reactjs - Jest - 在 React 中测试模态会出错

Question

我正在使用 react-test-renderer用 Jest 来测试 React 组件。但是，如果我像这样测试 react-mui 模态对话框:

describe('Dashboard', function () {
  let dashboard;
  beforeEach(async () => {
    testRenderer = TestRenderer.create(<MemoryRouter><Route component={Dashboard} /></MemoryRouter>);
    dashboard = testRenderer.root.findByType(Dashboard);
    await waitForExpect(() => expect(dashboard.instance.state.hasLoaded).toBeTruthy());
  });


  it('opens dialog on clicking the new class', async () => {
    const button = testRenderer.root.findByType(Button);
    expect(dashboard.instance.state.showDialog).toBeFalsy();
    button.props.onClick();
    expect(dashboard.instance.state.showDialog).toBeTruthy();
  });
});

但是，然后我收到一个错误:

Error: Failed: "Error: Uncaught 'Warning: An invalid container has been provided. This may indicate that another renderer is being used in addition to the test renderer. (For example, ReactDOM.createPortal inside of a ReactTestRenderer tree.) This is not supported.%s'

我应该如何测试然后响应门户以使此测试有效？

Answer 1

尝试将其放入您的测试中:

beforeAll(() => {
    ReactDOM.createPortal = jest.fn((element, node) => {
        return element
    })
});