小编Art*_* Z.的帖子

我正在尝试测试类似的功能：

function foo() {
    return {
        key_a: "val_a",
        key_b: new Date()
};

如何为这种情况制作预期的测试对象？

const expectedObject = {
    key_a: "val_a",
    key_b: new Date()
}
expect(foo()).toEqual(expectedObject)?
- Expected
+ Received
- "key_b": 2019-01-23T14:04:03.060Z,
+ "key_b": 2019-01-23T14:04:03.061Z,

我正在尝试测试我的react组件的渲染,但是得到以下错误: 不变违例:_registerComponent(...):目标容器不是DOM元素. 如果我更改下面在document.body上渲染我的组件的位置,则不存在错误,如果此位置是某个div,并且在body中有一些id,则存在错误.

这是我的组件:

import React, {Component} from 'react';
{render} from 'react-dom';
import Demo from './demo/demo'
import Demo2 from  './demo2/demo2'
require('./app-styles.sass')

export class App extends Component {
render() {
    return (
           <div>
               <Demo2 />
               <Demo />
               <div>Hello jest from react</div>
           </div>
       );
   }
}
render(<App/>, document.getElementById('helloWorldRoot'));

测试这个组件:

import React from 'react'
import {shallow, mount} from 'enzyme'
import {App} from './app'

describe('base component', () => {
  it('renders as a div', () => {
    const application = shallow(<App />);
    expect(application).toMatchSnapshot();
  });
}); …

我正在尝试运行 android 模拟器，但不是成功，而是出现错误和滞后的 ui 错误：

handleCpuAcceleration: feature check for hvf
cannot add library /Library/Android/sdk/emulator/qemu/darwin-x86_64/lib64/vulkan/libvulkan.dylib: failed
added library /Library/Android/sdk/emulator/lib64/vulkan/libvulkan.dylib
cannot add library /Library/Android/sdk/emulator/qemu/darwin-x86_64/lib64/vulkan/libMoltenVK.dylib: failed
HVF error: HV_ERROR
qemu-system-x86_64: failed to initialize HVF: Invalid argument
Failed to open the hax module
No accelerator found.
qemu-system-x86_64: failed to initialize HAX: Operation not supported by device
added library /Library/Android/sdk/emulator/lib64/vulkan/libMoltenVK.dylib

我已经尝试了这篇文章Android Emulator 30.4.5 not working on MacOS 以及其他有关 stackoverflow 和 google 搜索结果的相关文章中推荐的所有步骤 ，但尚未成功。

Mac OS 大苏尔 11.2.3