87 lines
2.6 KiB
Dart
87 lines
2.6 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:marianum_mobile/widget/route_transition_gate.dart';
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void main() {
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const gated = Key('gated-child');
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const placeholder = Key('gate-placeholder');
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Widget gatedPage() => Scaffold(
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body: RouteTransitionGate(
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placeholder: const SizedBox(key: placeholder),
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builder: (_) => const SizedBox(key: gated),
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),
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);
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Future<void> pumpApp(WidgetTester tester) async {
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await tester.pumpWidget(
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MaterialApp(home: Builder(builder: (_) => const Scaffold())),
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);
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}
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NavigatorState navigator(WidgetTester tester) =>
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tester.state<NavigatorState>(find.byType(Navigator));
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testWidgets('shows placeholder during push, child once settled', (
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tester,
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) async {
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await pumpApp(tester);
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unawaited(
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navigator(tester).push(MaterialPageRoute<void>(builder: (_) => gatedPage())),
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);
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await tester.pump();
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await tester.pump(const Duration(milliseconds: 50));
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expect(find.byKey(placeholder), findsOneWidget);
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expect(find.byKey(gated), findsNothing);
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await tester.pumpAndSettle();
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expect(find.byKey(gated), findsOneWidget);
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expect(find.byKey(placeholder), findsNothing);
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});
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testWidgets('swaps back to placeholder while the route pops', (tester) async {
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await pumpApp(tester);
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unawaited(
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navigator(tester).push(MaterialPageRoute<void>(builder: (_) => gatedPage())),
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);
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await tester.pumpAndSettle();
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expect(find.byKey(gated), findsOneWidget);
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navigator(tester).pop();
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await tester.pump();
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await tester.pump(const Duration(milliseconds: 50));
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expect(find.byKey(gated), findsNothing);
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expect(find.byKey(placeholder), findsOneWidget);
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});
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testWidgets('gates during a secondary transition and recovers after pop', (
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tester,
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) async {
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await pumpApp(tester);
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unawaited(
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navigator(tester).push(MaterialPageRoute<void>(builder: (_) => gatedPage())),
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);
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await tester.pumpAndSettle();
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expect(find.byKey(gated), findsOneWidget);
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unawaited(
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navigator(tester).push(MaterialPageRoute<void>(builder: (_) => const Scaffold())),
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);
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await tester.pump();
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await tester.pump(const Duration(milliseconds: 50));
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// Mid secondary transition the fragile subtree must be unmounted.
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expect(find.byKey(gated), findsNothing);
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await tester.pumpAndSettle();
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navigator(tester).pop();
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await tester.pumpAndSettle();
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// Back at rest on the gated route: child is mounted again.
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expect(find.byKey(gated), findsOneWidget);
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expect(find.byKey(placeholder), findsNothing);
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});
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}
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