如何用笑话/酵素获得渲染时间？(How to get the times of render with jest/enzyme?)

如何用笑话/酵素获得渲染时间？(How to get the times of render with jest/enzyme?)

喜欢这个：

const root = mount(...); expect(root.render.mock.calls.length).tobe(1);

like this:

const root = mount(...); expect(root.render.mock.calls.length).tobe(1);

最满意答案

另外嘲笑，由@Whj建议你可以间谍渲染。

const renderSpy = jest.spyOn(root.instance(), 'render'); root.instance().forceUpdate(); // Needed to bound spy to component's instance expect(renderSpy.mock.calls.length).toBe(1);

Additionaly to mocking, suggested by @Whj you can just spyOn render.

const renderSpy = jest.spyOn(root.instance(), 'render'); root.instance().forceUpdate(); // Needed to bound spy to component's instance expect(renderSpy.mock.calls.length).toBe(1);