使用酶进行JS单元测试:如何在继续测试用例之前等待组件方法中的setState完成

it('should update state correctly', () => {
  const wrapper = shallow(<MyComponent />);
  wrapper.instance().myMethod();
  expect(wrapper.state('myState')).toBe('expectedValue');
});

it('should update state correctly', (done) => {
  const wrapper = shallow(<MyComponent />);
  wrapper.instance().myMethod();
  setImmediate(() => {
    expect(wrapper.state('myState')).toBe('expectedValue');
    done();
  });
});

it('should update state correctly', async () => {
  const wrapper = shallow(<MyComponent />);
  wrapper.instance().myMethod();
  await new Promise(resolve => setImmediate(resolve));
  expect(wrapper.state('myState')).toBe('expectedValue');
});

it('should update state correctly', () => {
  const wrapper = shallow(<MyComponent />);
  wrapper.instance().myMethod();
  wrapper.update();
  expect(wrapper.state('myState')).toBe('expectedValue');
});