async def test_get_empty_default_mediator(self):
    self.request.query = {}
    self.context.session = async_mock.CoroutineMock()
    with async_mock.patch.object(test_module.web, 'json_response') as json_response, async_mock.patch.object(test_module.MediationManager, 'get_default_mediator', async_mock.CoroutineMock(return_value=None)) as mock_mgr_get_default_record:
        (await test_module.get_default_mediator(self.request))
        json_response.assert_called_once_with({}, status=200)
async def test_get_empty_default_mediator(self):
    self.request.query = {}
    self.context.session = async_mock.CoroutineMock()
    with async_mock.patch.object(test_module.web, 'json_response') as json_response, async_mock.patch.object(test_module.MediationManager, 'get_default_mediator', async_mock.CoroutineMock(return_value=None)) as mock_mgr_get_default_record:
        (await test_module.get_default_mediator(self.request))
        json_response.assert_called_once_with({}, status=200)