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Fix flaky 'micro formats years' test #342

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siddharthkp merged 1 commit into from
Feb 17, 2026
Merged

Fix flaky 'micro formats years' test #342

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9 changes: 5 additions & 4 deletions test/relative-time.js
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Original file line number Diff line number Diff line change
Expand Up @@ -523,14 +523,15 @@ suite('relative-time', function () {
})

test('micro formats years', async () => {
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Copilot AI Feb 17, 2026

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This test name is identical to the [tense=future] suite's micro formats years test later in the file, which can make failures harder to distinguish in test output/search. Renaming to include the tense (e.g., "micro formats years (past)") would make reporting clearer.

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test('micro formats years', async () => {
test('micro formats years (past)', async () => {

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const datetime = new Date()
datetime.setFullYear(datetime.getFullYear() - 10)
// FIXME: there is still a bug, if the duration is long enough (say, 10 or 100 years)
// then the `month = Math.floor(day / 30)` in elapsedTime causes errors, then "10 years" would output "11y"
Comment on lines +526 to +527
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Copilot AI Feb 17, 2026

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The FIXME/comment calls out the 10-year failure case ("10 years" -> "11y"), but this test now uses a 2-year offset and asserts 2y. Tweaking the comment to explicitly say the test uses a shorter duration to avoid the known long-duration rounding bug would make the intent clearer.

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// FIXME: there is still a bug, if the duration is long enough (say, 10 or 100 years)
// then the `month = Math.floor(day / 30)` in elapsedTime causes errors, then "10 years" would output "11y"
// FIXME: there is still a bug if the duration is long enough (say, 10 or 100 years):
// the `month = Math.floor(day / 30)` in elapsedTime causes errors, so "10 years" would output "11y".
// This test intentionally uses a shorter 2-year duration to exercise year micro-formatting ("2y")
// without triggering that known long-duration rounding bug.

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const now = new Date(Date.now() - 2 * 365 * 24 * 60 * 60 * 1000).toISOString()
const time = document.createElement('relative-time')
time.setAttribute('tense', 'past')
time.setAttribute('datetime', datetime)
time.setAttribute('datetime', now)
time.setAttribute('format', 'micro')
Comment on lines +528 to 532
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Copilot AI Feb 17, 2026

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The now variable here is actually the target past datetime being set on the element, not the current time. Renaming it to something like datetime/pastDatetime would make the test easier to follow and reduce confusion with other tests that use now for the current timestamp.

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await Promise.resolve()
assert.equal(time.shadowRoot.textContent, '10y')
assert.equal(time.shadowRoot.textContent, '2y')
})

test('micro formats future times', async () => {
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