From 1c1516c35e69163f07f89240ceadc771d5799f46 Mon Sep 17 00:00:00 2001
From: derdilla <82763757+NobodyForNothing@users.noreply.github.com>
Date: Thu, 23 May 2024 20:48:09 +0200
Subject: [PATCH] Add tests for material banner example (#147733)

Part of https://github.com/flutter/flutter/issues/130459.
---
 .../banner/material_banner.0_test.dart        | 27 ++++++++++++++
 .../banner/material_banner.1_test.dart        | 35 ++++++++++++++++++-
 2 files changed, 61 insertions(+), 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
index 7080e7d91f..68b14c6248 100644
--- 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
index c3d1e5b5ce..0d65238377 100644
--- 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));
   });
 }