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test: reduce flakiness of test-runner-output.mjs
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This commit is similar to #51952. When the system is under load
it is possible for these timeout tests to become flaky. We
work around that by using a much longer setTimeout() in the test
so that it is not racing against the test's timeout. But, we have
to unref() such a large timeout. And, because test timeouts do
not currently keep the event loop alive, we use a different
setTimeout() for that purpose.

Fixes: #52139
Refs: #52140
PR-URL: #52146
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
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cjihrig authored and marco-ippolito committed May 2, 2024
1 parent 8668159 commit 3a75341
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Showing 2 changed files with 64 additions and 46 deletions.
100 changes: 56 additions & 44 deletions test/fixtures/test-runner/output/lcov_reporter.snapshot
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Expand Up @@ -81,24 +81,26 @@ FN:310,anonymous_77
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Expand Down Expand Up @@ -185,21 +187,23 @@ FNDA:1,anonymous_82
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FNF:101
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Expand Down Expand Up @@ -279,30 +283,32 @@ BRDA:310,75,0,1
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BRF:103
BRH:99
DA:1,1
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Expand Down Expand Up @@ -702,6 +708,12 @@ DA:396,1
DA:397,1
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end_of_record
10 changes: 8 additions & 2 deletions test/fixtures/test-runner/output/output.js
Original file line number Diff line number Diff line change
Expand Up @@ -317,12 +317,18 @@ test('subtest sync throw fails', async (t) => {

test('timed out async test', { timeout: 5 }, async (t) => {
return new Promise((resolve) => {
setTimeout(resolve, 100);
setTimeout(() => {
// Empty timer so the process doesn't exit before the timeout triggers.
}, 5);
setTimeout(resolve, 30_000_000).unref();
});
});

test('timed out callback test', { timeout: 5 }, (t, done) => {
setTimeout(done, 100);
setTimeout(() => {
// Empty timer so the process doesn't exit before the timeout triggers.
}, 5);
setTimeout(done, 30_000_000).unref();
});


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