Adding equality check for cluster_standalone.Cluster.

This is so we can make the list_zones()/list_clusters()
tests more generic and just check equality of outputs.

gcloud_bigtable/client.py

@@ -256,8 +256,9 @@ def list_clusters(self, timeout_seconds=TIMEOUT_SECONDS):
 
         :rtype: tuple
         :returns: A pair of results, the first is a list of
-                  :class:`.cluster_standalone.Cluster` s returned and the second
-                  is a list of strings (the failed zones in the request).
+                  :class:`.cluster_standalone.Cluster` s returned and the
+                  second is a list of strings (the failed zones in the
+                  request).
         """
         request_pb = messages_pb2.ListClustersRequest(name=self.project_name)
         stub = make_stub(self._credentials, CLUSTER_STUB_FACTORY,

gcloud_bigtable/cluster_standalone.py

@@ -102,3 +102,13 @@ def name(self):
         """
         return (self.client.project_name + '/zones/' + self.zone +
                 '/clusters/' + self.cluster_id)
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            return False
+        return (other.zone == self.zone and
+                other.cluster_id == self.cluster_id and
+                other.client == self.client)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)

gcloud_bigtable/test_cluster_standalone.py

@@ -116,3 +116,30 @@ def test_from_pb_project_id_mistmatch(self):
         klass = self._getTargetClass()
         with self.assertRaises(ValueError):
             klass.from_pb(cluster_pb, client)
+
+    def test___eq__(self):
+        zone = 'zone'
+        cluster_id = 'cluster_id'
+        client = object()
+        cluster1 = self._makeOne(zone, cluster_id, client)
+        cluster2 = self._makeOne(zone, cluster_id, client)
+        self.assertEqual(cluster1, cluster2)
+
+    def test___eq__type_differ(self):
+        cluster1 = self._makeOne('zone', 'cluster_id', 'client')
+        cluster2 = object()
+        self.assertNotEqual(cluster1, cluster2)
+
+    def test___ne__same_value(self):
+        zone = 'zone'
+        cluster_id = 'cluster_id'
+        client = object()
+        cluster1 = self._makeOne(zone, cluster_id, client)
+        cluster2 = self._makeOne(zone, cluster_id, client)
+        comparison_val = (cluster1 != cluster2)
+        self.assertFalse(comparison_val)
+
+    def test___ne__(self):
+        cluster1 = self._makeOne('zone1', 'cluster_id1', 'client1')
+        cluster2 = self._makeOne('zone2', 'cluster_id2', 'client2')
+        self.assertNotEqual(cluster1, cluster2)