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diff --git a/src/python/grpcio/tests/unit/_api_test.py b/src/python/grpcio/tests/unit/_api_test.py
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+++ b/src/python/grpcio/tests/unit/_api_test.py
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+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test of gRPC Python's application-layer API."""
+
+import unittest
+
+import six
+
+import grpc
+
+from tests.unit import _from_grpc_import_star
+
+
+class AllTest(unittest.TestCase):
+
+  def testAll(self):
+    expected_grpc_code_elements = (
+        'FutureTimeoutError',
+        'FutureCancelledError',
+        'Future',
+        'ChannelConnectivity',
+        'StatusCode',
+        'RpcError',
+        'RpcContext',
+        'Call',
+        'ChannelCredentials',
+        'CallCredentials',
+        'AuthMetadataContext',
+        'AuthMetadataPluginCallback',
+        'AuthMetadataPlugin',
+        'ServerCredentials',
+        'UnaryUnaryMultiCallable',
+        'UnaryStreamMultiCallable',
+        'StreamUnaryMultiCallable',
+        'StreamStreamMultiCallable',
+        'Channel',
+        'ServicerContext',
+        'RpcMethodHandler',
+        'HandlerCallDetails',
+        'GenericRpcHandler',
+        'Server',
+        'unary_unary_rpc_method_handler',
+        'unary_stream_rpc_method_handler',
+        'stream_unary_rpc_method_handler',
+        'stream_stream_rpc_method_handler',
+        'method_handlers_generic_handler',
+        'ssl_channel_credentials',
+        'metadata_call_credentials',
+        'access_token_call_credentials',
+        'composite_call_credentials',
+        'composite_channel_credentials',
+        'ssl_server_credentials',
+        'channel_ready_future',
+        'insecure_channel',
+        'secure_channel',
+        'server',
+    )
+
+    six.assertCountEqual(
+        self, expected_grpc_code_elements,
+        _from_grpc_import_star.GRPC_ELEMENTS)
+
+
+class ChannelConnectivityTest(unittest.TestCase):
+
+  def testChannelConnectivity(self):
+    self.assertSequenceEqual(
+        (grpc.ChannelConnectivity.IDLE,
+         grpc.ChannelConnectivity.CONNECTING,
+         grpc.ChannelConnectivity.READY,
+         grpc.ChannelConnectivity.TRANSIENT_FAILURE,
+         grpc.ChannelConnectivity.SHUTDOWN,),
+        tuple(grpc.ChannelConnectivity))
+
+
+class ChannelTest(unittest.TestCase):
+
+  def test_secure_channel(self):
+    channel_credentials = grpc.ssl_channel_credentials()
+    channel = grpc.secure_channel('google.com:443', channel_credentials)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)