test: fix failure in test/sequential/test-heapdump.js
#41772
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The test was failing when it was being run with superuser privileges, so this changes the test from attempting to write to a read-only file to attempting to write to a file with the same name as that of an existing directory, as that is a more reliable way of making v8.writeHeapSnapshot() throw even when run with sudo. Fixes: nodejs#41643 Signed-off-by: Darshan Sen <[email protected]>
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Looks like maybe this change makes it fail on Windows? |
Because we're in a test tmpdir and those are all cleaned up by test.py, it's not strictly necessary and we don't do that in most tests. We do make an exception for large files and try to clean those up. |
Signed-off-by: Darshan Sen <[email protected]>
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@Trott yes that happens because the writeHeapSnapshot() implementation uses things like fopen() instead of uv_fs_open() underneath. Added a TODO. |
| const readonlyFile = 'ro'; | ||
| fs.writeFileSync(readonlyFile, Buffer.alloc(0), { mode: 0o444 }); | ||
| const directory = 'directory'; | ||
| fs.mkdirSync(directory); |
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I don't think this change will keep the test content as same as before
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@mawaregetsuka Yes but the intention is still the same. If you go through the PR description where this was introduced - #41373, it mentions:
this PR makes v8.writeHeapSnapshot throw if the file could not be written
So the current test still attempts to recreate a scenario where the function won't be able to write to the file, so we expect it to throw.
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Thank you, now I understand. That's a clever solution
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@nodejs/testing |
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Can this get a review please? |
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Landed in 82181bb |
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This doesn't land on 17.x, and it looks like it's because it's modifying code added in a semver-major, so I'm adding the |
The test was failing when it was being run with superuser privileges, so this changes the test from attempting to write to a read-only file to attempting to write to a file with the same name as that of an existing directory, as that is a more reliable way of making v8.writeHeapSnapshot() throw even when run with sudo. Fixes: nodejs#41643 Signed-off-by: Darshan Sen <[email protected]> PR-URL: nodejs#41772 Reviewed-By: Antoine du Hamel <[email protected]>
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This depends on #41373, which can not be included in v16.x |
The test was failing when it was being run with superuser privileges,
so this changes the test from attempting to write to a read-only file to
attempting to write to a file with the same name as that of an existing
directory, as that is a more reliable way of making
v8.writeHeapSnapshot()throw even when run withsudo.Fixes: #41643
Signed-off-by: Darshan Sen [email protected]