Tests fail the first time if the build is uncached

[aaronjensen]

I get fairly random errors when I attempt to run tests with cleared vite cache. If I refresh, it's all fine and my tests run and pass no problem.

Here's an example error:

I also sometimes see an error saying that some modules do not have a default export (like assert)

Have you seen this before? Any suggestions?

Thanks!

[aaronjensen]

Here's another error I see sometimes:

[aaronjensen]

I can fix these by including my test dependencies in optimizeDeps:

  optimizeDeps: {
    // These must be included when running tests or the first test run on an
    // uncached build will fail
    include: [
      "assert",
      "@testing-library/react",
      "@testing-library/react/dont-cleanup-after-each",
    ],
  },

So perhaps this is a vite limitation? I wonder if there's something else I'm missing...

[betaboon]

i have not seen that behavior before. maybe you can provide a repro?

[aaronjensen]

Sure, here you go... hopefully you can repro with it https://github.com/aaronjensen/vite-test-repro

[betaboon]

@aaronjensen thanks for the repro. i can reproduce it. i do believe this issue is due to vite. eg see this issue: https://github.com/vitejs/vite/issues/2579#issuecomment-841770842

[aaronjensen]

Okay, thank you. I'll just wait then.