pumpUntilNotFound function

Future<void> pumpUntilNotFound(WidgetTester tester, Finder finder, { Duration timeout = const Duration(seconds: 10), Duration step = const Duration(milliseconds: 50), })

Pumps in a loop until finder is no longer found.

This is useful for waiting for transient UI (loading spinners, snackbars, dialogs) to be removed.

The timeout is measured in pumped time (sum of step durations), making it deterministic under FakeAsync widget tests.

Implementation

Future<void> pumpUntilNotFound(
  WidgetTester tester,
  Finder finder, {
  Duration timeout = const Duration(seconds: 10),
  Duration step = const Duration(milliseconds: 50),
}) async {
  var elapsed = Duration.zero;
  while (elapsed < timeout) {
    await tester.pump(step);
    if (!tester.any(finder)) {
      return;
    }
    elapsed += step;
  }

  // One last pump to give a more stable failure state.
  await tester.pump();
  expect(
    tester.any(finder),
    isFalse,
    reason: 'Timed out waiting for widget to be removed: $finder',
  );
}