Add tests for material banner example (#147733)

Part of flutter/flutter#130459.
engine-flutter-autoroll · May 23, 2024 · 1c1516c · 1c1516c
1 parent 82c3b38
commit 1c1516c
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Showing 2 changed files with 61 additions and 1 deletion.
diff --git a/examples/api/test/material/banner/material_banner.0_test.dart b/examples/api/test/material/banner/material_banner.0_test.dart
@@ -7,6 +7,21 @@ import 'package:flutter_api_samples/material/banner/material_banner.0.dart' as e
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
+  testWidgets('Shows all elements', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.MaterialBannerExampleApp(),
+    );
+
+    expect(find.byType(MaterialBanner), findsOneWidget);
+    expect(find.byType(AppBar), findsOneWidget);
+    expect(find.byType(TextButton), findsNWidgets(2));
+    expect(find.text('Hello, I am a Material Banner'), findsOneWidget);
+    expect(find.text('The MaterialBanner is below'), findsOneWidget);
+    expect(find.text('OPEN'), findsOneWidget);
+    expect(find.text('DISMISS'), findsOneWidget);
+    expect(find.byIcon(Icons.agriculture_outlined), findsOneWidget);
+  });
+
   testWidgets('BottomNavigationBar Updates Screen Content', (WidgetTester tester) async {
     await tester.pumpWidget(
       const example.MaterialBannerExampleApp(),
@@ -18,4 +33,16 @@ void main() {
     expect(find.widgetWithText(TextButton, 'OPEN'), findsOne);
     expect(find.widgetWithText(TextButton, 'DISMISS'), findsOne);
   });
+
+  testWidgets('The banner is below the text saying so', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.MaterialBannerExampleApp(),
+    );
+
+    expect(find.byType(MaterialBanner), findsOneWidget);
+    expect(find.text('The MaterialBanner is below'), findsOneWidget);
+    final double bannerY = tester.getCenter(find.byType(MaterialBanner)).dy;
+    final double textY = tester.getCenter(find.text('The MaterialBanner is below')).dy;
+    expect(bannerY, greaterThan(textY));
+  });
 }
diff --git a/examples/api/test/material/banner/material_banner.1_test.dart b/examples/api/test/material/banner/material_banner.1_test.dart
@@ -3,10 +3,32 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter_api_samples/material/banner/material_banner.1.dart' as example;
+import 'package:flutter_api_samples/material/banner/material_banner.1.dart'
+    as example;
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
+  testWidgets('Shows all elements when needed', (WidgetTester tester) async {
+    await tester.pumpWidget(const example.MaterialBannerExampleApp());
+    await tester.pumpAndSettle();
+    expect(find.text('The MaterialBanner is below'), findsOneWidget);
+    expect(find.text('Show MaterialBanner'), findsOneWidget);
+    expect(find.byType(MaterialBanner), findsNothing);
+    expect(find.text('DISMISS'), findsNothing);
+    expect(find.byIcon(Icons.agriculture_outlined), findsNothing);
+
+    await tester.tap(find.text('Show MaterialBanner'));
+    await tester.pumpAndSettle();
+    expect(find.byType(MaterialBanner), findsOneWidget);
+    expect(find.text('DISMISS'), findsOneWidget);
+    expect(find.byIcon(Icons.agriculture_outlined), findsOneWidget);
+
+    final MaterialBanner banner = tester.widget<MaterialBanner>(
+      find.byType(MaterialBanner),
+    );
+    expect(banner.backgroundColor, Colors.green);
+  });
+
   testWidgets('BottomNavigationBar Updates Screen Content', (WidgetTester tester) async {
     await tester.pumpWidget(
       const example.MaterialBannerExampleApp(),
@@ -20,6 +42,17 @@ void main() {
     expect(find.text('Hello, I am a Material Banner'), findsOne);
     expect(find.byIcon(Icons.agriculture_outlined), findsOne);
     expect(find.widgetWithText(TextButton, 'DISMISS'), findsOne);
+  });
+
+  testWidgets('The banner is below the text saying so', (WidgetTester tester) async {
+    await tester.pumpWidget(const example.MaterialBannerExampleApp());
+    await tester.tap(find.text('Show MaterialBanner'));
+    await tester.pumpAndSettle();
 
+    expect(find.byType(MaterialBanner), findsOneWidget);
+    expect(find.text('The MaterialBanner is below'), findsOneWidget);
+    final double bannerY = tester.getCenter(find.byType(MaterialBanner)).dy;
+    final double textY = tester.getCenter(find.text('The MaterialBanner is below')).dy;
+    expect(bannerY, greaterThan(textY));
   });
 }