Is there a way to generate text coverage report for a single test file using Vitest & v8?

Question

I have an npm script in the package.json:

"test:coverage": "vitest run --coverage",

Also, there is a hello.test.ts test file.

I want:

Vitest to run a single hello.test.ts file
Generate a v8 coverage report for the single corresponding hello.ts file

Unfortunately, I couldn't find anything suitable in the official documentation: https://vitest.dev/config/#coverage

I tried adding an argument --collectCoverageFrom=src/hello.ts, but it was not recognized.

Running npm run test:coverage hello.test.ts narrows the execution of tests to a hello.test.ts file, but the text coverage report includes other files directly not related to hello.ts.

RyanMarkJohnson · Accepted Answer · 2025-03-07 21:53:38Z

1

You might try the --coverage.include <pattern> CLI argument instead.

https://vitest.dev/guide/cli.html#coverage-include

answered Mar 7 at 21:53

RyanMarkJohnson

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Miki Bakaiki · Accepted Answer · 2025-03-21 14:15:19Z

0

I think that you might be successful with the command:

npm run test:coverage:file <your_file>

where test:coverage:file is

vitest run --coverage --testNamePattern

answered Mar 21 at 14:15

Miki Bakaiki

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grizzly · Accepted Answer · 2025-05-15 19:17:48Z

0

I have found this to work:

vitest run <your_test_file> --coverage.enabled true --coverage.include=<your_file_to_be_tested>

edited May 15 at 19:17

answered May 15 at 18:33

grizzly

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