HELP PLEASE! Flutter tests of Tab Bar

[Federico Mestrone]

Hi all,

I have a very simple tab bar

appBar: AppBar(
bottom: TabBar(
tabs: [
Tab(icon: Icon(Icons.toc)),
Tab(icon: Icon(Icons.school)),
Tab(icon: Icon(Icons.connect_without_contact)),
Tab(icon: Icon(Icons.mail_outline)),
],
),
title: Text('MyApp'),
)

and I want to test that each tab opens up the right view. I have tried all sorts but without luck

testWidgets('Click on lesson tab', (WidgetTester tester) async {
// Build our app and trigger a frame.
await tester.pumpWidget(MyAppTabHome());

var v = find.byType(Tab).at(1);
await tester.tap(v);
await tester.pump();

expect(find.text('L1'), findsOneWidget);
expect(find.text('L2'), findsOneWidget);
expect(find.text('L3'), findsOneWidget);
expect(find.text('L4'), findsOneWidget);
});

Am I doing it wrong?

Thanks

Fed

[Federico Mestrone]

I have also tried the following, of course to no avail

var v = find.byIcon(Icons.school);

[Suzuki Tomohiro]

What's the unexpected?

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[Federico Mestrone]

When I open the second tab, there should be four Text widgets, with "L1" "L2" "L3" "L4" respectively, but the test fails, cannot find the Text widgets

══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════

The following TestFailure object was thrown running a test:

  Expected: exactly one matching node in the widget tree

  Actual: _TextFinder:<zero widgets with text "L1" (ignoring offstage widgets)>

   Which: means none were found but one was expected