.py b/compose_viz/cli.py
index d2bf1d3..e028d70 100644
--- a/compose_viz/cli.py
+++ b/compose_viz/cli.py
@@ -1,7 +1,10 @@
 from enum import Enum
-import typer
 from typing import Optional
+
+import typer
+
 from compose_viz import __app_name__, __version__
+from compose_viz.graph import Graph
 from compose_viz.parser import Parser
 
 
@@ -27,26 +30,26 @@ def _version_callback(value: bool) -> None:
 @app.callback()
 def compose_viz(
     input_path: str,
-    output_path: Optional[str] = typer.Option(
-        None,
-        "--output_path",
+    output_path: str = typer.Option(
+        "./compose-viz.png",
+        "--output-path",
         "-o",
-        help="Output path for the generated visualization.",
+        help="Output path for the generated visualization file.",
     ),
     format: VisualizationFormats = typer.Option(
         "PNG",
         "--format",
         "-m",
-        help="Output format for the generated visualization.",
+        help="Output format for the generated visualization file.",
     ),
     _: Optional[bool] = typer.Option(
         None,
         "--version",
         "-v",
-        help="Show the version of compose_viz.",
+        help="Show the version of compose-viz.",
         callback=_version_callback,
         is_eager=True,
-    )
+    ),
 ) -> None:
     parser = Parser()
     compose = parser.parse(input_path)
@@ -54,8 +57,10 @@ def compose_viz(
     if compose:
         typer.echo(f"Successfully parsed {input_path}")
 
+    Graph(compose, output_path).render(format)
+
     raise typer.Exit()
 
 
 def start_cli() -> None:
-    app(prog_name=__app_name__)
+    app(prog_name="cpv")
diff --git a/compose_viz/compose.py b/compose_viz/compose.py
index 6c65a8a..03e8f74 100644
--- a/compose_viz/compose.py
+++ b/compose_viz/compose.py
@@ -1,10 +1,12 @@
 from typing import List
+
 from compose_viz.service import Service
 
 
 class Compose:
     def __init__(self, services: List[Service]) -> None:
-        self.services = services
+        self._services = services
 
-    def extract_networks(self) -> List[str]:
-        raise NotImplementedError
+    @property
+    def services(self):
+        return self._services
diff --git a/compose_viz/extends.py b/compose_viz/extends.py
new file mode 100644
index 0000000..9948aa0
--- /dev/null
+++ b/compose_viz/extends.py
@@ -0,0 +1,15 @@
+from typing import Optional
+
+
+class Extends:
+    def __init__(self, service_name: str, from_file: Optional[str] = None):
+        self._service_name = service_name
+        self._from_file = from_file
+
+    @property
+    def service_name(self):
+        return self._service_name
+
+    @property
+    def from_file(self):
+        return self._from_file
diff --git a/compose_viz/graph.py b/compose_viz/graph.py
new file mode 100644
index 0000000..15516ca
--- /dev/null
+++ b/compose_viz/graph.py
@@ -0,0 +1,92 @@
+from typing import Optional
+
+import graphviz
+
+from compose_viz.compose import Compose
+
+
+def apply_vertex_style(type) -> dict:
+    style = {
+        "service": {
+            "shape": "component",
+        },
+        "volume": {
+            "shape": "folder",
+        },
+        "network": {
+            "shape": "pentagon",
+        },
+        "port": {
+            "shape": "circle",
+        },
+    }
+
+    return style[type]
+
+
+def apply_edge_style(type) -> dict:
+    style = {
+        "ports": {
+            "style": "solid",
+            "dir": "both",
+        },
+        "links": {
+            "style": "solid",
+        },
+        "volumes": {
+            "style": "dashed",
+            "dir": "both",
+        },
+        "depends_on": {
+            "style": "dotted",
+        },
+        "extends": {
+            "dir": "both",
+            "arrowhead": "inv",
+            "arrowtail": "dot",
+        },
+    }
+
+    return style[type]
+
+
+class Graph:
+    def __init__(self, compose: Compose, filename: str) -> None:
+        self.dot = graphviz.Digraph()
+        self.dot.attr("graph", background="#ffffff", pad="0.5", ratio="fill")
+        self.compose = compose
+        self.filename = filename
+
+    def validate_name(self, name: str) -> str:
+        # graphviz does not allow ':' in node name
+        transTable = name.maketrans({":": ""})
+        return name.translate(transTable)
+
+    def add_vertex(self, name: str, type: str, lable: Optional[str] = None) -> None:
+        self.dot.node(self.validate_name(name), lable, **apply_vertex_style(type))
+
+    def add_edge(self, head: str, tail: str, type: str, lable: Optional[str] = None) -> None:
+        self.dot.edge(self.validate_name(head), self.validate_name(tail), lable, **apply_edge_style(type))
+
+    def render(self, format: str, cleanup: bool = True) -> None:
+        for service in self.compose.services:
+            if service.image is not None:
+                self.add_vertex(service.name, "service", lable=f"{service.name}\n({service.image})")
+            if service.extends is not None:
+                self.add_vertex(service.name, "service", lable=f"{service.name}\n")
+                self.add_edge(service.extends.service_name, service.name, "extends")
+            for network in service.networks:
+                self.add_vertex(network, "network", lable=f"net:{network}")
+                self.add_edge(service.name, network, "links")
+            for volume in service.volumes:
+                self.add_vertex(volume.source, "volume")
+                self.add_edge(service.name, volume.source, "volumes", lable=volume.target)
+            for port in service.ports:
+                self.add_vertex(port.host_port, "port", lable=port.host_port)
+                self.add_edge(port.host_port, service.name, "ports", lable=port.container_port)
+            for link in service.links:
+                self.add_edge(link.split(":")[0], service.name, "links", link.split(":")[1])
+            for depends_on in service.depends_on:
+                self.add_edge(service.name, depends_on, "depends_on")
+
+        self.dot.render(outfile=self.filename, format=format, cleanup=cleanup)
diff --git a/compose_viz/parser.py b/compose_viz/parser.py
index 1f44bbc..757d3ed 100644
--- a/compose_viz/parser.py
+++ b/compose_viz/parser.py
@@ -1,4 +1,12 @@
-from compose_viz.compose import Compose
+import re
+from typing import Dict, List, Optional
+
+from ruamel.yaml import YAML
+
+from compose_viz.compose import Compose, Service
+from compose_viz.extends import Extends
+from compose_viz.port import Port, Protocol
+from compose_viz.volume import Volume, VolumeType
 
