我想从carbon-icons-svelte包导入一个图标到我的svelte组件。它在浏览器中工作得很好，但我无法测试这个组件。在导入碳图标之前，Testes工作良好。这是我的配置:
svelte.config.test.cjs
const preprocess = require('svelte-preprocess');
require('dotenv').config()
module.exports = {
preprocess: preprocess({
replace: [[/import.meta.env.([A-Z_]+)/, (importMeta) =>
{ return JSON.stringify(eval(importMeta.replace('import.meta', 'process')))} ]]
})
};
jest.config.cjs
const { pathsToModuleNameMapper } = require('ts-jest/utils');
const { compilerOptions } = require('./tsconfig.json');
module.exports = {
transform: {
'^.+\.svelte$': [
'svelte-jester',
{
preprocess: './svelte.config.test.cjs'
}
],
"^.+\.(js)$": "babel-jest",
'^.+\.(ts)$': [require.resolve('jest-chain-transform'),
{ transformers: ['../../../build-utils/importMetaTransformer.cjs', 'ts-jest'] }
]
},
testMatch: ["**/spec/**/*.js"],
moduleFileExtensions: ['js', 'ts', 'svelte'],
setupFilesAfterEnv: ['<rootDir>/jest-setup.ts'],
moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {prefix: '<rootDir>/'})
};
tsconfig.json
{
"compilerOptions": {
"moduleResolution": "node",
"module": "es2020",
"lib": ["es2020", "DOM"],
"target": "es2019",
"importsNotUsedAsValues": "error",
"allowSyntheticDefaultImports": true,
"isolatedModules": true,
"resolveJsonModule": true,
"sourceMap": true,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true,
"baseUrl": ".",
"allowJs": true,
"checkJs": true,
"paths": {
"$/*": ["src/*"]
}
},
"include": [
"src/**/*.d.ts",
"src/**/*.js",
"src/**/*.ts",
"src/**/*.svelte",
"src/**/*.svelte-kit",
"./jest-setup.ts"
],
"exclude": ["node_modules"]
}
我有一个关于jest错误的信息:
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.
• 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:
/home/dev/src/iroco-app-client/node_modules/carbon-icons-svelte/lib/Information32/Information32.svelte:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){<script>
^
SyntaxError: Unexpected token '<'
9 | import { createPopper } from '@popperjs/core';
10 | import Information32 from 'carbon-icons-svelte/lib/Information32/Information32.svelte';
> 11 |
| ^
我添加了jest.config.test.cjs
transformIgnorePatterns: ["<rootDir>/node_modules/(?!(carbon-icons-svelte))"]
在moduleNameMapper之后，但仍然不起作用。谢谢你的帮助。
在节点16上运行，我将我的Babel更改为CJS，它为我工作，这就是它的样子
module.export = {
presets: [['@babel/preset-env', { targets: { node: 'current' } }], '@babel/preset-typescript']
};
我jest.config.js
const config = {
testEnvironment: 'jsdom',
transform: {
'^.+\.js$': 'babel-jest',
'^.+\.ts$': 'ts-jest',
'^.+\.svelte$': ['svelte-jester', { preprocess: true }]
},
transformIgnorePatterns: [
'<rootDir>/node_modules/(?!(carbon-icons-svelte))',
'<rootDir>/node_modules/(?!(carbon-components-svelte))'
],
moduleFileExtensions: ['js', 'ts', 'svelte']
};
export default config;