How to use the jest/vue_shared/components/issue/related_issuable_mock_data.defaultProps.endpoint function in jest

it('displays a message from the backend upon error', () => {
        const input = '#123';
        const message = 'error';

        mock.onPost(defaultProps.endpoint).reply(409, { message });
        wrapper.vm.store.setPendingReferences([issuable1.reference, issuable2.reference]);

        expect(createFlash).not.toHaveBeenCalled();
        wrapper.vm.onPendingFormSubmit(input);

        return waitForPromises().then(() => {
          expect(createFlash).toHaveBeenCalledWith({
            message,
          });
        });
      });
    });

beforeEach(() => {
    mock = new MockAdapter(axios);
    mock.onGet(defaultProps.endpoint).reply(200, []);
  });