 
 class Parser:
@@ -6,5 +14,216 @@ class Parser:
         pass
 
     def parse(self, file_path: str) -> Compose:
-        # validate input file using `docker-compose config -q sys.argv[1]` first
-        raise NotImplementedError
+        # load the yaml file
+        with open(file_path, "r") as f:
+            try:
+                yaml = YAML(typ="safe", pure=True)
+                yaml_data = yaml.load(f)
+            except Exception as e:
+                raise RuntimeError(f"Error parsing file '{file_path}': {e}")
+        # validate the yaml file
+        if not yaml_data:
+            raise RuntimeError("Empty yaml file, aborting.")
+        if not yaml_data.get("services"):
+            raise RuntimeError("No services found, aborting.")
+
+        # parse services data into Service objects
+        services = self.parse_service_data(yaml_data["services"])
+
+        # create Compose object
+        compose = Compose(services)
+
+        return compose
+
+    def parse_service_data(self, services_yaml_data: Dict[str, dict]) -> List[Service]:
+        services: List[Service] = []
+        for service, service_name in zip(services_yaml_data.values(), services_yaml_data.keys()):
+
+            service_image: Optional[str] = None
+            if service.get("build"):
+                if type(service["build"]) is str:
+                    service_image = f"build from '{service['build']}'"
+                elif type(service["build"]) is dict:
+                    if service["build"].get("context") and service["build"].get("dockerfile"):
+                        service_image = (
+                            f"build from '{service['build']['context']}' using '{service['build']['dockerfile']}'"
+                        )
+                    elif service["build"].get("context"):
+                        service_image = f"build from '{service['build']['context']}'"
+            if service.get("image"):
+                if service_image:
+                    service_image += ", image: " + service["image"]
+                else:
+                    service_image = service["image"]
+
+            service_networks: List[str] = []
+            if service.get("networks"):
+                if type(service["networks"]) is list:
+                    service_networks = service["networks"]
+                elif type(service["networks"]) is dict:
+                    service_networks = list(service["networks"].keys())
+
+            service_extends: Optional[Extends] = None
+            if service.get("extends"):
+                assert type(service["extends"]) is dict, "Invalid extends format, aborting."
+                assert service["extends"]["service"], "Missing extends service, aborting."
+                extend_service_name = str(service["extends"]["service"])
+
+                extend_from_file: Optional[str] = None
+                if service["extends"].get("file"):
+                    assert service["extends"]["file"], "Missing extends file, aborting."
+                    extend_from_file = str(service["extends"]["file"])
+
+                service_extends = Extends(service_name=extend_service_name, from_file=extend_from_file)
+
+            service_ports: List[Port] = []
+            if service.get("ports"):
+                assert type(service["ports"]) is list
+                for port_data in service["ports"]:
+                    if type(port_data) is dict:
+                        # define a nested function to limit variable scope
+                        def long_syntax():
+                            assert type(port_data) is dict
+                            assert port_data["target"]
+
+                            container_port: str = str(port_data["target"])
+                            host_port: str = ""
+                            protocol: Protocol = Protocol.any
+
+                            if port_data.get("published"):
+                                host_port = str(port_data["published"])
+                            else:
+                                host_port = container_port
+
+                            if port_data.get("host_ip"):
+                                host_ip = str(port_data["host_ip"])
+                                host_port = f"{host_ip}:{host_port}"
+                            else:
+                                host_port = f"0.0.0.0:{host_port}"
+
+                            if port_data.get("protocol"):
+                                protocol = Protocol[str(port_data["protocol"])]
+
+                            assert host_port, "Error parsing port, aborting."
+
+                            service_ports.append(
+                                Port(
+                                    host_port=host_port,
+                                    container_port=container_port,
+                                    protocol=protocol,
+                                )
+                            )
+
+                        long_syntax()
+                    elif type(port_data) is str:
+                        # ports that needs to parse using regex:
+                        #     - "3000"
+                        #     - "3000-3005"
+                        #     - "8000:8000"
+                        #     - "9090-9091:8080-8081"
+                        #     - "49100:22"
+                        #     - "127.0.0.1:8001:8001"
+                        #     - "127.0.0.1:5000-5010:5000-5010"
+                        #     - "6060:6060/udp"
+
+                        def short_syntax():
+                            assert type(port_data) is str
+                            regex = r"(?P<host_ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}:)?((?P<host_port>\d+(\-\d+)?):)?((?P<container_port>\d+(\-\d+)?))?(/(?P<protocol>\w+))?"  # noqa: E501
+                            match = re.match(regex, port_data)
+                            if match:
+                                host_ip: Optional[str] = match.group("host_ip")
+                                host_port: Optional[str] = match.group("host_port")
+                                container_port: Optional[str] = match.group("container_port")
+                                protocol: Optional[str] = match.group("protocol")
+
+                                assert container_port, "Invalid port format, aborting."
+
+                                if container_port and not host_port:
+                                    host_port = container_port
+
+                                if host_ip:
+                                    host_port = f"{host_ip}{host_port}"
+                                else:
+                                    host_port = f"0.0.0.0:{host_port}"
+
+                                assert host_port, "Error while parsing port, aborting."
+
+                                if protocol:
+                                    service_ports.append(
+                                        Port(
+                                            host_port=host_port,
+                                            container_port=container_port,
+                                            protocol=Protocol[protocol],
+                                        )
+                                    )
+                                else:
+                                    service_ports.append(
+                                        Port(
+                                            host_port=host_port,
+                                            container_port=container_port,
+                                        )
+                                    )
+
+                        short_syntax()
+
+            service_depends_on: List[str] = []
+            if service.get("depends_on"):
+                if type(service["depends_on"]) is list:
+                    for depends_on in service["depends_on"]:
+                        service_depends_on.append(str(depends_on))
+                elif type(service["depends_on"]) is dict:
+                    service_depends_on = list(service["depends_on"].keys())
+
+            service_volumes: List[Volume] = []
+            if service.get("volumes"):
+                assert type(service["volumes"]) is list
+                for volume_data in service["volumes"]:
+                    if type(volume_data) is dict:
+                        assert volume_data["source"] and volume_data["target"], "Invalid volume input, aborting."
+
+                        volume_source: str = str(volume_data["source"])
+                        volume_target: str = str(volume_data["target"])
+                        volume_type: VolumeType = VolumeType.volume
+
+                        if volume_data.get("type"):
+                            volume_type = VolumeType[str(volume_data["type"])]
+
+                        service_volumes.append(Volume(source=volume_source, target=volume_target, type=volume_type))
+                    elif type(volume_data) is str:
+                        assert ":" in volume_data, "Invalid volume input, aborting."
+
+                        spilt_data = volume_data.split(":")
+                        if len(spilt_data) == 2:
+                            service_volumes.append(Volume(source=spilt_data[0], target=spilt_data[1]))
+                        elif len(spilt_data) == 3:
+                            service_volumes.append(
+                                Volume(source=spilt_data[0], target=spilt_data[1], access_mode=spilt_data[2])
+                            )
+
+            service_links: List[str] = []
+            if service.get("links"):
+                service_links = service["links"]
+
+            services.append(
+                Service(
+                    name=service_name,
+                    image=service_image,
+                    networks=service_networks,
+                    extends=service_extends,
+                    ports=service_ports,
+                    depends_on=service_depends_on,
+                    volumes=service_volumes,
+                    links=service_links,
+                )
+            )
+            # Service print debug
+            # print("--------------------")
+            # print("Service name: {}".format(service_name))
+            # print("image: {}".format(service_image))
+            # print("networks: {}".format(service_networks))
+            # print("image: {}".format(service_image))
+            # print("extends: {}".format(service_extends))
+            # print("ports: {}".format(service_ports))
+            # print("depends: {}".format(service_depends_on))
+
+        return services
diff --git a/compose_viz/port.py b/compose_viz/port.py
new file mode 100644
index 0000000..d64fb5c
--- /dev/null
+++ b/compose_viz/port.py
@@ -0,0 +1,26 @@
+from enum import Enum
+
+
+class Protocol(str, Enum):
+    tcp = "tcp"
+    udp = "udp"
+    any = "any"
+
+
+class Port:
+    def __init__(self, host_port: str, container_port: str, protocol: Protocol = Protocol.any):
+        self._host_port = host_port
+        self._container_port = container_port
+        self._protocol = protocol
+
+    @property
+    def host_port(self):
+        return self._host_port
+
+    @property
+    def container_port(self):
+        return self._container_port
+
+    @property
+    def protocol(self):
+        return self._protocol
diff --git a/compose_viz/service.py b/compose_viz/service.py
index 6e42483..b1bf84b 100644
--- a/compose_viz/service.py
+++ b/compose_viz/service.py
@@ -1,13 +1,59 @@
-from typing import List
+from typing import List, Optional
+
+from compose_viz.extends import Extends
+from compose_viz.port import Port
+from compose_viz.volume import Volume
 
