def setUp(self):
    # Sample highly compressible data.
    self.sample_data = b'abc' * 200
    # Stream of the sample data.
    self.sample_stream = six.BytesIO(self.sample_data)
    # Sample url_builder.
    self.url_builder = base_api._UrlBuilder('http://www.uploads.com')
    # Sample request.
    self.request = http_wrapper.Request(
        'http://www.uploads.com',
        headers={'content-type': 'text/plain'})
    # Sample successful response.
    self.response = http_wrapper.Response(
        info={'status': http_client.OK,
              'location': 'http://www.uploads.com'},
        content='',
        request_url='http://www.uploads.com',)
    # Sample failure response.
    self.fail_response = http_wrapper.Response(
        info={'status': http_client.SERVICE_UNAVAILABLE,
              'location': 'http://www.uploads.com'},
        content='',
        request_url='http://www.uploads.com',)