Add test for Cluster keyword args

tests/integration/test_cluster.py

@@ -1,4 +1,5 @@
 import unittest
+from mock import Mock
 
 from cassandra.cluster import Cluster, NoHostAvailable
 
@@ -40,6 +41,25 @@ class ClusterTests(unittest.TestCase):
         cluster = Cluster(['127.1.2.9', '127.1.2.10'])
         self.assertRaises(NoHostAvailable, cluster.connect)
 
+    def test_init_kwargs(self):
+        def foo(*args, **kwargs):
+            return Mock()
+
+        for kw in ('auth_provider', 'load_balancing_policy_factory',
+                   'retry_policy_factory', 'conviction_policy_factory'):
+            kwargs = {kw: 123}
+            self.assertRaises(ValueError, Cluster, **kwargs)
+
+            kwargs = {kw: foo}
+            c = Cluster(**kwargs)
+            self.assertEquals(getattr(c, kw), foo)
+
+        for kw in ('contact_points', 'port', 'compression', 'metrics_enabled',
+                   'reconnection_policy', 'sockopts', 'max_schema_agreement_wait'):
+            kwargs = {kw: (1, 2, 3)}
+            c = Cluster(**kwargs)
+            self.assertEquals(getattr(c, kw), (1, 2, 3))
+
     def test_submit_schema_refresh(self):
         cluster = Cluster()
         cluster.connect()