How do I run a single test using Jest?

jestjs
vijayst picture vijayst · Mar 16, 2017 · Viewed 269k times · Source

I have a test 'works with nested children' within the file fix-order-test.js.

Running the below runs all the tests in the file.

jest fix-order-test

How do I run only a single test? The below does not work as it searches for a file of the regex specified.

jest 'works with nested children'

Answer

Andreas Köberle picture Andreas Köberle · Mar 20, 2017

From the command line, use the --testNamePattern or -t flag:

jest -t 'fix-order-test'

This will only run tests that match the test name pattern you provide. It's in the Jest documentation.

Another way is to run tests in watch mode, jest --watch, and then press P to filter the tests by typing the test file name or T to run a single test name.

If you have an it inside of a describe block, you have to run

jest -t '<describeString> <itString>'

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