React: No tests found

[omerts]

Trying to run grunt test on version 16.0.0-alpha return no tests found:

[aweary]

@omerts running grunt test on the master branch seems to work fine for me.

[omerts]

@Aweary are you getting test results? FWIW, I am on a windows machine .

[cpb]

I am getting test results on master with archlinux

[aweary]

@omerts have you made any changes locally? I'm on OS X and I do get test results as well.

[zpao]

I'm pretty sure tests used to run fine on Windows. I don't have a VM handy to test myself right now. cc @cpojer in case some of the recent jest upgrades have broken that (perhaps something with haste and the filesystem).

[cpojer]

It should work fine with 12.1.1.

[omerts]

@Aweary, I did make changes, but I get the same no tests found even when switching back to master.

I don't have any experience with jest, I just know that it looks for __tests__. Does it look for it recursively? Because looking at the root directory I don't see any __tests__folder, only in sub-directories. Maybe there is some problem with the directory lookup in windows.

Specs:
Windows 7 64-bit
node v4.4.0
npm v3.8.1

To make sure, I just did a fresh clone as follows:

git clone https://github.com/facebook/react.git
cd react
npm i
grunt build
grunt test

Still same error:

[aweary]

@omerts nice, thanks for the details. Definitely looks like a problem. Someone else running Windows will have to try and reproduce, I can't reproduce at all on OS X.

[cpojer]

We are working on fixing this for the next Jest release. Sorry that this is causing trouble.

[Daniel15]

Hmm... Even when I pass an absolute file path, it still can't find test files:

 .\node_modules\.bin\jest C:\src\react\src\shared\utils\__tests__\KeyEscapeUtils-test.js
Using Jest CLI v12.1.1, jasmine2
No tests found for "C:\src\react\src\shared\utils\__tests__\KeyEscapeUtils-test.js".

I suspect this is an issue in Jest, however I'm currently blocked from easily investigating as Jest doesn't build on Windows due to https://github.com/lerna/lerna/issues/226. I'll investigate more once I get Jest to build properly

[Daniel15]

If I create a brand new project using Jest v12.1.1 and make a single test in __tests__\foo-test.js, it works fine:

Works in a nested directory too (ie. `c:\src\testappwithjest\foobar__tests__\foo-test.js)

I wonder if it has something to do with the configuration in this repository specifically.

[Daniel15]

Found the bug, it only occurs when testFileExtensions is enabled in the Jest config. Moved to Jest repo: https://github.com/facebook/jest/issues/1180

[zpao]

Thanks for finding that @Daniel15!

[andrerpena]

I'm still having this problem on Windows. I suppose jest hasn't been updated to ^13.0.0 on master yet

[andrerpena]

Yes.. updated to 13.0.0 and it now finds 120 tests