Jest tests not working in basic new sandbox.

[Neutrino-Sunset]

Description of the problem

Jest tests do not work as described in the documentation here

How has this issue affected you? What are you trying to accomplish?

I'm trying to run a test and it isn't being detected.

To Reproduce

Create a sandbox using the official Vanilla JS template.
Add a Javascript file named .test.js containing a test.

Expected

The test should be detected and run.

Actual

Nothing happens at all.

Link to sandbox: link (optional)

https://codesandbox.io/s/import-tests-ci7zc

The sandbox looks screwed up to me. I created it from the VanillaJS template but the Sandbox Info pane suggests it's come from the Node HTTP Server template, and the Server Control Panel pane suggests it's running in a server container. But the sandbox has a plain index.js that was generated by the template.

Makes no sense to me at all.

Your Environment

Software	Name/Version
Сodesandbox	Where would I get that from?
Browser	Firefox 80.0.1
Operating System	Win 10

[Neutrino-Sunset]

Here's a sandbox that does actually recognise what template it came from, same issue. No tests.

https://codesandbox.io/s/recursing-beaver-mzv32

[SaraVieira]

Hey!

There seems to have been an issue with the first one since at the moment we do not support tests in node sandboxes

In the second one, you mentioned the tests do appear

[SaraVieira]

The first one does have nodemon as a dependency so I think we got the fact it was a node sandbox from there

[Neutrino-Sunset]

The point about the first sandbox though was that I created it from the VanillaJS template. How it ended up as a Node Server with an index.html I have no idea.

Does the second sandbox work for you in Firefox? For me it works on Chrome (tests appear and run), does not work on Firefox, tested on two machines with Firefox 80.0.1 in safe mode.

[SaraVieira]

The only explanation I have is that you must have created a sandbox from node instead of vanilla since it contains all the files and dependencies of the normal node sandbox you can see here: https://codesandbox.io/s/node

About the other issue, we are aware and it's in our backlog to fix as of today the tests do not work on Firefox and you can see the explanation here: #4303 (comment)

Closing this issue as it is a duplicate of the issue mentioned above, please follow that issue for updates
#4303