How can I ignore a file pattern for Jest code coverage?

Question

In my Jest tested project I have *.entity.ts files. I don't want these files to be included in my coverage test.

According to the documentation at https://facebook.github.io/jest/docs/en/configuration.html#coveragepathignorepatterns-array-string there is a coveragePathIgnorePatterns setting which you can use in the package.json

I've tried regex and file patterns but none of these just ignores the *.entity.ts files in the final report.

When I add for example "coveragePathIgnorePatterns": ["common"] my tests won't even run anymore.

Any thoughts on how I can make Jest skip the *.entity.ts in the coverage tests?

My Jest section in the package.json looks like:

{     "moduleFileExtensions": [         "js",         "json",         "ts"     ],     "rootDir": "src",     "testRegex": ".spec.ts$",     "transform": {         "^.+\\.(t|j)s$": "ts-jest"     },     "coverageDirectory": "../coverage" } 

Answer 1

I use an external JSON file to hold my Jest configuration and run it from my package.json using npm: jest --config jest.config.json --no-cache

jest.config.json

{     "collectCoverage": true,     "collectCoverageFrom": [         "src/**/*.ts"     ],     "coveragePathIgnorePatterns": [         "node_modules",         "test-config",         "interfaces",         "jestGlobalMocks.ts",         ".module.ts",         "<rootDir>/src/app/main.ts",         ".mock.ts"     ],     "coverageDirectory": "<rootDir>/coverage/",     "coverageThreshold": {         "global": {             "branches": 20,             "functions": 30,             "lines": 50,             "statements": 50         }     },     "mapCoverage": true,     "preset": "jest-preset-angular",     "setupTestFrameworkScriptFile": "<rootDir>/src/setupJest.ts",      "transformIgnorePatterns": [         "<rootDir>/node_modules/(?!@ionic-native|@ionic|@ngrx|angular2-ui-switch|angularfire2|jest-cli)"     ],     "verbose": false } 

My coverage does not include the files listed in the "coveragePathIgnorePatterns". Maybe the source line "/src/app/main.ts" is the entry you need.

Answer 2

You can add a ! mark in collectCoverageFrom parameter to exclude it from counting. Here any file inside a subfolder of src dir

  collectCoverage: true,   collectCoverageFrom: ['src/**/*.ts','!src/*/filesToExclude.ts']