 
 class Service:
-    def __init__(self, name: str, image: str, ports: List[str] = [], networks: List[str] = [], volumes: List[str] = [], depends_on: List[str] = [], links: List[str] = [], extends: List[str] = []) -> None:
-        self.name = name
-        self.image = image
-        self.ports = ports
-        self.networks = networks
-        self.volumes = volumes
-        self.depends_on = depends_on
-        self.links = links
-        self.extends = extends
+    def __init__(
+        self,
+        name: str,
+        image: Optional[str] = None,
+        ports: List[Port] = [],
+        networks: List[str] = [],
+        volumes: List[Volume] = [],
+        depends_on: List[str] = [],
+        links: List[str] = [],
+        extends: Optional[Extends] = None,
+    ) -> None:
+        self._name = name
+        self._image = image
+        self._ports = ports
+        self._networks = networks
+        self._volumes = volumes
+        self._depends_on = depends_on
+        self._links = links
+        self._extends = extends
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def image(self):
+        return self._image
+
+    @property
+    def ports(self):
+        return self._ports
+
+    @property
+    def networks(self):
+        return self._networks
+
+    @property
+    def volumes(self):
+        return self._volumes
+
+    @property
+    def depends_on(self):
+        return self._depends_on
+
+    @property
+    def links(self):
+        return self._links
+
+    @property
+    def extends(self):
+        return self._extends
diff --git a/compose_viz/volume.py b/compose_viz/volume.py
new file mode 100644
index 0000000..192ed97
--- /dev/null
+++ b/compose_viz/volume.py
@@ -0,0 +1,32 @@
+from enum import Enum
+
+
+class VolumeType(str, Enum):
+    volume = "volume"
+    bind = "bind"
+    tmpfs = "tmpfs"
+    npipe = "npipe"
+
+
+class Volume:
+    def __init__(self, source: str, target: str, type: VolumeType = VolumeType.volume, access_mode: str = "rw"):
+        self._source = source
+        self._target = target
+        self._type = type
+        self._access_mode = access_mode
+
+    @property
+    def source(self):
+        return self._source
+
+    @property
+    def target(self):
+        return self._target
+
+    @property
+    def type(self):
+        return self._type
+
+    @property
+    def access_mode(self):
+        return self._access_mode
diff --git a/examples/full-stack-node-app/compose-viz.png b/examples/full-stack-node-app/compose-viz.png
new file mode 100644
index 0000000..1b0976b
Binary files /dev/null and b/examples/full-stack-node-app/compose-viz.png differ
diff --git a/examples/full-stack-node-app/docker-compose.yml b/examples/full-stack-node-app/docker-compose.yml
new file mode 100644
index 0000000..b21887f
--- /dev/null
+++ b/examples/full-stack-node-app/docker-compose.yml
@@ -0,0 +1,87 @@
+version: "3.9"
+
+services:
+  node:
+    build:
+      context: .
+      dockerfile: Dockerfile.node
+
+  api:
+    image: "awesome/api"
+    extends:
+      service: node
+    build:
+      args:
+        PACKAGE_PATH: api
+        WORKING_DIR: /usr/src/
+    expose:
+      - 8000
+    ports:
+      - 8000:8000
+    environment:
+      - NODE_ENV=development
+    volumes:
+      - ./api:/usr/src
+    depends_on:
+      - db
+      - adminer
+      - redis
+    networks:
+      - front-tier
+      - back-tier
+    command: ["npm", "start"]
+
+  frontend:
+    extends:
+      service: node
+    build:
+      args:
+        PACKAGE_PATH: frontend
+        WORKING_DIR: /usr/src/
+    expose:
+      - 3000
+    ports:
+      - 3000:3000
+    volumes:
+      - ./frontend:/usr/src
+    depends_on:
+      - api
+    networks:
+      - front-tier
+    command: ["npm", "start"]
+
+  db:
+    image: "awesome/db"
+    extends:
+      service: postgres
+      file: postgres.yml
+    restart: always
+    networks:
+      - back-tier
+    volumes:
+      - "db-data:/data"
+      - type: bind
+        source: /var/run/postgres/postgres.sock
+        target: /var/run/postgres/postgres.sock
+
+  redis:
+    image: "awesome/redis"
+    restart: always
+    networks:
+      - back-tier
+    expose:
+      - 6379
+
+  adminer:
+    image: "awesome/adminer"
+    networks:
+      - back-tier
+    ports:
+      - 8080:8080
+
+volumes:
+  db-data:
+
+networks:
+  front-tier:
+  back-tier:
diff --git a/examples/full-stack-node-app/postgres.yml b/examples/full-stack-node-app/postgres.yml
new file mode 100644
index 0000000..cb6c45e
--- /dev/null
+++ b/examples/full-stack-node-app/postgres.yml
@@ -0,0 +1,5 @@
+version: "3.9"
+
+services:
+  postgres:
+    image: awesome/postgres
diff --git a/examples/non-normative/compose-viz.png b/examples/non-normative/compose-viz.png
new file mode 100644
index 0000000..805094a
Binary files /dev/null and b/examples/non-normative/compose-viz.png differ
diff --git a/tests/in/docker-compose.yaml b/examples/non-normative/docker-compose.yml
similarity index 95%
rename from tests/in/docker-compose.yaml
rename to examples/non-normative/docker-compose.yml
index 3f94ba7..2ed41b9 100644
--- a/tests/in/docker-compose.yaml
+++ b/examples/non-normative/docker-compose.yml
@@ -9,10 +9,9 @@ services:
     image: awesome/monitoring
     networks:
       - admin
-    
+
 
   backend:
-    image: awesome/backend
     networks:
       back-tier:
         aliases:
diff --git a/examples/voting-app/compose-viz.png b/examples/voting-app/compose-viz.png
new file mode 100644
index 0000000..64486c2
Binary files /dev/null and b/examples/voting-app/compose-viz.png differ
diff --git a/examples/voting-app/docker-compose.yml b/examples/voting-app/docker-compose.yml
new file mode 100644
index 0000000..be21988
--- /dev/null
+++ b/examples/voting-app/docker-compose.yml
@@ -0,0 +1,89 @@
+# https://github.com/docker/labs/blob/master/beginner/chapters/votingapp.md
+
+version: "3.9"
+
+services:
+  redis:
+    image: redis:alpine
+    ports:
+      - "6379"
+    networks:
+      - frontend
+    deploy:
+      replicas: 2
+      update_config:
+        parallelism: 2
+        delay: 10s
+      restart_policy:
+        condition: on-failure
+  db:
+    image: postgres:9.4
+    volumes:
+      - db-data:/var/lib/postgresql/data
+    networks:
+      - backend
+    deploy:
+      placement:
+        constraints: [node.role == manager]
+  vote:
+    image: dockersamples/examplevotingapp_vote:before
+    ports:
+      - 5000:80
+    networks:
+      - frontend
+    depends_on:
+      - redis
+    deploy:
+      replicas: 2
+      update_config:
+        parallelism: 2
+      restart_policy:
+        condition: on-failure
+  result:
+    image: dockersamples/examplevotingapp_result:before
+    ports:
+      - 5001:80
+    networks:
+      - backend
+    depends_on:
+      - db
+    deploy:
+      replicas: 1
+      update_config:
+        parallelism: 2
+        delay: 10s
+      restart_policy:
+        condition: on-failure
+  worker:
+    image: dockersamples/examplevotingapp_worker
+    networks:
+      - frontend
+      - backend
+    deploy:
+      mode: replicated
+      replicas: 1
+      labels: [APP=VOTING]
+      restart_policy:
+        condition: on-failure
+        delay: 10s
+        max_attempts: 3
+        window: 120s
+      placement:
+        constraints: [node.role == manager]
+  visualizer:
+    image: dockersamples/visualizer
+    ports:
+      - "8080:8080"
+    stop_grace_period: 1m30s
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    deploy:
+      placement:
+        constraints: [node.role == manager]
+
+networks:
+  frontend:
+  backend:
+
+volumes:
+  db-data:
diff --git a/poetry.lock b/poetry.lock
index 381ddcb..6043af8 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -20,6 +20,14 @@ docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "cloudpickle"]
 
+[[package]]
+name = "cfgv"
+version = "3.3.1"
+description = "Validate configuration and produce human readable error messages."
+category = "dev"
+optional = false
+python-versions = ">=3.6.1"
+
 [[package]]
 name = "click"
 version = "8.1.3"
@@ -39,6 +47,64 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "coverage"
+version = "6.3.3"
+description = "Code coverage measurement for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "extra == \"toml\""}
+
+[package.extras]
+toml = ["tomli"]
+
+[[package]]
+name = "distlib"
+version = "0.3.4"
+description = "Distribution utilities"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "filelock"
+version = "3.7.0"
+description = "A platform independent file lock."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+docs = ["furo (>=2021.8.17b43)", "sphinx (>=4.1)", "sphinx-autodoc-typehints (>=1.12)"]
+testing = ["covdefaults (>=1.2.0)", "coverage (>=4)", "pytest (>=4)", "pytest-cov", "pytest-timeout (>=1.4.2)"]
+
+[[package]]
+name = "graphviz"
+version = "0.20"
+description = "Simple Python interface for Graphviz"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+dev = ["tox (>=3)", "flake8", "pep8-naming", "wheel", "twine"]
+docs = ["sphinx (>=4)", "sphinx-autodoc-typehints", "sphinx-rtd-theme"]
+test = ["pytest (>=7)", "pytest-mock (>=3)", "mock (>=4)", "pytest-cov", "coverage"]
+
+[[package]]
+name = "identify"
+version = "2.5.0"
+description = "File identification library for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+license = ["ukkonen"]
+
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
@@ -47,6 +113,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "nodeenv"
+version = "1.6.0"
+description = "Node.js virtual environment builder"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "packaging"
 version = "21.3"
@@ -58,6 +132,18 @@ python-versions = ">=3.6"
 [package.dependencies]
 pyparsing = ">=2.0.2,<3.0.5 || >3.0.5"
 
