node.js - Jest trece testele, dar opțiunea --covering nu preia fișierele

Descrierea problemei:
Am scris două teste pentru o clasă TypeScript. Aceste două teste trec, astfel că Jest preia cu succes fișierele de test. Apoi folosesc opțiunea --coverage, dar se pare că Jest nu selectează fișierele acoperite aici.
Iată rezultatul pe care îl primesc:

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.

Am încercat să mă joc cu opțiunea collectCoverageFrom, dar fără succes. Am testat acoperirea cu câteva exemple simple găsite pe GitHub și acelea funcționau, deci problema nu este din mediul meu. Presupun că am ratat cumva ceva în configurația mea, dar am petrecut atât de mult timp pe asta încât încep să fiu puțin frustrat, așa că poate niște priviri proaspete ar putea ajuta..

Arhitectura proiectului :

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"
}

Răspuns #1

Îți lipsește o setare în jest.config.js, collectCoverage: true

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

Eu folosesc de asemenea un collectCoverageFrom mai descriptiv:

collectCoverageFrom: [
    '<rootDir>/src/**/*.ts',
    '!<rootDir>/src/**/*.interface.ts',
    '!<rootDir>/src/**/*.mock.ts',
    '!<rootDir>/src/**/*.module.ts',
    '!<rootDir>/src/**/*.spec.ts',
    '!<rootDir>/src/**/*.test.ts',
    '!<rootDir>/src/**/*.d.ts'
],

În acest fel exclud o serie de fișiere de la care nu vreau să calculez acoperirea, cum ar fi modulele mele, simulările și testele.

Fișierul meu complet cu procesul original de inițializare Jest și comentariile de la acesta.

Pentru o explicație detaliată privind fiecare proprietate de configurare, vizitați: documentația Jest

module.exports = {
    // All imported modules in your tests should be mocked automatically
    // automock: false,

    // Stop running tests after the first failure
    // bail: false,

    // Respect "browser" field in package.json when resolving modules
    // browser: false,

    // The directory where Jest should store its cached dependency information
    // cacheDirectory: "C:\\Users\\sscott\\AppData\\Local\\Temp\\jest",

    // Automatically clear mock calls and instances between every test
    // clearMocks: false,

    // Indicates whether the coverage information should be collected while executing the test
    collectCoverage: true,

    // An array of glob patterns indicating a set of files for which coverage information should be collected
    collectCoverageFrom: [
        '<rootDir>/src/**/*.ts',
        '!<rootDir>/src/**/*.mock.ts',
        '!<rootDir>/src/**/*.module.ts',
        '!<rootDir>/src/**/*.spec.ts',
        '!<rootDir>/src/**/*.test.ts',
        '!<rootDir>/src/**/*.d.ts'
    ],
    // The directory where Jest should output its coverage files
    coverageDirectory: "<rootDir>/docs",

    // An array of regexp pattern strings used to skip coverage collection
    coveragePathIgnorePatterns: [
        ""\node_modules"\"
    ],

    // A list of reporter names that Jest uses when writing coverage reports
    coverageReporters: [
        "lcov",
        "clover",
        "text-summary"
    ],

    // An object that configures minimum threshold enforcement for coverage results
    // coverageThreshold: null,

    // Make calling deprecated APIs throw helpful error messages
    errorOnDeprecated: true,

    // Force coverage collection from ignored files usin a array of glob patterns
    // forceCoverageMatch: [],

    // A path to a module which exports an async function that is triggered once before all test suites
    // globalSetup: null,

    // A path to a module which exports an async function that is triggered once after all test suites
    // globalTeardown: null,

    // A set of global variables that need to be available in all test environments
    globals: {
        "ts-jest": {
            "diagnostics": false,
            "tsConfig": "tsconfig.json"
        }
    },

    // An array of directory names to be searched recursively up from the requiring module's location
    // moduleDirectories: [
    //   "node_modules"
    // ],

    // An array of file extensions your modules use
    moduleFileExtensions: [
        "ts",
        "tsx",
        "js"
    ],

    // A map from regular expressions to module names that allow to stub out resources with a single module
    // moduleNameMapper: {},

    // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
    // modulePathIgnorePatterns: [],

    // Activates notifications for test results
    // notify: false,

    // An enum that specifies notification mode. Requires { notify: true }
    // notifyMode: "always",

    // A preset that is used as a base for Jest's configuration
    // preset: null,

    // Run tests from one or more projects
    // projects: null,

    // Use this configuration option to add custom reporters to Jest
    // reporters: undefined,

    // Automatically reset mock state between every test
    // resetMocks: false,

    // Reset the module registry before running each individual test
    // resetModules: false,

    // A path to a custom resolver
    // resolver: null,

    // Automatically restore mock state between every test
    // restoreMocks: false,

    // The root directory that Jest should scan for tests and modules within
    // rootDir: null,

    // A list of paths to directories that Jest should use to search for files in
    roots: [
       "<rootDir>/src"
    ],

    // Allows you to use a custom runner instead of Jest's default test runner
    // runner: "jest-runner",

    // The paths to modules that run some code to configure or set up the testing environment before each test
    // setupFiles: [],

    // The path to a module that runs some code to configure or set up the testing framework before each test
    // setupTestFrameworkScriptFile: null,

    // A list of paths to snapshot serializer modules Jest should use for snapshot testing
    // snapshotSerializers: [],

    // The test environment that will be used for testing
    testEnvironment: "node",

    // Options that will be passed to the testEnvironment
    // testEnvironmentOptions: {},

    // Adds a location field to test results
    // testLocationInResults: false,

    // The glob patterns Jest uses to detect test files
    testMatch: [
        "**/*.spec.ts"
    ],

    // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
    // testPathIgnorePatterns: [
    //   ""\node_modules"\"
    // ],

    // The regexp pattern Jest uses to detect test files
    // testRegex: "",

    // This option allows the use of a custom results processor
    // testResultsProcessor: null,
    // "testResultsProcessor": "jest-jenkins-reporter",
    
    // This option allows use of a custom test runner
    // testRunner: "jasmine2",

    // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
    // testURL: "http://localhost",

    // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
    // timers: "real",

    // A map from regular expressions to paths to transformers
    transform: {
        "^.+\\.(ts|tsx)$": "ts-jest"
    },

    // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
    // transformIgnorePatterns: [
    //   ""\node_modules"\"
    // ],

    // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
    // unmockedModulePathPatterns: undefined,

    // Indicates whether each individual test should be reported during the run
    verbose: false

    // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
    // watchPathIgnorePatterns: [],

    // Whether to use watchman for file crawling
    // watchman: true,
};

Răspunsul #2

După multe cercetări pe mai multe pagini, aceasta a funcționat pentru mine pentru a obține raportul de acoperire:

pune linia de mai jos sub scripturi:

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

Și, adaugă codul de mai jos pentru configurarea jest în fișierul package.json astfel:

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

Și, apoi aleargă

npm run test:coverage