Uses assert_called_with instead of called_with (#2375)

Author: Hirotaka Wakabayashi

test/test_client_async.py

@@ -220,12 +220,12 @@ def test_send(cli, conn):
     request = ProduceRequest[0](0, 0, [])
     assert request.expect_response() is False
     ret = cli.send(0, request)
-    assert conn.send.called_with(request)
+    conn.send.assert_called_with(request, blocking=False)
     assert isinstance(ret, Future)
 
     request = MetadataRequest[0]([])
     cli.send(0, request)
-    assert conn.send.called_with(request)
+    conn.send.assert_called_with(request, blocking=False)
 
 
 def test_poll(mocker):