+[[package]]
+name = "platformdirs"
+version = "2.5.2"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+docs = ["furo (>=2021.7.5b38)", "proselint (>=0.10.2)", "sphinx-autodoc-typehints (>=1.12)", "sphinx (>=4)"]
+test = ["appdirs (==1.4.4)", "pytest-cov (>=2.7)", "pytest-mock (>=3.6)", "pytest (>=6)"]
+
 [[package]]
 name = "pluggy"
 version = "1.0.0"
@@ -70,6 +156,22 @@ python-versions = ">=3.6"
 dev = ["pre-commit", "tox"]
 testing = ["pytest", "pytest-benchmark"]
 
+[[package]]
+name = "pre-commit"
+version = "2.19.0"
+description = "A framework for managing and maintaining multi-language pre-commit hooks."
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+cfgv = ">=2.0.0"
+identify = ">=1.0.0"
+nodeenv = ">=0.11.1"
+pyyaml = ">=5.1"
+toml = "*"
+virtualenv = ">=20.0.8"
+
 [[package]]
 name = "py"
 version = "1.11.0"
@@ -110,6 +212,68 @@ tomli = ">=1.0.0"
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
+[[package]]
+name = "pytest-cov"
+version = "3.0.0"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+coverage = {version = ">=5.2.1", extras = ["toml"]}
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
+
+[[package]]
+name = "pyyaml"
+version = "6.0"
+description = "YAML parser and emitter for Python"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "ruamel.yaml"
+version = "0.17.21"
+description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order"
+category = "main"
+optional = false
+python-versions = ">=3"
+
+[package.dependencies]
+"ruamel.yaml.clib" = {version = ">=0.2.6", markers = "platform_python_implementation == \"CPython\" and python_version < \"3.11\""}
+
+[package.extras]
+docs = ["ryd"]
+jinja2 = ["ruamel.yaml.jinja2 (>=0.2)"]
+
+[[package]]
+name = "ruamel.yaml.clib"
+version = "0.2.6"
+description = "C version of reader, parser and emitter for ruamel.yaml derived from libyaml"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
 [[package]]
 name = "tomli"
 version = "2.0.1"
@@ -135,10 +299,28 @@ dev = ["autoflake (>=1.3.1,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)"]
 doc = ["mkdocs (>=1.1.2,<2.0.0)", "mkdocs-material (>=8.1.4,<9.0.0)", "mdx-include (>=1.4.1,<2.0.0)"]
 test = ["shellingham (>=1.3.0,<2.0.0)", "pytest (>=4.4.0,<5.4.0)", "pytest-cov (>=2.10.0,<3.0.0)", "coverage (>=5.2,<6.0)", "pytest-xdist (>=1.32.0,<2.0.0)", "pytest-sugar (>=0.9.4,<0.10.0)", "mypy (==0.910)", "black (>=22.3.0,<23.0.0)", "isort (>=5.0.6,<6.0.0)"]
 
