Trying to use -t or --testNamePattern in Jest runs all tests

Question

I'm using jest and ts-jest configured in the way ts-jest describes in their docs.

If I run yarn test --listTests I can see the test file I want to run: processNewUser.ts included in the output in a __test__ folder in my project.

I can run that test only with yarn test --testPathPattern='processNewUser'

But If I try use yarn test --testNamePattern='Processes new user. Auth' which is the name of the test, then every test runs, including all with no name string like what is specified.

Same with: yarn test -t="Auth" yarn test -t Auth yarn test --testNamePattern "Auth" jest Auth jest -t="Processes" etc etc. and every combo of syntax really. Also tried this with naming a describe function wrapper instead of a test. No luck.

My tsconfig.json is:

{
  "compilerOptions": {
    "target": "ES6",
    "module": "commonjs",
    "outDir": "dist",
    "sourceMap": true,
    "allowJs": true,
    "strict": true,
    "noImplicitAny": false,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "removeComments": false,
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "lib": [
      "ES2020.Promise",
      "ES2015.Iterable",
      "ES2015.Symbol.WellKnown"
    ],
  },
  "include": ["src/**/*"],
}

My jest.config.ts is:

import type {Config} from '@jest/types';
const config: Config.InitialOptions = {
  clearMocks: true,
  coverageDirectory: 'coverage',
  coverageProvider: 'v8',
  moduleFileExtensions: ['js', 'json', 'jsx', 'ts', 'tsx', 'node'],
  preset: 'ts-jest',
  setupFiles: ['dotenv/config'],
  setupFilesAfterEnv: ['./jest.setup.js'],
  testEnvironment: 'node',
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
    '^.+\\.ts?$': 'ts-jest',
  },
  transformIgnorePatterns: ['/node_modules/', '\\.pnp\\.[^\\/]+$'],
  
}

export default config;

Yarn script is just: "test": "jest",

I want this to be able to tag a test with auth for example to have all auth tests run.

Any help?

score 0 · Answer 1 · answered May 26 '21 at 06:37

0

The predicate for filtering out tests by name is defined here:

  if (globalConfig.testNamePattern) {
    const testNameRegex = new RegExp(globalConfig.testNamePattern, 'i');
    env.specFilter = (spec: Spec) => testNameRegex.test(spec.getFullName());
  }

Notice that it checks created regexp against full name of each spec. I.e. the name of the test suite itself plus names of all surrounding describe blocks.

answered May 26 '21 at 06:37

aleksxor

5,898
15
20

thats just a definition, but no explanation for "why does jest run all tests, when i filter tests by a pattern?" as i understand, filters can only filter by spec-name (`describe('spec-name')`), and fine-grained control is possible with [test.only](https://stackoverflow.com/questions/42827054/how-do-i-run-a-single-test-using-jest) – Mila Nautikus Mar 31 '22 at 11:57

Trying to use -t or --testNamePattern in Jest runs all tests

1 Answers1