test: add basic test to validate that we can parse .netrc files properly (#503)

Author: mariusvniekerk

crates/rattler_networking/src/authentication_storage/backends/netrc.rs

@@ -98,3 +98,66 @@ impl StorageBackend for NetRcStorage {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::io::Write;
+    use tempfile::tempdir;
+
+    #[test]
+    fn test_file_storage() {
+        let file = tempdir().unwrap();
+        let path = file.path().join(".testnetrc");
+
+        let mut netrc = std::fs::File::create(&path).unwrap();
+        netrc
+            .write_all(b"machine test\nlogin test\npassword password\n")
+            .unwrap();
+        netrc.flush().unwrap();
+
+        let storage = NetRcStorage::from_path(path.as_path()).unwrap();
+        assert_eq!(
+            storage.get("test").unwrap(),
+            Some(Authentication::BasicHTTP {
+                username: "test".to_string(),
+                password: "password".to_string(),
+            })
+        );
+
+        assert_eq!(storage.get("test_unknown").unwrap(), None);
+    }
+
+    #[test]
+    fn test_file_storage_from_env() {
+        let file = tempdir().unwrap();
+        let path = file.path().join(".testnetrc2");
+
+        let mut netrc = std::fs::File::create(&path).unwrap();
+        netrc
+            .write_all(b"machine test2\nlogin test2\npassword password2\n")
+            .unwrap();
+        netrc.flush().unwrap();
+
+        let old_netrc = env::var("NETRC");
+        env::set_var("NETRC", path.as_os_str());
+
+        let storage = NetRcStorage::from_env().unwrap();
+
+        assert_eq!(
+            storage.get("test2").unwrap(),
+            Some(Authentication::BasicHTTP {
+                username: "test2".to_string(),
+                password: "password2".to_string(),
+            })
+        );
+
+        assert_eq!(storage.get("test_unknown").unwrap(), None);
+
+        if let Ok(netrc) = old_netrc {
+            env::set_var("NETRC", netrc);
+        } else {
+            env::remove_var("NETRC");
+        }
+    }
+}