+[[package]]
+name = "virtualenv"
+version = "20.14.1"
+description = "Virtual Python Environment builder"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
+[package.dependencies]
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+]
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+    {file = "ruamel.yaml.clib-0.2.6-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:1866cf2c284a03b9524a5cc00daca56d80057c5ce3cdc86a52020f4c720856f0"},
+    {file = "ruamel.yaml.clib-0.2.6-cp39-cp39-win32.whl", hash = "sha256:3fb9575a5acd13031c57a62cc7823e5d2ff8bc3835ba4d94b921b4e6ee664104"},
+    {file = "ruamel.yaml.clib-0.2.6-cp39-cp39-win_amd64.whl", hash = "sha256:825d5fccef6da42f3c8eccd4281af399f21c02b32d98e113dbc631ea6a6ecbc7"},
+    {file = "ruamel.yaml.clib-0.2.6.tar.gz", hash = "sha256:4ff604ce439abb20794f05613c374759ce10e3595d1867764dd1ae675b85acbd"},
+]
+six = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+toml = [
+    {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
+    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+]
 tomli = [
     {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
     {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
@@ -189,3 +524,7 @@ typer = [
     {file = "typer-0.4.1-py3-none-any.whl", hash = "sha256:e8467f0ebac0c81366c2168d6ad9f888efdfb6d4e1d3d5b4a004f46fa444b5c3"},
     {file = "typer-0.4.1.tar.gz", hash = "sha256:5646aef0d936b2c761a10393f0384ee6b5c7fe0bb3e5cd710b17134ca1d99cff"},
 ]
+virtualenv = [
+    {file = "virtualenv-20.14.1-py2.py3-none-any.whl", hash = "sha256:e617f16e25b42eb4f6e74096b9c9e37713cf10bf30168fb4a739f3fa8f898a3a"},
+    {file = "virtualenv-20.14.1.tar.gz", hash = "sha256:ef589a79795589aada0c1c5b319486797c03b67ac3984c48c669c0e4f50df3a5"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index 3b7de75..5a686d1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "compose-viz"
 version = "0.1.0"
-description = "A docker-compose/podman-compose graph visualization tool that allows you to gernerate graph in DOT format or PNG."
+description = "A compose file visualization tool that supports compose-spec and allows you to gernerate graph in DOT format or PNG."
 authors = ["Xyphuz Wu <xyphuzwu@gmail.com>"]
 readme = "README.md"
 license = "MIT"
@@ -14,9 +14,15 @@ include = [
 [tool.poetry.dependencies]
 python = "^3.9"
 typer = "^0.4.1"
+PyYAML = "^6.0"
+graphviz = "^0.20"
+"ruamel.yaml" = "^0.17.21"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.1.2"
+pre-commit = "^2.19.0"
+coverage = "^6.3.3"
+pytest-cov = "^3.0.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/tests/in/000010.yaml b/tests/in/000010.yaml
deleted file mode 100644
index 1bb47e2..0000000
--- a/tests/in/000010.yaml
+++ /dev/null
@@ -1,11 +0,0 @@
-services:
-  base:
-    image: busybox
-    user: root
-  common:
-    image: busybox
-    extends:
-      service: base
-  cli:
-    extends:
-      service: common
\ No newline at end of file
diff --git a/tests/in/000011.yaml b/tests/in/000011.yaml
deleted file mode 100644
index 2336456..0000000
--- a/tests/in/000011.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    extends:
-      service: frontend
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    extends:
-      service: frontend
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/000100.yaml b/tests/in/000100.yaml
deleted file mode 100644
index 34c09b1..0000000
--- a/tests/in/000100.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: "3.9"
-services:
-  web:
-    build: .
-    ports:
-      - "8000:5000"
-  redis:
-    image: "redis:alpine"
\ No newline at end of file
diff --git a/tests/in/000101.yaml b/tests/in/000101.yaml
deleted file mode 100644
index 6d1ce63..0000000
--- a/tests/in/000101.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    ports:
-      - "8000:5000"
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    ports:
-      - "8000:5001"
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    ports:
-      - "8000:5010"
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/000110.yaml b/tests/in/000110.yaml
deleted file mode 100644
index 9ac40e0..0000000
--- a/tests/in/000110.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    ports:
-      - "8000:5000"
-
-  monitoring:
-    image: awesome/monitoring
-    extends:
-      service: frontend
-
-  backend:
-    image: awesome/backend
-    extends:
-      service: frontend
-    ports:
-      - "8000:5001"
\ No newline at end of file
diff --git a/tests/in/000111.yaml b/tests/in/000111.yaml
deleted file mode 100644
index 42fab6c..0000000
--- a/tests/in/000111.yaml
+++ /dev/null
@@ -1,34 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-    ports:
-      - "8000:5000"
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    extends:
-      service: frontend
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    extends:
-      service: frontend
-    ports:
-      - "8000:5001"
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/001000.yaml b/tests/in/001000.yaml
deleted file mode 100644
index 51adbed..0000000
--- a/tests/in/001000.yaml
+++ /dev/null
@@ -1,10 +0,0 @@
-services:
-  web:
-    build: .
-    depends_on:
-      - db
-      - redis
-  redis:
-    image: redis
-  db:
-    image: postgres
\ No newline at end of file
diff --git a/tests/in/001001.yaml b/tests/in/001001.yaml
deleted file mode 100644
index 37a10e0..0000000
--- a/tests/in/001001.yaml
+++ /dev/null
@@ -1,29 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-    depends_on:
-      - monitoring
-      - backend
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/001010.yaml b/tests/in/001010.yaml
deleted file mode 100644
index a598e6b..0000000
--- a/tests/in/001010.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-services:
-  web:
-    build: .
-    depends_on:
-      - db
-      - redis
-    extends:
-      service: redis
-  redis:
-    image: redis
-  db:
-    image: postgres
\ No newline at end of file
diff --git a/tests/in/001011.yaml b/tests/in/001011.yaml
deleted file mode 100644
index 7ef900c..0000000
--- a/tests/in/001011.yaml
+++ /dev/null
@@ -1,31 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-    depends_on:
-      - monitoring
-      - backend
-    extends:
-      service: backend
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/001100.yaml b/tests/in/001100.yaml
deleted file mode 100644
index e3219c8..0000000
--- a/tests/in/001100.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    ports:
-      - "8000:5000"
-
-  monitoring:
-    image: awesome/monitoring
-    depends_on:
-      - backend
-    ports:
-      - "8000:5010"
-
-  backend:
-    image: awesome/backend
-    ports:
-      - "8000:5001"
\ No newline at end of file
diff --git a/tests/in/001101.yaml b/tests/in/001101.yaml
deleted file mode 100644
index 417fe7f..0000000
--- a/tests/in/001101.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    depends_on:
-      - backend
-    ports:
-      - "8000:5010"
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/001110.yaml b/tests/in/001110.yaml
deleted file mode 100644
index 187d4b9..0000000
--- a/tests/in/001110.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    ports:
-      - "8000:5000"
-
-  monitoring:
-    image: awesome/monitoring
-    depends_on:
-      - backend
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-
-  backend:
-    image: awesome/backend
-    extends:
-      service: frontend
-    ports:
-      - "8000:5001"
\ No newline at end of file
diff --git a/tests/in/001111.yaml b/tests/in/001111.yaml
deleted file mode 100644
index 332ed69..0000000
--- a/tests/in/001111.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    depends_on:
-      - backend
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/010000.yaml b/tests/in/010000.yaml
deleted file mode 100644
index b1c39d7..0000000
--- a/tests/in/010000.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-services:
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010001.yaml b/tests/in/010001.yaml
deleted file mode 100644
index 74bd2ea..0000000
--- a/tests/in/010001.yaml
+++ /dev/null
@@ -1,37 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010010.yaml b/tests/in/010010.yaml
deleted file mode 100644
index bd14c8f..0000000
--- a/tests/in/010010.yaml
+++ /dev/null
@@ -1,13 +0,0 @@
-services:
-  common:
-    image: busybox
-    volumes:
-      - common-volume:/var/lib/backup/data:rw
-  cli:
-    extends:
-      service: common
-    volumes:
-      - cli-volume:/var/lib/backup/data:ro
-volumes:
-  common-volume:
-  cli-volume:
\ No newline at end of file
diff --git a/tests/in/010011.yaml b/tests/in/010011.yaml
deleted file mode 100644
index fad0350..0000000
--- a/tests/in/010011.yaml
+++ /dev/null
@@ -1,39 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: monitoring
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010100.yaml b/tests/in/010100.yaml
deleted file mode 100644
index de377ee..0000000
--- a/tests/in/010100.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-services:
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    ports:
-      - "8000:5000"
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010101.yaml b/tests/in/010101.yaml
deleted file mode 100644
index 86a28b1..0000000
--- a/tests/in/010101.yaml
+++ /dev/null
@@ -1,39 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    ports:
-      - "8000:5000"
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010110.yaml b/tests/in/010110.yaml
deleted file mode 100644
index ef63463..0000000
--- a/tests/in/010110.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: monitoring
-    ports:
-      - "8000:5000"
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/010111.yaml b/tests/in/010111.yaml
deleted file mode 100644
index b3d9888..0000000
--- a/tests/in/010111.yaml
+++ /dev/null
@@ -1,41 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: monitoring
-    ports:
-      - "8000:5000"
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011000.yaml b/tests/in/011000.yaml
deleted file mode 100644
index 4ef3c19..0000000
--- a/tests/in/011000.yaml
+++ /dev/null
@@ -1,22 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    depends_on:
-      - backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-
-  backend:
-    image: awesome/backend
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011001.yaml b/tests/in/011001.yaml
deleted file mode 100644
index 023ab8c..0000000
--- a/tests/in/011001.yaml
+++ /dev/null
@@ -1,40 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011010.yaml b/tests/in/011010.yaml
deleted file mode 100644
index a65c17e..0000000
--- a/tests/in/011010.yaml
+++ /dev/null
@@ -1,26 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011011.yaml b/tests/in/011011.yaml
deleted file mode 100644
index 67bfde1..0000000
--- a/tests/in/011011.yaml
+++ /dev/null
@@ -1,42 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011100.yaml b/tests/in/011100.yaml
deleted file mode 100644
index dbebc65..0000000
--- a/tests/in/011100.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    ports:
-      - "8000:5000"
-
-  monitoring:
-    image: awesome/monitoring
-    depends_on:
-      - backend
-    ports:
-      - "8000:5010"
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-
-  backend:
-    image: awesome/backend
-    ports:
-      - "8000:5001"
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011101.yaml b/tests/in/011101.yaml
deleted file mode 100644
index dd833f4..0000000
--- a/tests/in/011101.yaml
+++ /dev/null
@@ -1,74 +0,0 @@
-services:
-  vote:
-    build: ./
-    # use python rather than gunicorn for local dev
-    command: python app.py
-    depends_on:
-      redis:
-        condition: service_healthy 
-    volumes:
-     - app
-    ports:
-      - "5000:80"
-    networks:
-      - front-tier
-      - back-tier
-
-  result:
-    build: ./
-    # use nodemon rather than node for local dev
-    command: nodemon server.js
-    depends_on:
-      db:
-        condition: service_healthy 
-    volumes:
-      - app
-    ports:
-      - "5001:80"
-      - "5858:5858"
-    networks:
-      - front-tier
-      - back-tier
-
-  worker:
-    build:
-      context: ./
-    depends_on:
-      redis:
-        condition: service_healthy 
-      db:
-        condition: service_healthy 
-    networks:
-      - back-tier
-
-  redis:
-    image: redis:5.0-alpine3.10
-    volumes:
-      - "./healthchecks:/healthchecks"
-    healthcheck:
-      test: /healthchecks/redis.sh
-      interval: "5s"
-    ports: ["6379"]
-    networks:
-      - back-tier
-
-  db:
-    image: postgres:9.4
-    environment:
-      POSTGRES_USER: "postgres"
-      POSTGRES_PASSWORD: "postgres"
-    volumes:
-      - "db-data:/var/lib/postgresql/data"
-      - "./healthchecks:/healthchecks"
-    healthcheck:
-      test: /healthchecks/postgres.sh
-      interval: "5s"
-    networks:
-      - back-tier
-
-volumes:
-  db-data:
-
-networks:
-  front-tier:
-  back-tier:
diff --git a/tests/in/011110.yaml b/tests/in/011110.yaml
deleted file mode 100644
index 97f8c0d..0000000
--- a/tests/in/011110.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-
-  monitoring:
-    image: awesome/monitoring
-
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/011111.yaml b/tests/in/011111.yaml
deleted file mode 100644
index 797150d..0000000
--- a/tests/in/011111.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/100001.yaml b/tests/in/100001.yaml
deleted file mode 100644
index 82a5fa2..0000000
--- a/tests/in/100001.yaml
+++ /dev/null
@@ -1,31 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/100010.yaml b/tests/in/100010.yaml
deleted file mode 100644
index 5f72c8a..0000000
--- a/tests/in/100010.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/100011.yaml b/tests/in/100011.yaml
deleted file mode 100644
index bbd4fd2..0000000
--- a/tests/in/100011.yaml
+++ /dev/null
@@ -1,33 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/100100.yaml b/tests/in/100100.yaml
deleted file mode 100644
index 4640d65..0000000
--- a/tests/in/100100.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/100101.yaml b/tests/in/100101.yaml
deleted file mode 100644
index bf6cac2..0000000
--- a/tests/in/100101.yaml
+++ /dev/null
@@ -1,33 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/100110.yaml b/tests/in/100110.yaml
deleted file mode 100644
index 34b31ca..0000000
--- a/tests/in/100110.yaml
+++ /dev/null
@@ -1,18 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/100111.yaml b/tests/in/100111.yaml
deleted file mode 100644
index 3c718f8..0000000
--- a/tests/in/100111.yaml
+++ /dev/null
@@ -1,35 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/101000.yaml b/tests/in/101000.yaml
deleted file mode 100644
index 72d5f8c..0000000
--- a/tests/in/101000.yaml
+++ /dev/null
@@ -1,16 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    depends_on:
-      - monitoring
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/101001.yaml b/tests/in/101001.yaml
deleted file mode 100644
index a01f7ae..0000000
--- a/tests/in/101001.yaml
+++ /dev/null
@@ -1,33 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    depends_on:
-      - monitoring
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/101010.yaml b/tests/in/101010.yaml
deleted file mode 100644
index ec3ee66..0000000
--- a/tests/in/101010.yaml
+++ /dev/null
@@ -1,18 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    depends_on:
-      - monitoring
-    links:
-      - "db:database"
-    extends:
-      service: frontend
-  db:
-    image: postgres
diff --git a/tests/in/101011.yaml b/tests/in/101011.yaml
deleted file mode 100644
index 3b42bb5..0000000
--- a/tests/in/101011.yaml
+++ /dev/null
@@ -1,35 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/101100.yaml b/tests/in/101100.yaml
deleted file mode 100644
index b08993e..0000000
--- a/tests/in/101100.yaml
+++ /dev/null
@@ -1,18 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    depends_on:
-      - monitoring
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/101101.yaml b/tests/in/101101.yaml
deleted file mode 100644
index 8b521fe..0000000
--- a/tests/in/101101.yaml
+++ /dev/null
@@ -1,35 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    depends_on:
-      - monitoring
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/101110.yaml b/tests/in/101110.yaml
deleted file mode 100644
index 6428644..0000000
--- a/tests/in/101110.yaml
+++ /dev/null
@@ -1,21 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-
-    
-
-  backend:
-    image: awesome/backend
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
diff --git a/tests/in/101111.yaml b/tests/in/101111.yaml
deleted file mode 100644
index ce845ca..0000000
--- a/tests/in/101111.yaml
+++ /dev/null
@@ -1,37 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
\ No newline at end of file
diff --git a/tests/in/110000.yaml b/tests/in/110000.yaml
deleted file mode 100644
index b07f8ff..0000000
--- a/tests/in/110000.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    links:
-      - "db:database"
-
-  backend:
-    image: awesome/backend
-  db:
-    image: postgres
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110001.yaml b/tests/in/110001.yaml
deleted file mode 100644
index 6475de2..0000000
--- a/tests/in/110001.yaml
+++ /dev/null
@@ -1,42 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110010.yaml b/tests/in/110010.yaml
deleted file mode 100644
index 297dddd..0000000
--- a/tests/in/110010.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110011.yaml b/tests/in/110011.yaml
deleted file mode 100644
index 8778ea3..0000000
--- a/tests/in/110011.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110100.yaml b/tests/in/110100.yaml
deleted file mode 100644
index 9ef067c..0000000
--- a/tests/in/110100.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110101.yaml b/tests/in/110101.yaml
deleted file mode 100644
index 2a8000c..0000000
--- a/tests/in/110101.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110110.yaml b/tests/in/110110.yaml
deleted file mode 100644
index 72f8a30..0000000
--- a/tests/in/110110.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/110111.yaml b/tests/in/110111.yaml
deleted file mode 100644
index 0bda8ef..0000000
--- a/tests/in/110111.yaml
+++ /dev/null
@@ -1,46 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111000.yaml b/tests/in/111000.yaml
deleted file mode 100644
index 24483e4..0000000
--- a/tests/in/111000.yaml
+++ /dev/null
@@ -1,26 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    depends_on:
-      - backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    links:
-      - "db:database"
-
-  backend:
-    image: awesome/backend
-  db:
-    image: postgres
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111001.yaml b/tests/in/111001.yaml
deleted file mode 100644
index b6acfed..0000000
--- a/tests/in/111001.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111010.yaml b/tests/in/111010.yaml
deleted file mode 100644
index fcd05b9..0000000
--- a/tests/in/111010.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111011.yaml b/tests/in/111011.yaml
deleted file mode 100644
index 1fbf1b1..0000000
--- a/tests/in/111011.yaml
+++ /dev/null
@@ -1,46 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111100.yaml b/tests/in/111100.yaml
deleted file mode 100644
index 23c650b..0000000
--- a/tests/in/111100.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111101.yaml b/tests/in/111101.yaml
deleted file mode 100644
index 79ebf03..0000000
--- a/tests/in/111101.yaml
+++ /dev/null
@@ -1,46 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111110.yaml b/tests/in/111110.yaml
deleted file mode 100644
index 4250938..0000000
--- a/tests/in/111110.yaml
+++ /dev/null
@@ -1,31 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-  monitoring:
-    image: awesome/monitoring
-    
-
-  backend:
-    image: awesome/backend
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/in/111111.yaml b/tests/in/111111.yaml
deleted file mode 100644
index e506c33..0000000
--- a/tests/in/111111.yaml
+++ /dev/null
@@ -1,48 +0,0 @@
-services:
-  frontend:
-    image: awesome/webapp
-    networks:
-      - front-tier
-      - back-tier
-
-  monitoring:
-    image: awesome/monitoring
-    networks:
-      - admin
-    
-
-  backend:
-    image: awesome/backend
-    networks:
-      back-tier:
-        aliases:
-          - database
-      admin:
-        aliases:
-          - mysql
-    volumes:
-      - type: volume
-        source: db-data
-        target: /data
-        volume:
-          nocopy: true
-      - type: bind
-        source: /var/run/postgres/postgres.sock
-        target: /var/run/postgres/postgres.sock
-    depends_on:
-      - monitoring
-    extends:
-      service: frontend
-    ports:
-      - "8000:5010"
-    links:
-      - "db:database"
-  db:
-    image: postgres
-
-networks:
-  front-tier:
-  back-tier:
-  admin:
-volumes:
-  db-data:
\ No newline at end of file
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 3f427b5..bfcdbcd 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,13 +1,34 @@
-from typer.testing import CliRunner
-from compose_viz import cli
+import os
 
