[Galaxy uses Vitest](https://vitest.dev/) for its client-side unit testing
framework.

For testing Vue components, we use the [Vue testing
utils](https://vue-test-utils.vuejs.org/) to mount individual components in a
test bed and check them for rendered features. Please use Vitest's mocking
capabilities for isolating test functionality.

### Specific test scenarios & examples

- [Mocking an imported
  dependency](https://github.com/galaxyproject/galaxy/blob/dev/client/src/components/Tags/tagService.test.js)
- [Testing async
  operations](https://github.com/galaxyproject/galaxy/blob/dev/client/src/components/Tags/tagService.test.js)
- [Testing a Vue component for expected rendering
  output](https://github.com/galaxyproject/galaxy/blob/dev/client/src/components/Tags/StatelessTags.test.js)
- [Firing an event against a shallow mounted vue
  component](https://github.com/galaxyproject/galaxy/blob/dev/client/src/components/Tags/StatelessTags.test.js)