How to run a single test file with Karma/Jasmine?

Question

I'm using Karma and Jasmine for testing my Angular JS code. I managed to run all the tests in my project using Karma, but if I try to run just a single file I'm getting the following error: ReferenceError: describe is not defined. Is it possible to run just a single test file and if yes then how?

P.S. I'm using Intellij IDEA.

Solution

Although it's not ideal, you can replace describe (and it) with fdescribe (and fit) so only those tests will be executed

On the other hand, xdescribe / xit excludes the tests from your suite

If you use Gulp, you can combine gulp-karma & yargs to pass in a pattern as argument.

source: https://stackoverflow.com/a/27696472/1782659

Comments

[Anton Belev]

That's not an option : ) we have 3500+ tests. The idea is if you've just included a new test file and you want to run just this one. So far the only way is to comment out all the other test files from the karma.conf.js file.

[Pieter Willaert]

the -f- option (focus) does just that (don't forget to remove it again before you commit)

[Jason]

Blech. it.only and describe.only are so much more intuitive. This worked, however. Thank you.

[Lee Jensen]

Here is a good post (JSGuy) about this functionality.

[Emir Herrera]

So far a remember there is a lint setting or something like that to avoid commit focussed test commits.