+import pytest
+from typer.testing import CliRunner
+
+from compose_viz import cli
 
 runner = CliRunner()
 
 
-def test_cli():
-    input_path = "tests/in/000001.yaml"
-    result = runner.invoke(cli.app, [input_path])
+@pytest.mark.parametrize(
+    "test_file_path",
+    [
+        "tests/ymls/builds/docker-compose.yml",
+        "tests/ymls/depends_on/docker-compose.yml",
+        "tests/ymls/extends/docker-compose.yml",
+        "tests/ymls/links/docker-compose.yml",
+        "tests/ymls/networks/docker-compose.yml",
+        "tests/ymls/ports/docker-compose.yml",
+        "tests/ymls/volumes/docker-compose.yml",
+        "examples/full-stack-node-app/docker-compose.yml",
+        "examples/non-normative/docker-compose.yml",
+    ],
+)
+def test_cli(test_file_path: str) -> None:
+    input_path = f"{test_file_path}"
+    output_path = "compose-viz-test.png"
+    result = runner.invoke(cli.app, ["-o", output_path, input_path])
 
     assert result.exit_code == 0
     assert f"Successfully parsed {input_path}\n" in result.stdout
+    assert os.path.exists(output_path)
+
+    os.remove(output_path)
diff --git a/tests/test_extends.py b/tests/test_extends.py
new file mode 100644
index 0000000..ad7e4c5
--- /dev/null
+++ b/tests/test_extends.py
@@ -0,0 +1,28 @@
+import pytest
+
+from compose_viz.extends import Extends
+
+
+def test_extend_init_normal() -> None:
+    try:
+        e = Extends(service_name="frontend", from_file="tests/ymls/others/empty.yaml")
+
+        assert e.service_name == "frontend"
+        assert e.from_file == "tests/ymls/others/empty.yaml"
+    except Exception as e:
+        assert False, e
+
+
+def test_extend_init_without_from_file() -> None:
+    try:
+        e = Extends(service_name="frontend")
+
+        assert e.service_name == "frontend"
+        assert e.from_file is None
+    except Exception as e:
+        assert False, e
+
+
+def test_extend_init_without_service_name() -> None:
+    with pytest.raises(TypeError):
+        Extends(from_file="tests/ymls/others/empty.yaml")  # type: ignore
diff --git a/tests/test_module.py b/tests/test_module.py
new file mode 100644
index 0000000..136b7a9
--- /dev/null
+++ b/tests/test_module.py
@@ -0,0 +1,5 @@
+import os
+
+
+def test_module():
+    assert os.system("python -m compose_viz") == 0
diff --git a/tests/test_parse_file.py b/tests/test_parse_file.py
index bfc6b4a..f384789 100644
--- a/tests/test_parse_file.py
+++ b/tests/test_parse_file.py
@@ -1,28 +1,266 @@
-from compose_viz.parser import Parser
+import pytest
+
 from compose_viz.compose import Compose
+from compose_viz.extends import Extends
+from compose_viz.parser import Parser
+from compose_viz.port import Port, Protocol
 from compose_viz.service import Service
+from compose_viz.volume import Volume, VolumeType
 
