pump and settle

Drive animated tests with pump and pumpAndSettle.

pump and pumpAndSettle

pump advances a single frame; pumpAndSettle advances frames until all animations and timers complete. When testing animated widgets, you advance time with pump(Duration) and then verify with expect.

await tester.pumpWidget(MyAnimatedWidget());
await tester.pump(const Duration(seconds: 1));
await tester.pumpAndSettle();
expect(find.text('Done'), findsOneWidget);

pump with Duration

pump(Duration) triggers the frames within a given duration, letting you test intermediate animation states. pumpAndSettle advances in 100ms intervals until animations are done.

Exercise Animated test

In main, write a testWidgets test named 'animasyon biter'. Render MaterialApp(home: Text('Bitti')) with pumpWidget. Call pumpAndSettle. Verify with find.text('Bitti') and findsOneWidget. Finally print 'test tanimlandi'.

Show example solution

import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';

void main() {
  testWidgets('animasyon biter', (tester) async {
    await tester.pumpWidget(
      const MaterialApp(home: Text('Bitti')),
    );
    await tester.pumpAndSettle();
    expect(find.text('Bitti'), findsOneWidget);
  });
  print('test tanimlandi');
}

Test yourself

What does pumpAndSettle do?
- Renders the widget
- Advances until all animations and timers complete
- Stops the test
- Advances one frame
Show answer

Advances until all animations and timers complete — pumpAndSettle keeps advancing frames until there are no more changes; it waits for animations to finish.

pumpAndSettle call

await tester.____();

Show answer

await tester.pumpAndSettle();

pump matches

pump

Advances one frame
pumpAndSettle

Advances until animations complete
Duration

Time interval
pumpWidget

Initial render

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