Mar*_*iro 3 testing unit-testing reactjs enzyme
假设我有以下React组件:
import React from 'react'
import AppBar from 'material-ui/lib/app-bar'
class NavBar extends React.Component {
render () {
return (
<div>
<AppBar
title='My NavBar Title'
/>
</div>
)
}
}
export default NavBar
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我想设置一个测试,以确保用户在渲染时看到一个材料-ui AppBarNavBar,使用Tape和Enzyme:
import NavBar from './NavBar'
import React from 'react'
import test from 'tape'
// import { I don't know exactly what to import here. Maybe `shallow`? } from 'enzyme'
test('NavBar component test', (assert) => {
test('I should see an AppBar', (assert) => {
// How can I test for it?
// Also, can I test only for the presence of `AppBar`, without
// necessarily for the overriding of props? For example,
// even if I actually have <AppBar title='My NavBar title' />,
// can I test only for `AppBar`?
assert.end()
})
assert.end()
})
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我怎么能正确地做到这一点?
Mar*_*iro 12
我知道了.它是:
test('I should see one AppBar', (assert) => {
const wrapper = shallow(<NavBar />)
assert.equal(wrapper.find('AppBar').length === 1, true)
assert.end()
})
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在shallow从功能enzyme返回其具有方法的包装find.find返回具有该属性的对象length.如果AppBar我的组件中有两个s,length则等于2,所以我可以测试它=== 1以完成我的测试.
我没有使用胶带和酶,但根据我的理解,这个问题与React测试工具更相关。
无论如何,工具都有方法:https://facebook.github.io/react/docs/test-utils.html#findallinrenderedtree
您可以使用它来查看组件是否像这样渲染:
const u = require('react-addons-test-utils');
const hasAppBar = u.findAllInRenderedTree(NavBar, (component) => {
return u.isCompositeComponentWithType(component, AppBar);
});
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只需确保 AppBar 确实是您正在搜索的组件的显示名称。
您将返回与谓词匹配的组件数组,因此您可以检查长度是否> 0。
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