 
-def test_parse_file():
-    expected: Compose = Compose([
-        Service(
-            name='frontend',
-            image='awesome/webapp',
-            networks=['front-tier', 'back-tier'],
+@pytest.mark.parametrize(
+    "test_file_path, expected",
+    [
+        (
+            "builds/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="frontend",
+                        image="build from './frontend', image: awesome/frontend",
+                    ),
+                    Service(
+                        name="backend",
+                        image="build from 'backend' using '../backend.Dockerfile'",
+                    ),
+                    Service(
+                        name="db",
+                        image="build from './db'",
+                    ),
+                ],
+            ),
         ),
-        Service(
-            name='monitoring',
-            image='awesome/monitoring',
-            networks=['admin'],
+        (
+            "depends_on/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="frontend",
+                        image="awesome/frontend",
+                        depends_on=[
+                            "db",
+                            "redis",
+                        ],
+                    ),
+                    Service(
+                        name="backend",
+                        image="awesome/backend",
+                        depends_on=[
+                            "db",
+                            "redis",
+                        ],
+                    ),
+                    Service(
+                        name="db",
+                        image="mysql",
+                    ),
+                    Service(
+                        name="redis",
+                        image="redis",
+                    ),
+                ],
+            ),
         ),
-        Service(
-            name='backend',
-            image='awesome/backend',
-            networks=['back-tier', 'admin'],
+        (
+            "extends/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="base",
+                        image="alpine:latest",
+                    ),
+                    Service(
+                        name="derive_from_base",
+                        image="alpine:edge",
+                        extends=Extends(
+                            service_name="base",
+                        ),
+                    ),
+                    Service(
+                        name="derive_from_file",
+                        extends=Extends(
+                            service_name="web",
+                            from_file="web.yml",
+                        ),
+                    ),
+                ],
+            ),
         ),
-    ])
-
+        (
+            "links/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="frontend",
+                        image="awesome/frontend",
+                        links=[
+                            "db:database",
+                        ],
+                    ),
+                    Service(
+                        name="db",
+                        image="mysql",
+                    ),
+                ],
+            ),
+        ),
+        (
+            "networks/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="frontend",
+                        image="awesome/frontend",
+                        networks=[
+                            "front-tier",
+                            "back-tier",
+                        ],
+                    ),
+                    Service(
+                        name="monitoring",
+                        image="awesome/monitoring",
+                        networks=[
+                            "admin",
+                        ],
+                    ),
+                    Service(
+                        name="backend",
+                        image="awesome/backend",
+                        networks=[
+                            "back-tier",
+                            "admin",
+                        ],
+                    ),
+                ],
+            ),
+        ),
+        (
+            "ports/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="frontend",
+                        image="awesome/frontend",
+                        ports=[
+                            Port(
+                                host_port="0.0.0.0:3000",
+                                container_port="3000",
+                            ),
+                            Port(
+                                host_port="0.0.0.0:3000-3005",
+                                container_port="3000-3005",
+                            ),
+                            Port(
+                                host_port="0.0.0.0:9090-9091",
+                                container_port="8080-8081",
+                            ),
+                            Port(
+                                host_port="0.0.0.0:49100",
+                                container_port="22",
+                            ),
+                            Port(
+                                host_port="127.0.0.1:8001",
+                                container_port="8001",
+                            ),
+                            Port(
+                                host_port="127.0.0.1:5000-5010",
+                                container_port="5000-5010",
+                            ),
+                            Port(
+                                host_port="0.0.0.0:6060",
+                                container_port="6060",
+                                protocol=Protocol.udp,
+                            ),
+                            Port(
+                                host_port="127.0.0.1:8080",
+                                container_port="80",
+                                protocol=Protocol.tcp,
+                            ),
+                            Port(
+                                host_port="0.0.0.0:443",
+                                container_port="443",
+                            ),
+                        ],
+                    ),
+                ],
+            ),
+        ),
+        (
+            "volumes/docker-compose",
+            Compose(
+                services=[
+                    Service(
+                        name="backend",
+                        image="awesome/backend",
+                        volumes=[
+                            Volume(
+                                source="./data",
+                                target="/data",
+                            ),
+                            Volume(
+                                source="/var/run/postgres/postgres.sock",
+                                target="/var/run/postgres/postgres.sock",
+                                type=VolumeType.bind,
+                            ),
+                        ],
+                    ),
+                    Service(
+                        name="common",
+                        image="busybox",
+                        volumes=[
+                            Volume(
+                                source="common-volume",
+                                target="/var/lib/backup/data",
+                            ),
+                        ],
+                    ),
+                    Service(
+                        name="cli",
+                        extends=Extends(
+                            service_name="common",
+                        ),
+                        volumes=[
+                            Volume(
+                                source="cli-volume",
+                                target="/var/lib/backup/data",
+                                access_mode="ro,z",
+                            ),
+                        ],
+                    ),
+                ],
+            ),
+        ),
+    ],
+)
+def test_parse_file(test_file_path: str, expected: Compose) -> None:
     parser = Parser()
-    actual = parser.parse('tests/in/000001.yaml')
+    actual = parser.parse(f"tests/ymls/{test_file_path}.yml")
 
-    assert actual == expected
+    assert len(actual.services) == len(expected.services)
+
+    for actual_service, expected_service in zip(actual.services, expected.services):
+        assert actual_service.name == expected_service.name
+        assert actual_service.image == expected_service.image
+
+        assert len(actual_service.ports) == len(expected_service.ports)
+        for actual_port, expected_port in zip(actual_service.ports, expected_service.ports):
+            assert actual_port.host_port == expected_port.host_port
+            assert actual_port.container_port == expected_port.container_port
+            assert actual_port.protocol == expected_port.protocol
+
+        assert actual_service.networks == expected_service.networks
+
+        assert len(actual_service.volumes) == len(expected_service.volumes)
+        for actual_volume, expected_volume in zip(actual_service.volumes, expected_service.volumes):
+            assert actual_volume.source == expected_volume.source
+            assert actual_volume.target == expected_volume.target
+            assert actual_volume.type == expected_volume.type
+
+        assert actual_service.depends_on == expected_service.depends_on
+        assert actual_service.links == expected_service.links
+
+        assert (actual_service.extends is not None) == (expected_service.extends is not None)
+
+        if (actual_service.extends is not None) and (expected_service.extends is not None):
+            assert actual_service.extends.service_name == expected_service.extends.service_name
+            assert actual_service.extends.from_file == expected_service.extends.from_file
diff --git a/tests/test_parser.py b/tests/test_parser.py
new file mode 100644
index 0000000..0e3d33f
--- /dev/null
+++ b/tests/test_parser.py
@@ -0,0 +1,18 @@
+import pytest
+
+from compose_viz.parser import Parser
+
+
+def test_parser_error_parsing_file() -> None:
+    with pytest.raises(RuntimeError, match=r"Error parsing file 'tests/ymls/others/invalid.yml'.*"):
+        Parser().parse("tests/ymls/others/invalid.yml")
+
+
+def test_parser_invalid_yaml() -> None:
+    with pytest.raises(RuntimeError, match=r"Empty yaml file, aborting."):
+        Parser().parse("tests/ymls/others/empty.yml")
+
+
+def test_parser_no_services_found() -> None:
+    with pytest.raises(RuntimeError, match=r"No services found, aborting."):
+        Parser().parse("tests/ymls/others/no-services.yml")
diff --git a/tests/test_port.py b/tests/test_port.py
new file mode 100644
index 0000000..159c92c
--- /dev/null
+++ b/tests/test_port.py
@@ -0,0 +1,23 @@
+from compose_viz.port import Port, Protocol
+
+
+def test_port_init_normal() -> None:
+    try:
+        p = Port(host_port="8080", container_port="80")
+
+        assert p.host_port == "8080"
+        assert p.container_port == "80"
+        assert p.protocol == Protocol.any
+    except Exception as e:
+        assert False, e
+
+
+def test_port_with_protocol() -> None:
+    try:
+        p = Port(host_port="8080", container_port="80", protocol=Protocol.udp)
+
+        assert p.host_port == "8080"
+        assert p.container_port == "80"
+        assert p.protocol == Protocol.udp
+    except Exception as e:
+        assert False, e
diff --git a/tests/test_version.py b/tests/test_version.py
index 1d2abd6..27ecc67 100644
--- a/tests/test_version.py
+++ b/tests/test_version.py
@@ -1,11 +1,11 @@
 from typer.testing import CliRunner
-from compose_viz import cli, __app_name__, __version__
 
