Added proper tests (but more should be addedgit add --all :/)

src/wireguard_config.rs

@@ -1,4 +1,5 @@
 use crate::exporter_error::PeerEntryParseError;
+use log::debug;
 use std::collections::HashMap;
 use std::convert::TryFrom;
 
@@ -22,7 +23,10 @@ fn after_char(s: &str, c_split: char) -> &str {
     s
 }
 
-fn parse_peer_entry<'a>(lines: &[&'a str]) -> Result<PeerEntry<'a>, PeerEntryParseError> {
+impl<'a> TryFrom<&[&'a str]> for PeerEntry<'a> {
+    type Error = PeerEntryParseError;
+
+    fn try_from(lines: &[&'a str]) -> Result<PeerEntry<'a>, Self::Error> {
         let mut public_key = "";
         let mut allowed_ips = "";
         let mut name = None;
@@ -33,12 +37,17 @@ fn parse_peer_entry<'a>(lines: &[&'a str]) -> Result<PeerEntry<'a>, PeerEntryPar
             } else if line.starts_with("AllowedIPs") {
                 allowed_ips = after_char(line, '=').trim();
             } else if line.starts_with("#") {
+                // since the pound sign is 1 byte the below slice will work
                 name = Some(line[1..].trim());
             }
         }
 
         // Sanity checks
+        // If there are more than one PublicKey or AllowedIPs we won't catch it. But
+        // WireGuard won't be working either so we can live with this simplification.
         if public_key == "" {
+            // we return a owned String for ergonomics. This will allocate but it's ok since it's not supposed
+            // to happen :)
             let lines_owned: Vec<String> = lines.into_iter().map(|line| line.to_string()).collect();
             Err(PeerEntryParseError::PublicKeyNotFound { lines: lines_owned })
         } else if allowed_ips == "" {
@@ -52,11 +61,16 @@ fn parse_peer_entry<'a>(lines: &[&'a str]) -> Result<PeerEntry<'a>, PeerEntryPar
             })
         }
     }
+}
 
-pub(crate) fn parse<'a>(
-    txt: &'a str,
-) -> Result<HashMap<&'a str, PeerEntry<'a>>, PeerEntryParseError> {
-    let mut ht = HashMap::new();
+#[derive(Debug, Default, Clone)]
+pub(crate) struct PeerEntryHashMap<'a>(HashMap<&'a str, PeerEntry<'a>>);
+
+impl<'a> TryFrom<&'a str> for PeerEntryHashMap<'a> {
+    type Error = PeerEntryParseError;
+
+    fn try_from(txt: &'a str) -> Result<PeerEntryHashMap, Self::Error> {
+        let mut hm = HashMap::new();
 
         let mut v_blocks = Vec::new();
         let mut cur_block: Option<Vec<&str>> = None;
@@ -88,16 +102,17 @@ pub(crate) fn parse<'a>(
             v_blocks.push(cur_block);
         }
 
-    println!("v_blocks == {:?}", v_blocks);
+        debug!("v_blocks == {:?}", v_blocks);
 
         for block in &v_blocks {
-        let p = parse_peer_entry(block)?;
-        ht.insert(p.public_key, p);
+            let p: PeerEntry = PeerEntry::try_from(&block as &[&str])?;
+            hm.insert(p.public_key, p);
         }
 
-    println!("ht == {:?}", ht);
+        debug!("hm == {:?}", hm);
 
-    Ok(ht)
+        Ok(PeerEntryHashMap(hm))
+    }
 }
 
 #[cfg(test)]
@@ -139,14 +154,69 @@ AllowedIPs = 10.70.0.40/32
 # OnePlus 5T
 PublicKey = 928vO9Lf4+Mo84cWu4k1oRyzf0AR7FTGoPKHGoTMSHk=
 AllowedIPs = 10.70.0.80/32
+";
+
+    const TEXT_NOPK: &'static str = "
+ListenPort = 51820
+PrivateKey = my_super_secret_private_key
+# PreUp = iptables -t nat -A POSTROUTING -s 10.70.0.0/24  -o enp7s0 -j MASQUERADE
+# PostDown = iptables -t nat -D POSTROUTING -s 10.70.0.0/24  -o enp7s0 -j MASQUERADE
+
+[Peer]
+# OnePlus 6T
+PublicKey = 2S7mA0vEMethCNQrJpJKE81/JmhgtB+tHHLYQhgM6kk=
+AllowedIPs = 10.70.0.2/32
+
+[Peer]
+# varch.local (laptop)
+AllowedIPs = 10.70.0.3/32
+
+[Peer]
+# cantarch
+PublicKey = L2UoJZN7RmEKsMmqaJgKG0m1S2Zs2wd2ptAf+kb3008=
+AllowedIPs = 10.70.0.4/32
+";
+
+    const TEXT_AIP: &'static str = "
+ListenPort = 51820
+PrivateKey = my_super_secret_private_key
+# PreUp = iptables -t nat -A POSTROUTING -s 10.70.0.0/24  -o enp7s0 -j MASQUERADE
+# PostDown = iptables -t nat -D POSTROUTING -s 10.70.0.0/24  -o enp7s0 -j MASQUERADE
+
+[Peer]
+# OnePlus 6T
+PublicKey = 2S7mA0vEMethCNQrJpJKE81/JmhgtB+tHHLYQhgM6kk=
+AllowedIPs = 10.70.0.2/32
+
+[Peer]
+# varch.local (laptop)
+AllowedIPs = 10.70.0.3/32
+PublicKey = 6S7mA0vEMethCNQrJpJKE81/JmhgtB+tHHLYQhgM6kk=
+
+[Peer]
+# cantarch
+PublicKey = L2UoJZN7RmEKsMmqaJgKG0m1S2Zs2wd2ptAf+kb3008=
 ";
 
     #[test]
-    fn test_parse() {
-        let a = parse(TEXT);
+    fn test_parse_ok() {
+        let a: PeerEntryHashMap = PeerEntryHashMap::try_from(TEXT).unwrap();
         println!("{:?}", a);
     }
 
     #[test]
-    fn test_parse_and_serialize() {}
+    #[should_panic(
+        expected = "PublicKeyNotFound { lines: [\"# varch.local (laptop)\", \"AllowedIPs = 10.70.0.3/32\"] }"
+    )]
+    fn test_parse_no_public_key() {
+        let _: PeerEntryHashMap = PeerEntryHashMap::try_from(TEXT_NOPK).unwrap();
+    }
+
+    #[test]
+    #[should_panic(
+        expected = "AllowedIPsEntryNotFound { lines: [\"# cantarch\", \"PublicKey = L2UoJZN7RmEKsMmqaJgKG0m1S2Zs2wd2ptAf+kb3008=\"] }"
+    )]
+    fn test_parse_no_allowed_ips() {
+        let _: PeerEntryHashMap = PeerEntryHashMap::try_from(TEXT_AIP).unwrap();
+    }
 }