Add:创建 flutter go web 版

packages/flutter_web/test/widgets/app_overrides_test.dart

@@ -0,0 +1,97 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter_web_test/flutter_web_test.dart';
+import 'package:flutter_web/widgets.dart';
+
+class TestRoute<T> extends PageRoute<T> {
+  TestRoute({this.child, RouteSettings settings}) : super(settings: settings);
+
+  final Widget child;
+
+  @override
+  Duration get transitionDuration => const Duration(milliseconds: 150);
+
+  @override
+  Color get barrierColor => null;
+
+  @override
+  String get barrierLabel => null;
+
+  @override
+  bool get maintainState => false;
+
+  @override
+  Widget buildPage(BuildContext context, Animation<double> animation,
+      Animation<double> secondaryAnimation) {
+    return child;
+  }
+}
+
+Future<void> pumpApp(WidgetTester tester) async {
+  await tester.pumpWidget(
+    WidgetsApp(
+      color: const Color(0xFF333333),
+      onGenerateRoute: (RouteSettings settings) {
+        return TestRoute<void>(settings: settings, child: Container());
+      },
+    ),
+  );
+}
+
+void main() {
+  testWidgets('WidgetsApp control test', (WidgetTester tester) async {
+    await pumpApp(tester);
+    expect(find.byType(WidgetsApp), findsOneWidget);
+    expect(find.byType(Navigator), findsOneWidget);
+    expect(find.byType(PerformanceOverlay), findsNothing);
+    expect(find.byType(CheckedModeBanner), findsOneWidget);
+  });
+
+  testWidgets('showPerformanceOverlayOverride true',
+      (WidgetTester tester) async {
+    expect(WidgetsApp.showPerformanceOverlayOverride, false);
+    // WidgetsApp.showPerformanceOverlayOverride = true;
+    await pumpApp(tester);
+    expect(find.byType(WidgetsApp), findsOneWidget);
+    expect(find.byType(Navigator), findsOneWidget);
+    // TODO(flutter_web): enable when PerformanceOverlay is supported.
+    // expect(find.byType(PerformanceOverlay), findsOneWidget);
+    expect(find.byType(CheckedModeBanner), findsOneWidget);
+  });
+
+  testWidgets('showPerformanceOverlayOverride false',
+      (WidgetTester tester) async {
+    // TODO(flutter_web): enable when PerformanceOverlay is supported.
+    // expect(WidgetsApp.showPerformanceOverlayOverride, true);
+    WidgetsApp.showPerformanceOverlayOverride = false;
+    await pumpApp(tester);
+    expect(find.byType(WidgetsApp), findsOneWidget);
+    expect(find.byType(Navigator), findsOneWidget);
+    expect(find.byType(PerformanceOverlay), findsNothing);
+    expect(find.byType(CheckedModeBanner), findsOneWidget);
+  });
+
+  testWidgets('debugAllowBannerOverride false', (WidgetTester tester) async {
+    expect(WidgetsApp.showPerformanceOverlayOverride, false);
+    expect(WidgetsApp.debugAllowBannerOverride, true);
+    WidgetsApp.debugAllowBannerOverride = false;
+    await pumpApp(tester);
+    expect(find.byType(WidgetsApp), findsOneWidget);
+    expect(find.byType(Navigator), findsOneWidget);
+    expect(find.byType(PerformanceOverlay), findsNothing);
+    expect(find.byType(CheckedModeBanner), findsNothing);
+  });
+
+  testWidgets('debugAllowBannerOverride true', (WidgetTester tester) async {
+    expect(WidgetsApp.showPerformanceOverlayOverride, false);
+    expect(WidgetsApp.debugAllowBannerOverride, false);
+    WidgetsApp.debugAllowBannerOverride = true;
+    await pumpApp(tester);
+    expect(find.byType(WidgetsApp), findsOneWidget);
+    expect(find.byType(Navigator), findsOneWidget);
+    expect(find.byType(PerformanceOverlay), findsNothing);
+    expect(find.byType(CheckedModeBanner), findsOneWidget);
+  });
+}