test: use a better way to make assertion

tests/test_parse_file.py

@@ -25,4 +25,14 @@ def test_parse_file():
     parser = Parser()
     actual = parser.parse('tests/in/000001.yaml')
 
-    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 actual_service.ports == expected_service.ports
+        assert actual_service.networks == expected_service.networks
+        assert actual_service.volumes == expected_service.volumes
+        assert actual_service.depends_on == expected_service.depends_on
+        assert actual_service.links == expected_service.links
+        assert actual_service.extends == expected_service.extends