test(media): inject the failed registry write instead of chmod-ing the temp dir - #280
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…e temp dir "logs a refresh it cannot write" arranged its failure with `chmod(tempDir, 0o555)`. That is not a portable way to make a write fail: on Windows the bit lands on a directory attribute that does not stop a file being created inside, so the refresh succeeded, nothing warned, and the case failed on every Windows dev machine. `skipIf(process.getuid?.() === 0)` could not catch it either — `getuid` is undefined there, so the guard read as "not root" and ran anyway. CI only runs the suite on ubuntu-latest, so this stayed green there while being permanently red locally — which is the worst shape a test can have: it teaches you to skim past a red suite on the machine the app is actually developed on. The write is now failed by injection (`vi.spyOn(fs, "writeFile")`), which asserts the same thing on every platform and at any privilege level, and the spy is asserted to have been called so the case cannot pass with the refresh path deleted. Verified by ablation: dropping the `.catch()` in findMediaLinksByFingerprint still turns it red, with the rejection escaping as the unhandled one it exists to prevent.
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📝 WalkthroughWalkthroughThe refresh failure test now mocks ChangesMedia refresh failure handling
Estimated code review effort: 2 (Simple) | ~10 minutes Possibly related PRs
Suggested reviewers: ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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"logs a refresh it cannot write" arranged its failure with
chmod(tempDir, 0o555). That is not a portable way to make a write fail: on Windows the bitlands on a directory attribute that does not stop a file being created inside,
so the refresh succeeded, nothing warned, and the case failed on every Windows
dev machine.
skipIf(process.getuid?.() === 0)could not catch it either —getuidis undefined there, so the guard read as "not root" and ran anyway.CI only runs the suite on ubuntu-latest, so this stayed green there while being
permanently red locally — which is the worst shape a test can have: it teaches
you to skim past a red suite on the machine the app is actually developed on.
The write is now failed by injection (
vi.spyOn(fs, "writeFile")), whichasserts the same thing on every platform and at any privilege level, and the
spy is asserted to have been called so the case cannot pass with the refresh
path deleted. Verified by ablation: dropping the
.catch()infindMediaLinksByFingerprint still turns it red, with the rejection escaping as
the unhandled one it exists to prevent.
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