def testMultipartCompressed(self):
    """Test that multipart uploads are compressed."""
    # Create the multipart configuration.
    upload_config = base_api.ApiUploadInfo(
        accept=['*/*'],
        max_size=None,
        simple_multipart=True,
        simple_path=u'/upload',)
    # 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)
    # Set a body to trigger multipart configuration.
    self.request.body = '{"body_field_one": 7}'
    # Configure the request.
    upload.ConfigureRequest(upload_config, self.request, self.url_builder)
    # Ensure the request is a multipart request now.
    self.assertEqual(
        self.url_builder.query_params['uploadType'], 'multipart')
    # Ensure the request is gzip encoded.
    self.assertEqual(self.request.headers['Content-Encoding'], 'gzip')
    # Ensure data is compressed
    self.assertLess(len(self.request.body), len(self.sample_data))
    # Ensure uncompressed data includes the sample data.
    with gzip.GzipFile(fileobj=self.request.body) as f:
        original = f.read()
        self.assertTrue(self.sample_data in original)