TypeError：无法读取未定义的属性“cwd”

Posted 2023-03-08

【中文标题】TypeError：无法读取未定义的属性“cwd”

【英文标题】：TypeError: Cannot read property 'cwd' of undefined

【发布时间】：2019-07-09 12:16:21

【问题描述】：

我正在使用 jest 和 react-testing-library 编写测试用例 当我运行我的测试脚本时，它会引发如下错误

TypeError: Cannot read property 'cwd' of undefined

现在我已经尝试了几乎所有方法来解决这个问题，但没有找到原因

我尝试更改配置，即使我已经使用 --no-cache 运行，但它再次抛出 同样的错误

这是我的配置文件

const  defaults  = require("jest-config");

module.exports = 
    testEnvironment: "node",
    // setupFiles: [
    //     "<rootDir>/../apollo-server-env/dist/index.js"
    // ],
    preset: "ts-jest",
    testMatch: null,
    testRegex: ".*test*\\.(ts|tsx|js)$",
    testPathIgnorePatterns: [
        "/node_modules/",
        "/dist/"
    ],
    transform: 
        "\\.(gql|graphql)$": "jest-transform-graphql",
        "\\.(ts|tsx)$": "ts-jest",
        // Use our custom transformer only for the *.js and *.jsx files
        "\\.(js|jsx)?$": "./transform.js",
        // future need to test with
        //  "^.+\\.(js|jsx|ts|tsx)$": "./transform.js",
        // ".+\\.(css|styl|less|sass|scss)$": "jest-css-modules-transform"
    ,
    roots: [
        "packages",
        "packages-modules",
        "servers"
    ],
    moduleFileExtensions: [...defaults.moduleFileExtensions,
        "ts",
        "tsx",
        "js",
        "gql",
        "graphql"],
    moduleNameMapper: 
        '^__mocks__/(.*)$': '<rootDir>/../../__mocks__/$1',
        // This regex should match the packages that we want compiled from source
        // through `ts-jest`, as opposed to loaded from their output files in
        // `dist`.
        // We don't want to match `apollo-server-env` and
        // `apollo-engine-reporting-protobuf`, because these don't depend on
        // compilation but need to be initialized from as parto of `prepare`.
        '^(?!apollo-server-env|apollo-engine-reporting-protobuf)(apollo-(?:server|datasource|cache-control|tracing|engine)[^/]*|graphql-extensions)(?:/dist)?((?:/.*)|$)': '<rootDir>/../../packages/$1/src$2'
    ,
    transformIgnorePatterns: [
        "/node_modules/(?!(@vscode)/).*/"
    ],
    clearMocks: true,
    globals: 
        __BACKEND_URL__: 'http://localhost:3010',
        __GRAPHQL_URL__: 'http://localhost:8085/graphql',
        /*"ts-jest": 
            tsConfig: "<rootDir>/tsconfig.json",
            //https://github.com/kulshekhar/ts-jest/issues/766,
            "diagnostics": 
                "warnOnly": true
            ,
            "babelConfig": true
        */
    
;```

Here is my test file 

`import * as React from 'react';
import render, cleanup from 'react-testing-library';
import EditorComponent from '../components/editor/editor-component';
import  Provider  from 'react-fela';
import  createRenderer  from 'fela';
import 'jest';
import 'jest-dom/extend-expect';
import  MockedProvider  from 'react-apollo/test-utils';
import FILE_CONTENT_QUERY from '../../../files-graphql-client/src/queries/index';

const mocks = [
    request: 
        query : FILE_CONTENT_QUERY,
    ,
    result: 
        data: 
            'getReleaseNotes': ,
        ,
    ,
];

describe('<EditorComponent/>', () => 

    let componentObj, felaRenderer, props = 
        subscriber: jest.fn(),
        saveDelayFileChangesMutation: jest.fn(),
        loadFileContent: function () 
          return  new Promise(function(resolve) 
              setTimeout(function() 
                  resolve(data: loadFileContent: 
                              'loadFileContent': ,
                          );
              , 300);
          );
        ,
        openingFiles: [
            value : 'test',
            encoding: 'utf-8',
            oldValue : 'oldTest',
            deleted : false,
            addIgnore : 'test',
            editorId : 1,
            markdown: false,
            preview : true,
            preOpen : false,
            keepOpen : true,
            status : 'test',
            oversize : false,
            changed : true,
            changedEvent: ,
            diff : true,
            size : 25,
        ] as IContent[],
        allSave: false,
        rootPath: '',
        change: jest.fn(),
        actions: [],
        doneSaveAll: jest.fn(),
        changeEditorSubscribes: jest.fn(),
        updateEditorContent: jest.fn(),
        openDiffEditor: jest.fn(),
        closeConflicts: jest.fn(),
        closeEditor: jest.fn(),
        updateChangedContent: jest.fn(),
        setFinderOptions: jest.fn(),
        onOpenFile: jest.fn(),
        styles: ,
        subscribeToMore: jest.fn(),
    ;

    beforeEach(() => 
        felaRenderer = createRenderer();
        componentObj = render(<MockedProvider mocks=mocks><Provider renderer=felaRenderer><EditorComponent ...props/></Provider></MockedProvider>);
    );

    afterEach(cleanup);

);`

【问题讨论】：

通常从错误信息中获取错误所在的文件名和行号。当您没有显示任何尝试访问 cwd 的代码时，很难猜测发生了什么。因此，也许您可​​以发布完整的错误消息并发布引发错误的代码部分。

【参考方案1】：

我遇到了同样的问题，原因是babel-jest 已经升级到最新版本，而没有升级其余与 jest 相关的模块：

"babel-jest": "^26.6.3",
"jest": "^23.6.0",

在我的情况下，将 jest 升级到最新版本解决了这个问题：

"babel-jest": "^26.6.3",
"jest": "^26.6.3",

【参考方案2】：

只需安装旧版本的 babel-jest：22。 无需更改 jest 的版本，可以使用最新版本。 最新版本的 babel-jest 会产生问题

npm install --save-dev babel-jest@22.4.3

【参考方案3】：

问题可能出在“babel-jest”模块的版本上。尝试使用“jest”模块将其连接起来。 这些是我在 package.json 中的依赖项： ... "babel-jest": "^23", “笑话”：“22.4.3”， ...