The calendar test asserted `[data-date=day] .tevent` had a count of exactly one —
the mocked meeting — after dragging its task to the next day. That count assumed
the day held nothing but this test's own events. It does not: the suite shares one
database, and an earlier test drags a task across a month boundary, which on some
dates lands a timed task on this very day. A timed task renders as a `.tevent`
too, so the count was two, and the test failed — but only in the full run, and
only when the date arithmetic put the two tests on the same cell. Alone it passed,
which is exactly the shape of a shared-state collision rather than a real bug.
Named, not counted: assert the meeting is still there and the task is no longer in
the day's column, which is what "the events stayed, the task moved" actually
means — and is true however full another test left the day. Same for the all-day
band. No product code changed; the drag and everything it checks are untouched.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
