【发布时间】:2020-06-30 09:10:29
【问题描述】:
尝试为组件库设置测试。我已经尝试了许多示例和所有类似的线程,但没有运气。
我的 setupTests.ts 文件正在正确加载(通过 console.log 证明),并且该库似乎可用,就像我添加 import { toBeInTheDocument } from '@testing-library/jest-dom/matchers' 并记录 toBeInTheDocument 它存在一样。
我也尝试了expect.extend({ toBeInTheDocument }) 选项,不幸的是仍然出现同样的错误。
以下是我的文件,我缺少什么?谢谢
// package.json
"devDependencies": {
"@testing-library/jest-dom": "^5.11.0",
"@testing-library/react": "^10.4.3",
"@types/testing-library__jest-dom": "^5.9.1",
"@types/testing-library__react": "^10.2.0",
"@types/jest": "24.0.15",
"jest": "^26.1.0",
"ts-jest": "^26.1.1",
}
// jest.config.js
module.exports = {
preset: 'ts-jest',
// The root of your source code, typically /src
// `<rootDir>` is a token Jest substitutes
roots: ['<rootDir>/src'],
// Jest transformations -- this adds support for TypeScript
// using ts-jest
transform: {
'^.+\\.tsx?$': 'ts-jest'
},
testEnvironment: 'jsdom',
// Runs special logic, such as cleaning up components
// when using React Testing Library and adds special
// extended assertions to Jest
setupFilesAfterEnv: ['<rootDir>/setupTests.ts'],
// // A map from regular expressions to module names that allow to stub out resources with a single module
moduleNameMapper: {
'@core': '<rootDir>/src/core',
'@hooks': '<rootDir>/src/hooks',
'@components': '<rootDir>/src/components'
},
// Test spec file resolution pattern
// Matches parent folder `__tests__` and filename
// should contain `test` or `spec`.
testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
// Module file extensions for importing
moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']
}
// tsconfig
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"lib": ["esnext", "dom", "dom.iterable"],
"jsx": "react",
"types": ["react", "jest"],
"outDir": "./dist",
"baseUrl": "src",
"paths": {
"@core": ["core"],
"@core/*": ["core/*"],
"@components": ["components"],
"@components/*": ["components/*"],
"@hooks": ["hooks"],
"@hooks/*": ["hooks/*"]
},
"sourceMap": true,
"declaration": true,
"noImplicitAny": true,
"strict": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"experimentalDecorators": true
},
"include": ["src", "setupTests.ts"],
"exclude": ["dist", "node_modules"]
}
// myproject/setupTests.ts
import '@testing-library/jest-dom/extend-expect'
// src/components/container/__tests__/container.spec.tsx
import * as React from 'react'
import { render } from '@testing-library/react'
import { Container } from '../Container'
describe('<Container />', () => {
test('renders', async () => {
expect(true).toBe(true)
const { getByText } = render(<Container>mad</Container>)
// NOTE: not even my TS is happy
// Property 'toBeInTheDocument' does not exist on type 'Matchers<HTMLElement>'
expect(getByText('mad')).toBeIntheDocument()
})
})
错误:
FAIL src/components/Container/__tests__/container.spec.tsx
<Container />
✕ renders (28 ms)
● <Container /> › renders
TypeError: expect(...).toBeIntheDocument is not a function
编辑: Vlad 的评论是正确的,我的错误是愚蠢的。虽然现在测试运行没有任何错误,但 VSCode 仍然抱怨它。
Property 'toBeInTheDocument' does not exist on type 'Matchers<HTMLElement>'
我发现将“testing-library__jest-dom”添加到 tsconfig “types” 似乎可以抑制错误,将鼠标悬停在 any 类型的函数上,我无法跳转到函数的定义“未找到定义对于“toBeInTheDocument”。
关于为什么没有加载类型定义的任何想法?
【问题讨论】:
-
toBeInTheDocument不是toBeIntheDocument确保您没有拼写错误 -
@Rostyslav 对不起?你重复了两次相同的字符串,所以我很困惑?
-
相同但不同但仍然相同:)
The应大写 -
@Rostyslav ARGH 天哪,大脑爆炸了。我完成了这一天。
-
这个问题是特定于 TS 的。通常,您可能希望为 prod 和测试提供单独的 TS 配置,而 prod 中没有 Jest、Node 等类型。从通用配置中扩展它们并仅在产品中使用
types,如果没有明确指定types,测试配置将自动从@types 中选择所有类型。仍然不确定为什么添加“testing-library__jest-dom”不起作用。
标签: reactjs typescript jestjs react-testing-library jest-dom