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test(throttle): assert the trailing call actually fires #365

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nedtwigg merged 1 commit into from
Aug 15, 2026
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test(throttle): assert the trailing call actually fires #365

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6 changes: 5 additions & 1 deletion lib/src/lib/throttle.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -38,9 +38,13 @@ describe('throttleTrailing', () => {
expect(duringBurst).toBeLessThanOrEqual(5);

// Let everything settle — a final trailing call fits the resting geometry.
// Strictly greater than the burst count: the last frame left a trailing
// call pending, so exactly one more fire must land after settling.
// (`> duringBurst - 1` would be `>= duringBurst`, which holds even if no
// trailing call fired, defeating the check.)
vi.advanceTimersByTime(300);
const total = fn.mock.calls.length;
expect(total).toBeGreaterThan(duringBurst - 1);
expect(total).toBeGreaterThan(duringBurst);
expect(total).toBeLessThanOrEqual(5);
});

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