network.id should look for attrs "Id" and "id"...

...before falling back to a synthetic id based on the hash of the
network name.

Checking both is needed to support the Docker-compatible format ("Id")
and Libpod-native format ("id").

This is analagous to how podman-py handles network.name -- we check
attrs "Name" and "name" in that order.

Fixes #584

Author: Nicolas Lacasse

podman/domain/networks.py

@@ -30,9 +30,12 @@ class Network(PodmanResource):
     @property
     def id(self):  # pylint: disable=invalid-name
         """str: Returns the identifier of the network."""
-        with suppress(KeyError):
+        if "Id" in self.attrs:
             return self.attrs["Id"]
 
+        if "id" in self.attrs:
+            return self.attrs["id"]
+
         with suppress(KeyError):
             sha256 = hashlib.sha256(self.attrs["name"].encode("ascii"))
             return sha256.hexdigest()

podman/tests/integration/test_networks.py

@@ -64,6 +64,13 @@ def test_network_crud(self):
             names = [i.name for i in nets]
             self.assertIn("integration_test", names)
 
+        with self.subTest("Get by ID"):
+            network = self.client.networks.get("integration_test")
+            net_id = network.id
+            assert isinstance(net_id, str)
+            network_by_id = self.client.networks.get(net_id)
+            self.assertEqual(network.name, network_by_id.name)
+
         with self.subTest("Delete network"):
             network = self.client.networks.get("integration_test")
             network.remove(force=True)