def test_if_matches_success(self):
        return self.assertResponseCode(
            b"POST", b"/configuration/datasets", {u"primary": self.NODE_A},
            CREATED,
            additional_headers={
                IF_MATCHES_HEADER:
                [self.persistence_service.configuration_hash()]})
If an ``X-If-Configuration-Matches`` header is sent with a matching
dataset/ETHPy150Open ClusterHQ/flocker/flocker/control/test/test_httpapi.py/CreateDatasetTestsMixin.test_if_matches_success