Jest: Jest not finding any tests

[milesj]

Do you want to request a _feature_ or report a _bug_?

Bug report.

What is the current behavior?

I'm converting one of my projects to TypeScript here: https://github.com/milesj/optimal Running yarn run jest will not find and run any tests, no matter what variation of testMatch and testRegex that Itry. That being said, it's correctly finding my jest.config.js, as denoted when using --debug, as seen below.

{
  "configs": [
    {
      "automock": false,
      "browser": false,
      "cache": true,
      "cacheDirectory": "/var/folders/x1/q5gdh6d14h3fkxhgxx75k41h0000gn/T/jest_dx",
      "clearMocks": false,
      "coveragePathIgnorePatterns": [
        "/node_modules/",
        "/lib/",
        "/esm/"
      ],
      "detectLeaks": false,
      "forceCoverageMatch": [],
      "globals": {
        "__DEV__": true,
        "ts-jest": {
          "useBabelrc": true
        }
      },
      "haste": {
        "providesModuleNodeModules": []
      },
      "moduleDirectories": [
        "node_modules"
      ],
      "moduleFileExtensions": [
        ".ts",
        ".tsx",
        ".js",
        ".jsx",
        ".json"
      ],
      "moduleNameMapper": {},
      "modulePathIgnorePatterns": [],
      "name": "656565fb122fb27c21e0885f8d7856db",
      "resetMocks": false,
      "resetModules": false,
      "restoreMocks": false,
      "rootDir": "/Users/Miles/Sites/optimal",
      "roots": [
        "/Users/Miles/Sites/optimal/src",
        "/Users/Miles/Sites/optimal/tests"
      ],
      "runner": "jest-runner",
      "setupFiles": [
        "/Users/Miles/Sites/optimal/node_modules/regenerator-runtime/runtime.js"
      ],
      "setupTestFrameworkScriptFile": null,
      "snapshotSerializers": [],
      "testEnvironment": "jest-environment-jsdom",
      "testEnvironmentOptions": {},
      "testLocationInResults": false,
      "testMatch": [],
      "testPathIgnorePatterns": [
        "/node_modules/"
      ],
      "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
      "testRunner": "/Users/Miles/Sites/optimal/node_modules/jest-jasmine2/build/index.js",
      "testURL": "about:blank",
      "timers": "real",
      "transform": [
        [
          "^.+\\.jsx?$",
          "/Users/Miles/Sites/optimal/node_modules/babel-jest/build/index.js"
        ],
        [
          "^.+\\.tsx?$",
          "/Users/Miles/Sites/optimal/node_modules/ts-jest/index.js"
        ]
      ],
      "transformIgnorePatterns": [
        "/node_modules/"
      ],
      "watchPathIgnorePatterns": []
    }
  ],
  "globalConfig": {
    "bail": false,
    "changedFilesWithAncestor": false,
    "coverageDirectory": "/Users/Miles/Sites/optimal/coverage",
    "coverageReporters": [
      "lcov"
    ],
    "detectLeaks": false,
    "expand": false,
    "globalSetup": null,
    "globalTeardown": null,
    "listTests": false,
    "logHeapUsage": true,
    "maxWorkers": 7,
    "noStackTrace": false,
    "nonFlagArgs": [],
    "notify": false,
    "notifyMode": "always",
    "passWithNoTests": false,
    "rootDir": "/Users/Miles/Sites/optimal",
    "runTestsByPath": false,
    "testFailureExitCode": 1,
    "testPathPattern": "",
    "testResultsProcessor": null,
    "updateSnapshot": "new",
    "useStderr": false,
    "verbose": false,
    "watch": false,
    "watchman": true
  },
  "version": "22.4.2"
}
No tests found
No files found in /Users/Miles/Sites/optimal.
Make sure Jest's configuration does not exclude this directory.
To set up Jest, make sure a package.json file exists.
Jest Documentation: facebook.github.io/jest/docs/configuration.html
Pattern:  - 0 matches

What is the expected behavior?

It finds and runs my tests.

Please provide your exact Jest configuration

My Jest configuration is automatically built with Beemo, but looks like the following.

module.exports = {
  "coverageDirectory": "./coverage",
  "coveragePathIgnorePatterns": [
    "/node_modules/",
    "/lib/",
    "/esm/"
  ],
  "coverageReporters": [
    "lcov"
  ],
  "globals": {
    "__DEV__": true,
    "ts-jest": {
      "useBabelrc": true
    }
  },
  "moduleFileExtensions": [
    ".ts",
    ".tsx",
    ".js",
    ".jsx",
    ".json"
  ],
  "rootDir": "/Users/Miles/Sites/optimal",
  "roots": [
    "./src",
    "./tests"
  ],
  "setupFiles": [],
  "setupTestFrameworkScriptFile": null,
  "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
  "transform": {
    "^.+\\.jsx?$": "babel-jest",
    "^.+\\.tsx?$": "ts-jest"
  },
  "verbose": false
};

Run npx envinfo --preset jest in your project directory and paste the
results here

System:
OS: macOS High Sierra 10.13.3
CPU: x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
Binaries:
Node: 9.8.0
Yarn: 1.5.1
npm: 5.1.0

[milesj]

I got it to work briefly using moduleFileExtensions: ['.js', '.jsx', '.json', '.ts', '.tsx'],, but then it stopped working again. This seems really weird.