+from compose_viz import __app_name__, __version__, cli
 
 runner = CliRunner()
 
 
-def test_version():
+def test_version() -> None:
     result = runner.invoke(cli.app, ["--version"])
 
     assert result.exit_code == 0
diff --git a/tests/test_volume.py b/tests/test_volume.py
new file mode 100644
index 0000000..b3651ec
--- /dev/null
+++ b/tests/test_volume.py
@@ -0,0 +1,37 @@
+from compose_viz.volume import Volume, VolumeType
+
+
+def test_volume_init_normal() -> None:
+    try:
+        v = Volume(source="./foo", target="./bar")
+
+        assert v.source == "./foo"
+        assert v.target == "./bar"
+        assert v.type == VolumeType.volume
+        assert v.access_mode == "rw"
+    except Exception as e:
+        assert False, e
+
+
+def test_volume_with_type() -> None:
+    try:
+        v = Volume(source="./foo", target="./bar", type=VolumeType.bind)
+
+        assert v.source == "./foo"
+        assert v.target == "./bar"
+        assert v.type == VolumeType.bind
+        assert v.access_mode == "rw"
+    except Exception as e:
+        assert False, e
+
+
+def test_volume_with_access_mode() -> None:
+    try:
+        v = Volume(source="./foo", target="./bar", access_mode="ro,z")
+
+        assert v.source == "./foo"
+        assert v.target == "./bar"
+        assert v.type == VolumeType.volume
+        assert v.access_mode == "ro,z"
+    except Exception as e:
+        assert False, e
diff --git a/tests/ymls/builds/docker-compose.yml b/tests/ymls/builds/docker-compose.yml
new file mode 100644
index 0000000..fff4866
--- /dev/null
+++ b/tests/ymls/builds/docker-compose.yml
@@ -0,0 +1,15 @@
+version: "3.9"
+
+services:
+  frontend:
+    image: awesome/frontend
+    build: ./frontend
+
+  backend:
+    build:
+      context: backend
+      dockerfile: ../backend.Dockerfile
+
+  db:
+    build:
+      context: ./db
diff --git a/tests/ymls/depends_on/docker-compose.yml b/tests/ymls/depends_on/docker-compose.yml
new file mode 100644
index 0000000..e949719
--- /dev/null
+++ b/tests/ymls/depends_on/docker-compose.yml
@@ -0,0 +1,19 @@
+version: "3.9"
+
+services:
+  frontend:
+    image: awesome/frontend
+    depends_on:
+      db:
+        condition: service_healthy
+      redis:
+        condition: service_started
+  backend:
+    image: awesome/backend
+    depends_on:
+      - db
+      - redis
+  db:
+    image: mysql
+  redis:
+    image: redis
diff --git a/tests/ymls/extends/docker-compose.yml b/tests/ymls/extends/docker-compose.yml
new file mode 100644
index 0000000..caf2a1e
--- /dev/null
+++ b/tests/ymls/extends/docker-compose.yml
@@ -0,0 +1,14 @@
+version: "3.9"
+
+services:
+  base:
+    image: alpine:latest
+    tty: true
+  derive_from_base:
+    image: alpine:edge
+    extends:
+      service: base
+  derive_from_file:
+    extends:
+      file: web.yml
+      service: web
diff --git a/tests/ymls/extends/web.yml b/tests/ymls/extends/web.yml
new file mode 100644
index 0000000..1676371
--- /dev/null
+++ b/tests/ymls/extends/web.yml
@@ -0,0 +1,5 @@
+version: "3.9"
+
+services:
+  web:
+    image: awesome/web
diff --git a/tests/in/100000.yaml b/tests/ymls/links/docker-compose.yml
similarity index 53%
rename from tests/in/100000.yaml
rename to tests/ymls/links/docker-compose.yml
index c214153..cac78e9 100644
--- a/tests/in/100000.yaml
+++ b/tests/ymls/links/docker-compose.yml
@@ -1,9 +1,9 @@
 version: "3.9"
-services:
 
-  web:
-    build: .
+services:
+  frontend:
+    image: awesome/frontend
     links:
       - "db:database"
   db:
-    image: postgres
\ No newline at end of file
+    image: mysql
diff --git a/tests/in/000001.yaml b/tests/ymls/networks/docker-compose.yml
similarity index 86%
rename from tests/in/000001.yaml
rename to tests/ymls/networks/docker-compose.yml
index 1683eba..9210e39 100644
--- a/tests/in/000001.yaml
+++ b/tests/ymls/networks/docker-compose.yml
@@ -1,6 +1,8 @@
+version: "3.9"
+
 services:
   frontend:
-    image: awesome/webapp
+    image: awesome/frontend
     networks:
       - front-tier
       - back-tier
@@ -23,4 +25,4 @@ services:
 networks:
   front-tier:
   back-tier:
-  admin:
\ No newline at end of file
+  admin:
diff --git a/tests/ymls/others/empty.yml b/tests/ymls/others/empty.yml
new file mode 100644
index 0000000..e69de29
diff --git a/tests/ymls/others/invalid.yml b/tests/ymls/others/invalid.yml
new file mode 100644
index 0000000..8e7a231
--- /dev/null
+++ b/tests/ymls/others/invalid.yml
@@ -0,0 +1,3 @@
+what-is-this:
+  "an invalid yaml"
+  "test purpose"
diff --git a/tests/ymls/others/no-services.yml b/tests/ymls/others/no-services.yml
new file mode 100644
index 0000000..a0bf4a1
--- /dev/null
+++ b/tests/ymls/others/no-services.yml
@@ -0,0 +1,3 @@
+what-is-this:
+  - "a yaml file without services"
+  - "test purpose"
diff --git a/tests/ymls/ports/docker-compose.yml b/tests/ymls/ports/docker-compose.yml
new file mode 100644
index 0000000..642a975
--- /dev/null
+++ b/tests/ymls/ports/docker-compose.yml
@@ -0,0 +1,18 @@
+version: "3.9"
+
+services:
+  frontend:
+    image: awesome/frontend
+    ports:
+      - "3000"
+      - "3000-3005"
+      - "9090-9091:8080-8081"
+      - "49100:22"
+      - "127.0.0.1:8001:8001"
+      - "127.0.0.1:5000-5010:5000-5010"
+      - "6060:6060/udp"
+      - target: 80
+        host_ip: 127.0.0.1
+        published: 8080
+        protocol: tcp
+      - target: 443
diff --git a/tests/ymls/volumes/docker-compose.yml b/tests/ymls/volumes/docker-compose.yml
new file mode 100644
index 0000000..4edb77c
--- /dev/null
+++ b/tests/ymls/volumes/docker-compose.yml
@@ -0,0 +1,23 @@
+version: "3.9"
+
+services:
+  backend:
+    image: awesome/backend
+    volumes:
+      - "./data:/data"
+      - type: bind
+        source: /var/run/postgres/postgres.sock
+        target: /var/run/postgres/postgres.sock
+  common:
+    image: busybox
+    volumes:
+      - common-volume:/var/lib/backup/data:rw,z
+  cli:
+    extends:
+      service: common
+    volumes:
+      - cli-volume:/var/lib/backup/data:ro
+
+volumes:
+  common-volume:
+  cli-volume: