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Jest Ignore Coverage

To see all the following in action, run yarn install (or npm install) followed by yarn test (or npx jest --coverage) to collect coverage.

Exclude file(s) from Jest coverage using configuration

See ./package.json testPathIgnorePatterns. It ignores the contents of src/testignore, which actually just contains a failing test in ./src/testignore/ignored-test.test.js.

See ./package.json collectCoverageFrom. It does not collect coverage from ./src/config-ignore-me.js.

Exclude file from Jest coverage at the file level

See ./src/comment-ignored.js. It uses the comment notation to ignore the file.

Exclude function or statement from Jest coverage

See [./src/snippet.js]. It showcases the istanbul ignore next and istanbul ignore [type] syntax (in this case istanbul ignore else).

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Examples of how to ignore files/functions/statements for coverage

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