我正试图在现有的React Native项目上设置测试。当我使用Jest运行测试时，测试会以下列错误弹出。
Test suite failed to run
...etc/__app__/node_modules/react-native/Libraries/polyfills/error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
^^^^^^^^^^^^
SyntaxError: Unexpected identifier
at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:537:17)
at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:579:25)
at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)
意外的标识符是以下内容。
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow strict
* @polyfill
*/
let _inGuard = 0;
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
我猜测这个问题与分离的问题有关。React和Flow预设.
node_modules中的代码，有Flowtype语法。我的Babel配置适用于我自己的代码，但不适用于node_modules中的文件。
我的babel.config.js。
presets: ['module:metro-react-native-babel-preset', "@babel/preset-flow", "@babel/plugin-transform-flow-strip-types"],
};
我的Jest package. json:
"jest": {
"verbose": true,
"preset": "react-native",
"transformIgnorePatterns": [
"node_modules/(?!react-native|@tableflip/react-native-navbar)",
"/node_modules/(?!@babel/runtime)",
"node_modules/(?!(react-native|__app__|react-native-button)/)",
"/node_modules/(?!react-native)/.+"
],
"setupFilesAfterEnv": [
"<rootDir>/node_modules/riteway-jest/src/riteway-jest.js"
]
},
我怎样才能阻止我的测试在Node Modules的Flow类型上爆炸？
编辑：完整的package.Json
{
"name": "ReactNativeTest",
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"start:ios": "react-native run-ios && react-native log-ios",
"start:android": "react-native run-android && react-native log-android",
"start:ios:debug": "react-native run-ios --simulator=\"iPhone X\" & open \"rndebugger://set-debugger-loc?host=localhost&port=8081\"",
"start:android:debug": "react-native run-android & open \"rndebugger://set-debugger-loc?host=localhost&port=8081\"",
"start:debug": "open \"rndebugger://set-debugger-loc?host=localhost&port=8081\"",
"lint": "standard",
"test": "jest"
},
"dependencies": {
"@babel/preset-env": "^7.8.4",
"@babel/runtime": "7.0.0-beta.55",
"@expo/react-native-action-sheet": "3.4.0",
"@react-native-community/async-storage": "1.6.3",
"@react-native-community/netinfo": "4.6.1",
"@react-native-community/viewpager": "3.3.0",
"babel-core": "^7.0.0-bridge.0",
"babel-preset-react-app": "^7.0.0",
"ejson": "2.2.0",
"lodash-es": "4.17.15",
"lodash.isstring": "4.0.1",
"markdown-it": "10.0.0",
"meteor-standalone-random": "1.0.67",
"moment": "2.24.0",
"prop-types": "15.7.2",
"react": "16.12.0",
"react-native": "0.61.5",
"react-native-calendar-events": "1.7.3",
"react-native-config": "0.11.7",
"react-native-dismiss-keyboard": "1.0.0",
"react-native-firebase": "5.6.0",
"react-native-hyperlink": "0.0.16",
"react-native-image-picker": "1.1.0",
"react-native-iphone-x-helper": "1.2.1",
"react-native-joi": "0.0.5",
"react-native-keyboard-aware-scroll-view": "0.9.1",
"react-native-keyboard-spacer": "0.4.1",
"react-native-maps": "0.26.1",
"react-native-onesignal": "3.5.0",
"react-native-scrollable-tab-view": "1.0.0",
"react-native-select-multiple": "2.1.0",
"react-native-side-menu": "1.1.3",
"react-native-swiper": "1.5.14",
"react-native-thumbnail-video": "0.1.2",
"react-native-touch-id": "4.4.1",
"react-native-uploadcare-image": "2.0.0",
"react-native-video": "5.0.2",
"react-native-webview": "7.5.2",
"react-redux": "7.1.3",
"reduce-reducers": "1.0.4",
"redux": "4.0.4",
"redux-devtools-extension": "2.13.8",
"redux-localstorage": "github:tableflip/redux-localstorage#fix-buffer-main-src",
"redux-localstorage-filter": "0.1.1",
"redux-thunk": "2.3.0",
"url": "0.11.0",
"uuid": "3.3.3"
},
"jest": {
"verbose": true,
"preset": "react-native",
"transformIgnorePatterns": [
"<rootDir>/node_modules/(?!@babel/runtime)",
"<rootDir>node_modules/(?!(react-native|__app__|react-native-button)/)",
"/node_modules/(?!react-native)/.+",
"/node_modules/"
],
"setupFilesAfterEnv": [
"<rootDir>/src/riteway-jest.js"
]
},
"devDependencies": {
"@babel/core": "^7.7.4",
"@babel/plugin-transform-flow-strip-types": "^7.8.3",
"@babel/plugin-transform-runtime": "^7.8.3",
"@babel/preset-flow": "^7.8.3",
"babel-eslint": "10.0.3",
"babel-jest": "^24.9.0",
"babel-plugin-import-rename": "1.0.1",
"jest": "24.9.0",
"jetifier": "1.6.4",
"metro-react-native-babel-preset": "0.57.0",
"react-native-config-node": "0.0.2",
"react-test-renderer": "16.12.0",
"redux-mock-store": "1.5.3",
"riteway-jest": "^2.0.2",
"standard": "14.3.1"
},
"standard": {
"parser": "babel-eslint",
"globals": [
"fetch",
"FormData",
"it",
"expect"
]
},
"transform": {
"^.+\\.[t|j]sx?$": "babel-jest"
}
}
有问题的是 忽略模式 在 软件包.json.不需要在其中添加项目数量，只需要按照这个模式来添加模块到黑名单。
"transformIgnorePatterns": [
"node_modules/(?!MODULE_NAME_1|MODULE_NAME_2)/"
],
从你的错误来看，我们需要在黑名单中添加 原生 到 忽略模式. 其实，我们需要把那些在黑名单中抛出错误的模块全部添加进去，因为大部分模块都不是完全用JS写的。
最后在我的案例中 诨 在 软件包.json 是
"jest": {
"preset": "react-native",
"transformIgnorePatterns": [
"node_modules/(?!react-native-payfort-sdk|react-native)/"
],
"globals": {
"__DEV__": true
},
"testEnvironment": "node"
}
这对我来说是有效的，希望这也能帮助你。