可重复的仓库：https://github.com/hutber/cannotusestatement
更令人担忧的是：在sandbox中测试通过，但是如果你将上述仓库导入此sandbox，则无法在本地通过测试。
我毫不怀疑问题出在我的jest没有编译运行测试所需的node_modules。但现在我不知道该如何使其正常工作了。
我只想能够运行测试。它们目前无法运行。
测试
import React from 'react'
import { renderWithThemeProvider, screen } from 'test-utils'
import { Select } from './Select'
it('renders correctly', () => {
const tree = renderWithThemeProvider(<Select id="testSelect"></Select>)
expect(tree).toMatchSnapshot()
})
jest.config.js
module.exports = {
roots: ['<rootDir>', './src'],
moduleDirectories: ['<rootDir>', 'node_modules/', './src'],
transform: {
'^.+\\.(ts|tsx)$': 'ts-jest',
},
testEnvironment: 'jsdom',
testMatch: ['**/*.test.(ts|tsx)', '**/__tests__/*.(ts|tsx)'],
moduleNameMapper: {
// Mocks out all these file formats when tests are run
'\\.(jpg|ico|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$': 'identity-obj-proxy',
'\\.(css|less|scss|sass)$': 'identity-obj-proxy',
'app-config': '<rootDir>/app-config/default',
'^@components(.*)$': '<rootDir>/src/components$1',
'^@themes(.*)$': '<rootDir>/src/themes$1',
},
coverageThreshold: {
global: {
statements: 50,
},
},
}
babel.config.js
module.exports = {
presets: ['@babel/preset-env', '@babel/preset-react'],
env: {
test: {
presets: ['@babel/preset-env', '@babel/preset-react'],
plugins: [
[
'babel-plugin-transform-imports',
'@babel/plugin-proposal-class-properties',
'transform-es2015-modules-commonjs',
'babel-plugin-dynamic-import-node',
'babel-plugin-styled-components',
],
},
},
}
package.json
"test": "jest --watchAll=false",
yarn test
(base) hutber@hutber:/var/www/target/component-library$ yarn test src/components/Select/Select.test.tsx
yarn run v1.22.17
$ jest --watchAll=false src/components/Select/Select.test.tsx
FAIL src/components/Select/Select.test.tsx
● Test suite failed to run
Jest encountered an unexpected token
Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.
Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.
By default "node_modules" folder is ignored by transformers.
Here's what you can do:
• If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
• If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
• To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
• If you need a custom transformation specify a "transform" option in your config.
• If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.
You'll find more details and examples of these config options in the docs:
https://jestjs.io/docs/configuration
For information about custom transformations, see:
https://jestjs.io/docs/code-transformation
Details:
/var/www/target/component-library/node_modules/@mui/material/styles/styled.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { createStyled, shouldForwardProp } from '@mui/system';
^^^^^^
SyntaxError: Cannot use import statement outside a module
1 | import React from 'react'
> 2 | import styled from '@mui/material/styles/styled'
| ^
3 |
4 | import MuiSelect, { SelectProps as MuiSelectProps } from '@mui/material/Select'
5 | import InputLabel from '@mui/material/InputLabel'
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1728:14)
at Object.<anonymous> (src/components/Select/Select.tsx:2:1)
Test Suites: 1 failed, 1 total
Tests: 0 total
Snapshots: 0 total
Time: 3.272 s
import React from 'react'
import styled from '@mui/material/styles/styled'
import MuiSelect, { SelectProps as MuiSelectProps } from '@mui/material/Select'
import InputLabel from '@mui/material/InputLabel'
import MenuItem from '@mui/material/MenuItem'
import MuiFormControl from '@mui/material/FormControl'
interface ISelect extends MuiSelectProps {
id: string
label?: string
options?: { text: string; option: string }[]
}
const FormControl = styled(MuiFormControl)`
color: #fff;
border-radius: 30px;
width: 180px;
`
export const Select: React.FC<ISelect> = ({ label, id, children, options, ...props }) => {
return (
// @ts-ignore
<FormControl fullWidth hiddenLabel>
{label && (
<InputLabel id={`input_${id}`} shrink={false}>
{label}
</InputLabel>
)}
<MuiSelect id={id} {...props}>
{options && options.map(({ text, option }: { text: string; option: string }) => <MenuItem value={option}>{text}</MenuItem>)}
{children && children}
</MuiSelect>
</FormControl>
)
}
export default Select