Merge pull request #29 from robgonnella/add-network-tests

[r-lanlib]: adds network tests

r-lanlib/src/network.rs

@@ -82,3 +82,52 @@ fn get_interface_ipv4_and_cidr(interface: &PNetNetworkInterface) -> Option<(Stri
     let cidr = String::from(format!("{base}/{prefix}"));
     Some((ip, cidr))
 }
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    #[test]
+    fn returns_none_for_bogus_interface_name() {
+        let res = get_interface("noop");
+        assert!(res.is_none());
+    }
+
+    #[cfg(target_os = "macos")]
+    #[test]
+    fn returns_interface_by_name() {
+        let res = get_interface("en0");
+        assert!(res.is_some());
+    }
+
+    #[cfg(target_os = "linux")]
+    #[test]
+    fn returns_interface_by_name() {
+        let res = get_interface("eth0");
+        assert!(res.is_some());
+    }
+
+    #[test]
+    fn returns_default_interface() {
+        let res = get_default_interface();
+        assert!(res.is_some());
+    }
+
+    #[test]
+    fn returns_an_available_port_on_system() {
+        let res = get_available_port();
+        assert!(res.is_ok());
+    }
+
+    #[test]
+    fn get_ip_and_cidr_from_interface() {
+        let iface = pnet::datalink::interfaces()
+            .into_iter()
+            .find(|e| e.is_up() && !e.is_loopback() && e.ips.iter().find(|i| i.is_ipv4()).is_some())
+            .unwrap();
+        let (ip, cidr) = get_interface_ipv4_and_cidr(&iface).unwrap();
+        assert!(!ip.is_empty());
+        assert!(!cidr.is_empty());
+    }
+}