[milesj]

Turns out the problem was that my moduleFileExtensions had a preceeding period. Perhaps Jest should check for that.

[SimenB]

That should definitely be in the docs! Mind sending a PR for it?

[sidkareem]

im having the same issue.im actually doing the udemy course and currently working on testing..

No tests found
No files found in C:\Users\sidka\nodejsnode_modules\redux-adv-burger--01-async-action-ingredients.
Make sure Jest's configuration does not exclude this directory.
To set up Jest, make sure a package.json file exists.
Jest Documentation: facebook.github.io/jest/docs/configuration.html
Pattern: /NavigationItems/ - 0 matches

Active Filters: filename /NavigationItems/
› Press c to clear filters.

Watch Usage
› Press a to run all tests.
› Press o to only run tests related to changed files.
› Press p to filter by a filename regex pattern.
› Press t to filter by a test name regex pattern.
› Press q to quit watch mode.
› Press Enter to trigger a test run.
..what do i do?

this is package.json file..
{
"name": "react-complete-guide",
"version": "0.1.0",
"private": true,
"dependencies": {
"autoprefixer": "7.1.2",
"axios": "^0.16.2",
"babel-core": "6.25.0",
"babel-eslint": "7.2.3",
"babel-jest": "20.0.3",
"babel-loader": "7.1.1",
"babel-preset-react-app": "^3.0.2",
"babel-runtime": "6.26.0",
"case-sensitive-paths-webpack-plugin": "2.1.1",
"chalk": "1.1.3",
"css-loader": "0.28.4",
"dotenv": "4.0.0",
"enzyme": "^3.11.0",
"enzyme-adapter-react-16": "^1.15.4",
"eslint": "4.4.1",
"eslint-config-react-app": "^2.0.0",
"eslint-loader": "1.9.0",
"eslint-plugin-flowtype": "2.35.0",
"eslint-plugin-import": "2.7.0",
"eslint-plugin-jsx-a11y": "5.1.1",
"eslint-plugin-react": "7.1.0",
"extract-text-webpack-plugin": "3.0.0",
"file-loader": "0.11.2",
"fs-extra": "3.0.1",
"html-webpack-plugin": "2.29.0",
"jest": "20.0.4",
"object-assign": "4.1.1",
"postcss-flexbugs-fixes": "3.2.0",
"postcss-loader": "2.0.6",
"promise": "8.0.1",
"prop-types": "^15.6.0",
"r": "0.0.5",
"react": "^16.0.0",
"react-dev-utils": "^4.0.1",
"react-dom": "^16.0.0",
"react-redux": "^5.0.6",
"react-router-dom": "^4.2.2",
"react-test-renderer": "^16.13.1",
"redux": "^3.7.2",
"redux-thunk": "^2.2.0",
"style-loader": "0.18.2",
"sw-precache-webpack-plugin": "0.11.4",
"url-loader": "0.5.9",
"webpack": "3.5.1",
"webpack-dev-server": "2.7.1",
"webpack-manifest-plugin": "1.2.1",
"whatwg-fetch": "2.0.3"
},
"scripts": {
"start": "node scripts/start.js",
"build": "node scripts/build.js",
"test": "node scripts/test.js --env=jsdom"
},
"jest": {
"collectCoverageFrom": [
"src//.{js,jsx}"
],
"setupFiles": [
"/config/polyfills.js"
],
"testMatch": [
"/src//__tests__//.js?(x)",
"/src//?(.)(spec|test).js?(x)"
],
"testEnvironment": "node",
"testURL": "http://localhost",
"transform": {
"^.+\.(js|jsx)$": "/node_modules/babel-jest",
"^.+\.css$": "/config/jest/cssTransform.js",
"^(?!.\.(js|jsx|css|json)$)": "/config/jest/fileTransform.js"
},
"transformIgnorePatterns": [
"[/\\]node_modules[/\\].+\.(js|jsx)$"
],
"moduleNameMapper": {
"^react-native$": "react-native-web"
},
"moduleFileExtensions": [
"web.js",
"js",
"json",
"web.jsx",
"jsx",
"node"
]
},
"babel": {
"presets": [
"react-app"
]
},
"eslintConfig": {
"extends": "react-app"
}
}