Coverage data was not found when using "--collectCoverageFrom"

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

What is the current behavior? When I’m using the Jest CLI like this: jest --coverage --collectCoverageFrom "_path of a file_" I get this error: Jest: Coverage data for global was not found.

My goal is to execute the coverage only on some files.

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. Repl.it don’t seems to work, but just type jest --coverage --collectCoverageFrom "_path of a file_"

What is the expected behavior? Display the coverage table of the files specified by the collectCoverageFrom option.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system. "jest": { "collectCoverage": true, "collectCoverageFrom": [ "src/**/*.js" ], "coverageThreshold": { "global": { "branches": 100, "functions": 100, "lines": 100, "statements": 0 } }, "moduleFileExtensions": [ "js" ], }

Jest 22.2.2 Node 8.9.4 yarn 1.3.2 macOS 10.13.4

Thanks!

[yss14]

@noelebrun Did you solved this problem?

I currently facing the same error with my typescript ts-jest setup.

This is my config:

{
	"transform": {
		"^.+\\.tsx?$": "ts-jest"
	},
	"testRegex": "(/__tests__/.*|(\\.|/)(unit\\.test))\\.(tsx?)$",
	"moduleFileExtensions": [
		"ts",
		"js"
	],
	"globals": {
		"ts-jest": {
			"skipBabel": true
		}
	},
	"testPathIgnorePatterns": [],
	"collectCoverage": true,
	"collectCoverageFrom": [
		"./src/utils/**/*.ts"
	],
	"coverageThreshold": {
		"global": {
			"branches": 100,
			"functions": 100,
			"lines": 80,
			"statements": -10
		}
	}
}

And this is the console output:

> cross-env NODE_ENV=testing jest --forceExit --coverage --config=jest-unit.config.json

 PASS  src/tests/unit-tests/prune-object-properties.unit.test.ts
 PASS  src/tests/unit-tests/sample.unit.test.ts
----------|----------|----------|----------|----------|-------------------|
File      |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
----------|----------|----------|----------|----------|-------------------|
All files |        0 |        0 |        0 |        0 |                   |
----------|----------|----------|----------|----------|-------------------|
Jest: Coverage data for global was not found.

Test Suites: 2 passed, 2 total
Tests:       7 passed, 7 total
Snapshots:   0 total
Time:        2.267s
Ran all test suites.

I also tried to provide coverageDirectory , but without any change to the error message.

My dependencies:

• jest: 22.4.3
• ts-jest: 22.4.2

[SimenB]

There are no tests in that repo though. Adding a dummy test gives the following output:

I suppose we could improve the message when there are no tests, or just skip the coverage report when there are none?