Jest: How to ignore files on jest watch mode

[noyobo]

Do you want to request a feature or report a bug?

• feature

What is the current behavior?

jest --watch my tests will create new files on project directory. jest rerun when watch new files. run tests loop ......

I try set testPathIgnorePatterns and testPathDirs exclude the new files directory, but same way.

If the current behavior is a bug, please provide the steps to reproduce and either a repl.it demo through https://repl.it/languages/jest or a minimal repository on GitHub that we can yarn install and yarn test.

What is the expected behavior?

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

• yarn 0.18.1
• jest 16.0.2
• node 7.3.0

[orta]

Looks like the coverageDirectory option should help you there.

I'm also seeing this https://github.com/danger/danger-js/pull/82, so this is how I debugged it - if you edit your node_modules you can make this function console.log what file is triggering the restart

[orta]

And as I'm interested in specific answers too, my problem was that something was making my fixtures change ( I assume it's the typescript compiler )

I fixed it by doing this in the package.json

...
 "coveragePathIgnorePatterns": [
      "/node_modules/",
      "(.test)\\.(ts|tsx|js)$",
      "/distribution/.*\\.(ts|js)$"
    ]
...

[cpojer]

This should fix it: https://github.com/facebook/jest/pull/2362

[noyobo]

const onFileChange = (_, filePath: string) => {
  filePath = path.join(root, filePath);
  const coverageDirectory =
    config.coverageDirectory ||
    path.resolve(config.rootDir, 'coverage');
  const isValidPath =
    config.testPathDirs.some(dir => filePath.startsWith(dir)) &&
    !filePath.includes(coverageDirectory);

Look at this condition !filePath.includes(coverageDirectory), the change filepath must includes coverageDirectory.

But coverageDirectory option should output jest coverage files.

I see you use os.tmpdir() to avoid this problem.

[cpojer]

Jest 19 is out now.

[tivac]

I'm running into this, I'm unable to use jest watch because my test files clean up the test output dirs using afterAll and watch doesn't like that at all.

D:\git\modular-css>npm test cli -- --watch

> [email protected] test D:\git\modular-css
> jest "cli" "--watch"

 PASS  packages\cli\test\cli.test.js
  /cli.js
    √ should show help with no args (304ms)
    √ should default to outputting to stdout (348ms)
    √ should support outputting to a file (342ms)
    √ should support outputting compositions to a file (336ms)
    √ should return the correct error code on invalid CSS (338ms)

Snapshot Summary
 › 1 obsolete snapshot found, press `u` to remove them.

Test Suites: 1 passed, 1 total
Tests:       5 passed, 5 total
Snapshots:   4 passed, 4 total
Time:        2.835s, estimated 3s
Ran all test suites matching /cli/.

Watch Usage
 › Press a to run all tests.
 › Press o to only run tests related to changed files.
 › Press u to update failing snapshots.
 › 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.
events.js:163
      throw er; // Unhandled 'error' event
      ^

Error: EPERM: operation not permitted, lstat 'D:\git\modular-css\packages\cli\test\output\classes.json'

Ideally I can tell jest to ignore all output dirs for watching files, but coveragePathIgnorePatterns description doesn't make it sound like the right thing.

Is coveragePathIgnorePatterns really the right approach?

[tivac]

Doesn't seem like it, I get the same error with the following added to my package.json.

"jest": {
    "coveragePathIgnorePatterns": [
      "node_modules",
      "output"
    ]
  }

[fathyb]

Same here using Jest 19.0.2, stuck in an infinite watch loop without --coverage, my tests are in src/ and creates files in tests-data/. Using testPathIgnorePatterns: [/tests-data/, /node_modules/] doesn't seems to do the trick, neither do coveragePathIgnorePatterns.

[reergymerej]

watchPathIgnorePatterns is the current way.

[tivac]

I actually have that set up already, but it still doesn't work, I get crashes any time I try to use jest --watch.

https://github.com/tivac/modular-css/blob/d459beb2f41d389bd397a73821b59135b0e9f791/jest.config.js#L13-L16

[marcinczenko]

I am using a monorepo. I have a fixture folder where I create temporary files used by some tests. I can't get watchPathIgnorePatterns working. Does not matter if I keep on the top level of the jest.config.js, or inside specific project entry in projects. If I run yarn jest --watch SomeTestFile.test the runner keeps restarting. The only way I can get it to work is via changing the name of the fixture folder to .fixtures.

I also tried to use an absolute path, with 1-1 match of the file causing the problem, also does not help...

My intended setup is this:

module.exports = {
  projects: [
    'workspaces/hush-hush',
    'workspaces/queuing-service',
    'workspaces/telepath',
    'workspaces/idbox-react-ui',
    'workspaces/utils',
    {
      rootDir: 'workspaces/idservice',
      testEnvironment: 'node'
    },
    {
      rootDir: 'workspaces/nameservice',
      testEnvironment: 'node'
    },
    {
      testMatch: ['<rootDir>/dummy']
    }
  ],
  collectCoverage: true,
  collectCoverageFrom: [
    'source/**/*.js',
    'src/**/*.js',
    'pages/*.js',
    'components/**',
    '!pages/_app.js',
    '!**/jest.config.js',
    '!**/_document.js',
    '!**/*.test.js',
    '!**/__mocks__/**.js',
    '!**/node_modules/**',
    '!**/.next/**'
  ],
  coverageReporters: [
    'text-summary',
    'lcov'
  ],
  watchPathIgnorePatterns: [
    '<rootDir>/fixtures/idservice/'
  ]
}

My tests dynamically create a fixture file in <rootDir>/fixtures/idservice/ - in this case in the root of the monorepo, not in the root of the workspace. Since this does not seem to work, I thought maybe I need to use the root of the workspace itself, so I put watchPathIgnorePatterns inside projects entry like this:

module.exports = {
  projects: [
    // ....
    {
      rootDir: 'workspaces/idservice',
      testEnvironment: 'node',
      watchPathIgnorePatterns: [
        '<rootDir>/fixtures/idservice/'
      ]
    },

and then have the fixtures folder in the workspace root, but this does not seem to work either. I tried different values, absolute paths, nothing seems to work. What am I doing wrong?

The link to repo is here: https://github.com/identity-box/identity-box

I am using jest version 25.1.0.