我试图对带有酶和react-native-mock 的React Native 测试有一些基本的了解。
不包括在下面:mocha 的自定义编译器,以获得 babel 的好处。
我的代码如下:
Block.jsx
:
import React from 'react';
import {View} from 'react-native';
export default ({title, ui}) => (
<View>
Title: {title}
</View>
);
Block.test.js
import { shallow } from 'enzyme';
import { expect } from 'chai';
import {Block} from '../';
import React from 'react';
describe('<Block /> with props: title', () => {
it('should have correct props', () => {
expect(
shallow(<Block title="Something" />).props()
).to.deep.equal( {title:"Something"} );
});
it('should have correct title', () => {
expect(
shallow(<Block title="Something" />).text()
).to.equal( "Something" );
});
});
试验结果
摩卡命令:
mocha --compilers js:./test/support/compiler.js --require react-native-mock/mock --recursive **/test/*.test.js --watch
摩卡测试结果:
<Block /> with props: title
1) should have correct props
2) should have correct title
2 failing
1) <Block /> with props: title should have correct props <Text />:
AssertionError: expected { Object (children) } to equal { title: 'Something' }
+ expected - actual
{
- "children": [
- "Title: "
- "Something"
- ]
+ "title": "Something"
}
at Context.<anonymous> (components/test/Block.test.js:24:120)
2) <Block /> with props: title should have correct title <Text />:
AssertionError: expected '<View />' to equal 'Something'
+ expected - actual
-<View />
+Something
at Context.<anonymous> (components/test/Block.test.js:28:119)
意外行为
props()
似乎获得了正确的值,但格式与 api 描述的格式不同text()
不呈现节点textContent
,而是呈现字符串化标签“<View />
”
替代方案:props().children
给定组件:
import React from 'react';
import {View, Text} from 'react-native';
export default ({title, ui}) => (
<View>
<Text> The title...</Text>
{title}
</View>
);
props().children
是数组[<Text component instance>, "Something"]
所以下面的测试通过了:
it('should have correct props', () => {
expect(
shallow(<Block title="Something" />).props().children
).to.contain( "Something" );
});
问题
为什么酶 API 的行为与文档中描述的不同?
具体查看文档应该shallow(<Block title="Something" />).text()
等于:The title...Something
我做错了什么,还是我正在使用的技术之一?
编辑1:其他问题
html()
, render()
,update()
似乎也不适用于我的设置
编辑:React Native 目前仅适用shallow
于