Question

我有一个示例nodejs项目，它是一个Google Pubsub Cloud Functions示例，我正在其中尝试使用Jest作为测试工具。

当我运行npm脚本进行单元测试时，我收到一条错误消息，指示打字稿未被识别。

我只是在做 npm run test：unit ，我已经将它包含在package.json文件中，但是却出现以下错误。

> jest ./test/unit

 FAIL  test/unit/orders.test.js
  ● Test suite failed to run

    SyntaxError: C:\Development\GCP-Jest\src\index.ts: Unexpected token, expected ";" (1:10)

    > 1 | let pgPool: any;
        |           ^
      2 | 
      3 | export const orders = async (event: any): Promise<void> => {
      4 |   let msgDataStr: string;

      at Parser.raise (node_modules/@babel/parser/lib/index.js:6387:17)
      at Parser.unexpected (node_modules/@babel/parser/lib/index.js:7704:16)
      at Parser.semicolon (node_modules/@babel/parser/lib/index.js:7686:40)
      at Parser.parseVarStatement (node_modules/@babel/parser/lib/index.js:10371:10)
      at Parser.parseStatementContent (node_modules/@babel/parser/lib/index.js:9967:21)
      at Parser.parseStatement (node_modules/@babel/parser/lib/index.js:9900:17)
      at Parser.parseBlockOrModuleBlockBody (node_modules/@babel/parser/lib/index.js:10476:25)
      at Parser.parseBlockBody (node_modules/@babel/parser/lib/index.js:10463:10)
      at Parser.parseTopLevel (node_modules/@babel/parser/lib/index.js:9829:10)
      at Parser.parse (node_modules/@babel/parser/lib/index.js:11341:17)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        3.795s
Ran all test suites matching /.\\test\\unit/i.

项目结构如下所示。

src / index.js

let pgPool: any;

export const orders = async (event: any): Promise<void> => {
  let msgDataStr: string;
  msgDataStr = event.data;
  pgPool = 1;
  console.error("Error in Unmarshalling data from event" + msgDataStr + pgPool);
};

test / unit / order.test.js

const orders = require('../../src');

describe('DataInflow Orders', () => {
    let consoleSpy;
    beforeEach(function() {
        consoleSpy = jest.spyOn(global.console, 'error').mockImplementation();
    });
    afterEach(function() {
        consoleSpy.mockRestore();
    });

    it('print outs the error message when received JSON is blank', async () => {
        const message = '';
        const event = {
            data: {
                data: Buffer.from(message).toString('base64'),
            },
            attributes: {},
        };

        await orders.orders(event);
        expect(consoleSpy.mock.calls[1][0]).toEqual(expect.stringContaining('Error in Unmarshalling data from event'));
    });
});

tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "esModuleInterop": true,
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "noUnusedLocals": true,
        "outDir": "lib",
        "sourceMap": true,
        "strict": true,
        "target": "es2018",
        "moduleResolution": "node",
        "baseUrl": "./",
        "typeRoots": [
            "./src/@types",
            "./node_modules/@types"
        ],
        "paths": {
            "*": [
                "src/@types/*"
            ]
        }
    },
    "compileOnSave": true,
    "include": [
        "src"
    ],
    "exclude": [
        "node_modules",
        "lib"
    ]
}

package.json

{
    "name": "poc-cf",
    "version": "0.0.1",
    "description": "Cloud Functions",
    "repository": {
        "type": "git",
        "url": ""
    },
    "license": "ISC",
    "dependencies": {
        "@google-cloud/pubsub": "^0.30.3",
        "moment": "^2.24.0",
        "pg": "^7.12.0"
    },
    "main": "lib/index.js",
    "types": "lib/@types",
    "jest": {
        "verbose": true,
        "setupFiles": [
            "dotenv/config"
        ],
        "roots": [
            "<rootDir>/test"
        ]
    },
    "scripts": {
        "lint": "eslint src/*/**",
        "build": "tsc",
        "test": "jest",
        "test:unit": "jest ./test/unit",
        "test:int": "jest ./test/integration",
        "test:coverage": "npm run test -- --coverage"
    },
    "devDependencies": {
        "@google-cloud/functions-framework": "^1.2.1",
        "@types/jest": "^24.0.17",
        "@types/node": "^12.6.8",
        "@types/pg": "^7.4.14",
        "@typescript-eslint/eslint-plugin": "^1.13.0",
        "@typescript-eslint/parser": "^1.13.0",
        "child_process": "^1.0.2",
        "dotenv": "^8.0.0",
        "eslint": "^6.2.1",
        "jest": "^24.8.0",
        "typescript": "^3.4.5"
    },
    "engines": {
        "node": ">=10.15.3"
    }
}

Answer 1

安装后，您需要使用.mpd url。

将以下类似的ts-jest配置添加到您的preset配置中。

jest

看看教程：https://www.npmjs.com/package/ts-jest#getting-started

Answer 2

每个人都已经注意到，您需要ts-jest。将其安装为开发依赖项。

另一个重要的配置是testEnvironment。默认设置为jsdom，看起来您可能需要将其设置为node。

我建议您使用jest.config.js。这是一个工作示例：

const {defaults} = require('jest-config');

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  transform: {
    '^.+\\.ts$': 'ts-jest',
  },
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.ts$',
  moduleFileExtensions: [...defaults.moduleFileExtensions, 'ts'],
  roots: [ "<rootDir>/src" ],
};

Google Cloud Function：开玩笑的测试无法识别打字稿语法

2 个答案: