Pending timer exception on widget test

[jv-soares]

Im getting the following exception whenever writing a simple widget test for the speed dial

The following assertion was thrown running a test:
A Timer is still pending even after the widget tree was disposed.
'package:flutter_test/src/binding.dart':
Failed assertion: line 1498 pos 12: '!timersPending'

Here is the widget test

void main() {
  testWidgets('should find speed dial', (widgetTester) async {
    await widgetTester.pumpWidget(
      const MaterialApp(
        home: Scaffold(floatingActionButton: SpeedDial()),
      ),
    );

    final finder = find.byType(SpeedDial);

    expect(finder, findsOneWidget);
  });
}

And here is the full log message

Pending timers:
Timer (duration: 0:00:00.000000, periodic: false), created:
#0      new FakeTimer._ (package:fake_async/fake_async.dart:308:62)
#1      FakeAsync._createTimer (package:fake_async/fake_async.dart:252:27)
#2      FakeAsync.run.<anonymous closure> (package:fake_async/fake_async.dart:185:19)
#6      _SpeedDialState.initState (package:flutter_speed_dial/src/speed_dial.dart:243:12)
#7      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5219:55)
#8      ComponentElement.mount (package:flutter/src/widgets/framework.dart:5062:5)
...     Normal element mounting (23 frames)
#31     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3971:16)
#32     MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6570:36)
#33     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6582:32)
...     Normal element mounting (21 frames)
#54     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3971:16)
#55     MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6570:36)
#56     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6582:32)
...     Normal element mounting (324 frames)
#380    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3971:16)
#381    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6570:36)
#382    MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6582:32)
...     Normal element mounting (435 frames)
#817    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3971:16)
#818    Element.updateChild (package:flutter/src/widgets/framework.dart:3702:20)
#819    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#820    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#821    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#822    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#823    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#824    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5251:11)
#825    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#826    StatefulElement.update (package:flutter/src/widgets/framework.dart:5274:5)
#827    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#828    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#829    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#830    ProxyElement.update (package:flutter/src/widgets/framework.dart:5417:5)
#831    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#832    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5111:16)
#833    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#834    StatelessElement.update (package:flutter/src/widgets/framework.dart:5162:5)
#835    Element.updateChild (package:flutter/src/widgets/framework.dart:3686:15)
#836    RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1240:16)
#837    RenderObjectToWidgetElement.update (package:flutter/src/widgets/binding.dart:1217:5)
#838    RenderObjectToWidgetElement.performRebuild (package:flutter/src/widgets/binding.dart:1231:7)
#839    Element.rebuild (package:flutter/src/widgets/framework.dart:4805:7)
#840    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2780:19)
#841    AutomatedTestWidgetsFlutterBinding.drawFrame (package:flutter_test/src/binding.dart:1386:19)
#842    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:358:5)
#843    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1284:15)
#844    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1214:9)
#845    AutomatedTestWidgetsFlutterBinding.pump.<anonymous closure> (package:flutter_test/src/binding.dart:1236:9)
#848    TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:68:41)
#849    AutomatedTestWidgetsFlutterBinding.pump (package:flutter_test/src/binding.dart:1222:27)
#850    WidgetTester._pumpWidget (package:flutter_test/src/widget_tester.dart:592:20)
#851    WidgetTester.pumpWidget.<anonymous closure> (package:flutter_test/src/widget_tester.dart:577:14)
#854    TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:68:41)
#855    WidgetTester.pumpWidget (package:flutter_test/src/widget_tester.dart:576:27)
#856    main.<anonymous closure> (file:///Users/aparkado/dev/apps_flutter/lkw_app/test/speed_dial_test.dart:7:24)
#857    testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:170:29)
<asynchronous suspension>
<asynchronous suspension>
(elided 8 frames from dart:async and package:stack_trace)

══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following assertion was thrown running a test:
A Timer is still pending even after the widget tree was disposed.
'package:flutter_test/src/binding.dart':
Failed assertion: line 1498 pos 12: '!timersPending'

When the exception was thrown, this was the stack:
#2      AutomatedTestWidgetsFlutterBinding._verifyInvariants (package:flutter_test/src/binding.dart:1498:12)
#3      TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:1003:7)
<asynchronous suspension>
(elided 2 frames from class _AssertionError)