fix: resolve circular imports (#1942) · googleapis/google-auth-library-python@25c1b06

@@ -813,11 +813,12 @@ def test_no_env_vars_set(self):

813813814814815815class TestMtlsHelper:816+@mock.patch.object(_mtls_helper, "call_client_cert_callback")816817@mock.patch("google.auth.transport._mtls_helper._agent_identity_utils")817818def test_check_parameters_for_unauthorized_response_with_cached_cert(818-self, mock_agent_identity_utils819+self, mock_agent_identity_utils, mock_call_client_cert_callback819820 ):820-mock_agent_identity_utils.call_client_cert_callback.return_value = (821+mock_call_client_cert_callback.return_value = (821822CERT_MOCK_VAL,822823KEY_MOCK_VAL,823824 )

@@ -841,16 +842,17 @@ def test_check_parameters_for_unauthorized_response_with_cached_cert(

841842assert key == KEY_MOCK_VAL842843assert cached_fingerprint == "cached_fingerprint"843844assert current_fingerprint == "current_fingerprint"844-mock_agent_identity_utils.call_client_cert_callback.assert_called_once()845+mock_call_client_cert_callback.assert_called_once()845846mock_agent_identity_utils.get_cached_cert_fingerprint.assert_called_once_with(846847b"cached_cert_bytes"847848 )848849849-@mock.patch("google.auth.transport._mtls_helper._agent_identity_utils")850+@mock.patch.object(_mtls_helper, "call_client_cert_callback")851+@mock.patch.object(_mtls_helper, "_agent_identity_utils")850852def test_check_parameters_for_unauthorized_response_without_cached_cert(851-self, mock_agent_identity_utils853+self, mock_agent_identity_utils, mock_call_client_cert_callback852854 ):853-mock_agent_identity_utils.call_client_cert_callback.return_value = (855+mock_call_client_cert_callback.return_value = (854856CERT_MOCK_VAL,855857KEY_MOCK_VAL,856858 )

@@ -869,5 +871,22 @@ def test_check_parameters_for_unauthorized_response_without_cached_cert(

869871assert key == KEY_MOCK_VAL870872assert cached_fingerprint == "current_fingerprint"871873assert current_fingerprint == "current_fingerprint"872-mock_agent_identity_utils.call_client_cert_callback.assert_called_once()874+mock_call_client_cert_callback.assert_called_once()873875mock_agent_identity_utils.get_cached_cert_fingerprint.assert_not_called()876+877+@mock.patch("google.auth.transport._mtls_helper.get_client_ssl_credentials")878+def test_call_client_cert_callback(self, mock_get_client_ssl_credentials):879+mock_get_client_ssl_credentials.return_value = (880+True,881+b"cert_bytes",882+b"key_bytes",883+b"passphrase",884+ )885+886+cert, key = _mtls_helper.call_client_cert_callback()887+888+assert cert == b"cert_bytes"889+assert key == b"key_bytes"890+mock_get_client_ssl_credentials.assert_called_once_with(891+generate_encrypted_key=True892+ )