Question

问题描述：
我为打字稿类编写了两个测试。这两个测试通过了，所以开玩笑成功地获取了测试文件。然后，我使用--coverage选项，但似乎在开玩笑，没有在这里选择覆盖的文件。
这是我得到的输出：

api_jester    | PASS src/tests/repositories/user.test.ts
api_jester    |   User Repository
api_jester    |     ✓ it should return an empty array (18ms)
api_jester    |     ✓ should successfully create a user and return its data (7ms)
api_jester    | 
api_jester    | ----------|----------|----------|----------|----------|-------------------|
api_jester    | File      |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
api_jester    | ----------|----------|----------|----------|----------|-------------------|
api_jester    | All files |        0 |        0 |        0 |        0 |                   |
api_jester    | ----------|----------|----------|----------|----------|-------------------|
api_jester    | Test Suites: 1 passed, 1 total
api_jester    | Tests:       2 passed, 2 total
api_jester    | Snapshots:   0 total
api_jester    | Time:        3.208s
api_jester    | Ran all test suites.

我尝试使用collectCoverageFrom选项，但没有成功。我已经测试了在github上找到的一些简单示例的覆盖范围，并且这些示例都在工作，因此问题并非出自我的环境。我猜我以某种方式错过了配置中的某些内容，但是我花了很多时间在此上，我感到很沮丧，所以也许一些新鲜的外观可能会有所帮助。

项目体系结构：

config
|__ jest.config.js
|__ tsconfig.json
src
|__tests
|  |__repositories
|     |__user.test.ts
|__repositories
   |___ userRepository
        |__User.ts

Jest.config.js：

module.exports = {
  preset: "ts-jest",
  testEnvironment: "node",
  roots: ["../src/tests/"],
  transform: {
    "^.+\\.tsx?$": "ts-jest"
  },
  collectCoverageFrom: ["../src/"],
  moduleFileExtensions: ["ts", "js", "json"],
  coverageDirectory: "../coverage"
};

package.json

{
  "name": "theralog_api",
  "version": "1.0.0",
  "description": "",
  "main": "server.js",
  "scripts": {
    "build": "tsc",
    "prettier": "npx prettier --write src/**/*.ts --config ./config/.prettierrc",
    "eslint": "npx eslint --config ./config/.eslintrc ./src/**/**/*",
    "start:dev": "npx nodemon -L --config ./config/api.nodemon.json",
    "test:watch": "npx nodemon -L --config ./config/jester.nodemon.json",
    "test:coverage": "npx jest --config ./config/jest.config.js --coverage --colors --watch"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@types/compression": "^1.0.1",
    "@types/express": "^4.17.1",
    "@types/graphql-depth-limit": "^1.1.2",
    "@types/jest": "^24.0.23",
    "@types/node": "^12.7.12",
    "@typescript-eslint/eslint-plugin": "^2.5.0",
    "@typescript-eslint/parser": "^2.5.0",
    "apollo-server-testing": "2.9.7",
    "babel-jest": "^24.9.0",
    "eslint": "^6.5.1",
    "eslint-config-prettier": "^6.4.0",
    "graphql-depth-limit": "^1.1.0",
    "graphql-import": "^0.7.1",
    "graphql-import-node": "0.0.4",
    "jest": "^24.9.0",
    "nodemon": "^1.19.3",
    "prettier": "^1.18.2",
    "ts-jest": "^24.1.0",
    "ts-node": "^8.4.1",
    "tsconfig-paths": "^3.9.0",
    "typescript": "^3.7.2"
  },
  "dependencies": {
    "apollo-server-express": "^2.9.6",
    "compression": "^1.7.4",
    "cors": "^2.8.5",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "graphql": "^14.5.8",
    "http": "0.0.0",
    "lodash": "^4.17.15",
    "ncp": "^2.0.0",
    "pg": "^7.12.1",
    "winston": "3.2.1"
  }
}

jester.nodemon.json

{
  "watch": ["../src"],
  "ext": "ts",
  "exec": "npx jest --config ./config/jest.config.js --watchAll"
}

Answer 1

您缺少jest.config.js中的设置，final_df = data.frame(conditions = colnames(df),Coefficient = mod)

mod <- mod[!is.na(mod)]

我还使用更具描述性的collectCoverageFrom：

collectCoverage: true

这样，我就排除了一些我不想计算覆盖范围的文件，例如我的模块，模拟和测试。

我的完整文件以及原始的Jest初始化过程和来自其中的评论。

有关每个配置属性的详细说明，请访问：the Jest documentation

module.exports = {
  preset: "ts-jest",
  testEnvironment: "node",
  roots: ["../src/tests/"],
  transform: {
    "^.+\\.tsx?$": "ts-jest"
  },
  collectCoverage: true,
  collectCoverageFrom: ["../src/"],
  moduleFileExtensions: ["ts", "js", "json"],
  coverageDirectory: "../coverage"
};

Answer 2

在几个页面上进行大量研究后，这对我有用，以获得覆盖率报告：

在脚本下面放置一行：

"test:coverage": "set CI=true && react-scripts test --coverage",

并且，在 package.json 文件中添加以下代码用于 jest 配置，如下所示：

 "jest": {
    "collectCoverageFrom": [
      "**/*.{js,jsx}",
      "!**/node_modules/**",
      "!**/coverage/**",
      "!**/serviceWorker.js",
      "!**/index.js"
    ],
    "coveragePathIgnorePatterns": [
      "/node_modules/",
      "package.json",
      "package-lock.json"
    ]
  }

然后运行

npm run test:coverage

开玩笑通过测试，但--covering选项未拾取文件

2 个答案: