所以我试图在我的项目中第一次运行开玩笑,并且遇到了一些令人困惑的错误。
运行path/config/polyfills.js: Property object of MemberExpression expected node to be of a type ["Expression"] but instead got null
时得到npm test
,我的脚本如下所示:"test": "node scripts/test.js --env=jsdom"
。
这也是我的polyfills.js
:
'use strict';
if (typeof Promise === 'undefined') {
// Rejection tracking prevents a common issue where React gets into an
// inconsistent state due to an error, but it gets swallowed by a Promise,
// and the user has no idea what causes React's erratic future behavior.
require('promise/lib/rejection-tracking').enable();
window.Promise = require('promise/lib/es6-extensions.js');
}
// fetch() polyfill for making API calls.
require('whatwg-fetch');
// Object.assign() is commonly used with React.
// It will use the native implementation if it's present and isn't buggy.
Object.assign = require('object-assign');
// In tests, polyfill requestAnimationFrame since jsdom doesn't provide it yet.
// We don't polyfill it in the browser--this is user's responsibility.
if (process.env.NODE_ENV === 'test') {
require('raf').polyfill(global);
}
我的package.json
:
"jest": {
"collectCoverageFrom": [
"src/**/*.{js,jsx,mjs}"
],
"setupFiles": [
"<rootDir>/config/polyfills.js"
],
"testMatch": [
"<rootDir>/src/**/__tests__/**/*.{js,jsx,mjs}",
"<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs}"
],
"testEnvironment": "node",
"testURL": "http://localhost",
"transform": {
"^.+\\.(js|jsx|mjs)$": "<rootDir>/node_modules/babel-jest",
"^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
"^(?!.*\\.(js|jsx|mjs|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
},
"transformIgnorePatterns": [
"[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs)$"
],
"moduleNameMapper": {
"^react-native$": "react-native-web"
},
"moduleFileExtensions": [
"web.js",
"js",
"json",
"web.jsx",
"jsx",
"node",
"mjs"
]
}
这是我第一次使用玩笑,所以我不太熟悉如何设置配置:-(
非常感谢我能提供的帮助!