Unit Testing in React JS using Jest

Question

I trying to do unit testing in a react application in which I want to test only one component.

What is the command for running the test of particular component?

I am doing this way for testing.

npm test -- --testPathPattern components

I have all the *.test.js inside the components folder.

Above command will run the test cases for all the test files under the components folder but I want to run the tests only for the specific component.

If you're using vscode, you can install jest runner extension, after that you can easily run a single test or a test suite (when you have your test file open, it'd show debug and run commands on top of test case declaration). Plus it'll show you in its integrated terminal, the command it's running. — pritam
– pritam, Commented Oct 3, 2020 at 11:34
That's a good idea. I'll follow up on this. Its jest runner extension right? — Karan Tech
– Karan Tech, Commented Oct 3, 2020 at 11:40

Subrato Pattanaik · Accepted Answer · 2020-10-03 11:48:18Z

2

You can use the below command for testing only one component (file_name.test.js in below example)

npm test src/components/file_name.test.js

OR in a simple way,

npm test -- file_name.test.js

Both commands will work. There are more ways for unit testing of an individual component. You can find it here.

npm test -- --help

answered Oct 3, 2020 at 11:38

Subrato Pattanaik

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Comments

Muthusankar B · Accepted Answer · 2022-05-17 09:00:04Z

0

testing only one component

npm t -- filename.ts or js

edited May 17, 2022 at 9:00

answered May 17, 2022 at 8:59

Muthusankar B

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