def testAutoTransferCompressed(self):
    """Test that automatic transfers are compressed.

    Ensure uploads with the compressed, resumable, and automatic transfer
    flags set call StreamInChunks. StreamInChunks is tested in an earlier
    test.
    """
    # Create the upload object.
    upload = transfer.Upload(
        stream=self.sample_stream,
        mime_type='text/plain',
        total_size=len(self.sample_data),
        close_stream=False,
        gzip_encoded=True)
    upload.strategy = transfer.RESUMABLE_UPLOAD
    # Mock the upload to return the sample response.
    with mock.patch.object(transfer.Upload,
                           'StreamInChunks') as mock_result, \
            mock.patch.object(http_wrapper,
                              'MakeRequest') as make_request:
        mock_result.return_value = self.response
        make_request.return_value = self.response

        # Initialization.
        upload.InitializeUpload(self.request, 'http')
        # Ensure the mock was called.
        self.assertTrue(mock_result.called)