SyntaxError: Cannot use import statement outside a module error is thrown while using mocha to run tests

Question

我的项目中的测试在我刚开始使用时运行良好，目前它们完全停止工作了。

每当我使用测试命令时，都会抛出以下错误：

~/node_modules/csv-writer/src/test/csv-stringifiers/array.test.ts:1
import {resolveDelimiterChar} from '../helper/delimiter';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at wrapSafe (internal/modules/cjs/loader.js:979:16)
    at Module._compile (internal/modules/cjs/loader.js:1027:27)
    at Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Object.require.extensions.<computed> [as .ts] (~/node_modules/ts-node/src/index.ts:1045:43)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.exports.requireOrImport (~/backend/node_modules/mocha/lib/esm-utils.js:20:12)
    at Object.exports.loadFilesAsync (~/node_modules/mocha/lib/esm-utils.js:33:34)
    at Mocha.loadFilesAsync (~/node_modules/mocha/lib/mocha.js:431:19)
    at singleRun (~/node_modules/mocha/lib/cli/run-helpers.js:125:15)
    at exports.runMocha (~/node_modules/mocha/lib/cli/run-helpers.js:190:10)
    at Object.exports.handler (~/node_modules/mo

抛出的这个错误让人觉得 csv-writer 模块似乎有问题，但我似乎无法找出问题的真正所在以及如何进行测试运行如果我不想删除这个包。

我的 package.json 文件：

...
  "scripts": {
    "test": "cross-env GENSCRIP_PORT=3001 && cross-env GENSCRIP_SECRET=xxxx && cross-env GENSCRIP_DB_URL=mongodb://xxxx/genscrip_dev && cross-env GENSCRIP_BE_ENV=development && cross-env GENSCRIP_FE_URL=http://xxxx/ && npm run test:run",
    "test:run": "mocha --require ts-node/register --watch-extensions ts './**/test/**/*.ts'",
    "coverage": "tsc && nyc --reporter=lcov npm run test",
    "start:dev": "nodemon --config nodemon.json ./src/index.ts",
    "start": "npm run build && npm run start:node",
    "start:node": "node ./dist/index.js",
    "dev:debug": "nodemon --config nodemon.json --inspect-brk ./src/index.ts",
    "build": "rimraf ./dist && tsc"
  },
...
"dependencies": {
    "@elastic/elasticsearch": "^7.11.0",
    "@types/cors": "^2.8.9",
    "@types/nodemailer": "^6.4.0",
    "@types/nodemailer-direct-transport": "^1.0.31",
    "@types/nodemailer-smtp-transport": "^2.7.4",
    "@types/uuid": "^8.3.0",
    "bcryptjs": "^2.4.3",
    "body-parser": "^1.19.0",
    "cors": "^2.8.5",
    "csv-parser": "^3.0.0",
    "csv-writer": "^1.6.0",
    "express": "^4.17.1",
    "fuzzball": "^1.3.1",
    "fuzzy": "^0.1.3",
    "helmet": "^4.4.1",
    "inversify": "^5.0.5",
    "jsonwebtoken": "^8.5.1",
    "moment": "^2.29.1",
    "mongoose": "^5.11.10",
    "morgan": "^1.10.0",
    "nodemailer": "^6.4.18",
    "uuid": "^8.3.2"
  },
  "devDependencies": {
    "@istanbuljs/nyc-config-typescript": "^1.0.1",
    "@tsconfig/node12": "^1.0.7",
    "@types/bcryptjs": "^2.4.2",
    "@types/chai": "^4.2.14",
    "@types/express": "^4.17.9",
    "@types/jsonwebtoken": "^8.5.0",
    "@types/mocha": "^8.2.0",
    "@types/mongoose": "^5.10.3",
    "@types/morgan": "^1.9.2",
    "@types/node": "^14.14.37",
    "@types/sinon": "^9.0.10",
    "chai": "^4.2.0",
    "cross-env": "^7.0.3",
    "mocha": "^8.2.1",
    "nodemon": "^2.0.4",
    "nyc": "^15.1.0",
    "reflect-metadata": "^0.1.13",
    "rimraf": "^3.0.2",
    "sinon": "^9.2.4",
    "source-map-support": "^0.5.19",
    "ts-node": "^9.1.1",
    "tslint": "^6.1.3",
    "typescript": "^4.1.3"
  },
  "nyc": {
    "extends": "@istanbuljs/nyc-config-typescript",
    "include": "src",
    "exclude": "src/**/test/*",
    "all": true,
    "check-coverage": true
  }

tsconfig.json

{
    "compilerOptions": {
        "module": "CommonJS",
        "esModuleInterop": true,
        "target": "es6",
        "noImplicitAny": true,
        "moduleResolution": "node",
        "sourceMap": true,
        "outDir": "dist",
        "baseUrl": ".",
        "noEmit": false,
        "paths": {
            "@domain/*":["./src/domain"],
            "@data_entry/*":["./src/data_entry"],
            "*": [
                "node_modules/*"
            ]
        },
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "lib": ["es6","dom"],
        "types": ["reflect-metadata","mocha","node"]
    },
    "include": [
        "src/**/*", 
        "index.ts"    ],
    "exclude": [
            "src/tests/",
            "node_modules/",
            "dist/"
          ],

}

我正在使用带有 typescript 和 mocha 的 nodejs v14.0.6 进行测试。

我做错了什么？

Answer 1

我遇到了同样的问题

显然，csv-writer 包包含测试，例如在堆栈跟踪中指定的 array.test.ts。

这是您用于运行 mocha 测试的脚本：

{
...    

test:run: "mocha --require ts-node/register --watch-extensions ts './**/test/**/*.ts'"

...
}

问题是您递归地寻找以下模式： './**/test/**/*.ts'

如您所见，csv-writer 测试匹配指定的模式：

~/node_modules/csv-writer/src /test/ csv-stringifiers/array .test.ts

解决方法是运行mocha测试时排除node_modules目录：

{
...    

test:run: "mocha --require ts-node/register --watch-extensions ts './{,!(node_modules)/**}/test/**/*.ts'"

...
}

希望这个回答对您有所帮助。

SyntaxError: Cannot use import statement outside a module error is thrown while using mocha to run tests

SyntaxError: Cannot use import statement outside a module error is thrown while using mocha to run tests

mocha.js

node.js

typescript