How can I validate in the build Owl app that the Owl test is running

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Code of Conduct

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### Question

```markdown
How can I validate in the build Owl app that the Owl test is running? the reason I ask this is; I want to visually test components separately and that could be done with for example an env variable.

So is there an env variable or something else I can use?

I have checked the documentation and code base but I could not find a solution. If it's not available yet i can make a PR with this option.
```