Add:创建 flutter go web 版

2025-07-14 18:02:49 +08:00 · 2019-08-13 20:38:46 +08:00
parent 64513b59c1
commit da67ccf5a8
1656 changed files with 483653 additions and 0 deletions
--- a/packages/flutter_web/test/material/scrollbar_test.dart
+++ b/packages/flutter_web/test/material/scrollbar_test.dart
@ -0,0 +1,143 @@
+// Copyright 2016 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/material.dart';
+import 'package:flutter_web/scheduler.dart';
+import 'package:flutter_web_test/flutter_web_test.dart';
+
+class TestCanvas implements Canvas {
+  TestCanvas([this.invocations]);
+
+  final List<Invocation> invocations;
+
+  @override
+  void noSuchMethod(Invocation invocation) {
+    invocations?.add(invocation);
+  }
+}
+
+void main() {
+  testWidgets('Scrollbar doesn\'t show when tapping list',
+      (WidgetTester tester) async {
+    await tester.pumpWidget(Directionality(
+      textDirection: TextDirection.ltr,
+      child: Center(
+        child: Container(
+          decoration:
+              BoxDecoration(border: Border.all(color: const Color(0xFFFFFF00))),
+          height: 200.0,
+          width: 300.0,
+          child: Scrollbar(
+            child: ListView(
+              children: <Widget>[
+                Container(height: 40.0, child: const Text('0')),
+                Container(height: 40.0, child: const Text('1')),
+                Container(height: 40.0, child: const Text('2')),
+                Container(height: 40.0, child: const Text('3')),
+                Container(height: 40.0, child: const Text('4')),
+                Container(height: 40.0, child: const Text('5')),
+                Container(height: 40.0, child: const Text('6')),
+                Container(height: 40.0, child: const Text('7')),
+              ],
+            ),
+          ),
+        ),
+      ),
+    ));
+
+    SchedulerBinding.instance.debugAssertNoTransientCallbacks(
+        'Building a list with a scrollbar triggered an animation.');
+    await tester.tap(find.byType(ListView));
+    SchedulerBinding.instance.debugAssertNoTransientCallbacks(
+        'Tapping a block with a scrollbar triggered an animation.');
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.drag(find.byType(ListView), const Offset(0.0, -10.0));
+    expect(SchedulerBinding.instance.transientCallbackCount, greaterThan(0));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+  });
+
+  testWidgets('ScrollbarPainter does not divide by zero',
+      (WidgetTester tester) async {
+    await tester.pumpWidget(Directionality(
+      textDirection: TextDirection.ltr,
+      child: Container(
+        height: 200.0,
+        width: 300.0,
+        child: Scrollbar(
+          child: ListView(
+            children: <Widget>[
+              Container(height: 40.0, child: const Text('0')),
+            ],
+          ),
+        ),
+      ),
+    ));
+
+    final CustomPaint custom = tester.widget(find
+        .descendant(
+            of: find.byType(Scrollbar), matching: find.byType(CustomPaint))
+        .first);
+    final dynamic scrollPainter = custom.foregroundPainter;
+    // Dragging makes the scrollbar first appear.
+    await tester.drag(find.text('0'), const Offset(0.0, -10.0));
+    await tester.pump(const Duration(milliseconds: 200));
+    await tester.pump(const Duration(milliseconds: 200));
+
+    final ScrollMetrics metrics = FixedScrollMetrics(
+        minScrollExtent: 0.0,
+        maxScrollExtent: 0.0,
+        pixels: 0.0,
+        viewportDimension: 100.0,
+        axisDirection: AxisDirection.down);
+    scrollPainter.update(metrics, AxisDirection.down);
+
+    final List<Invocation> invocations = <Invocation>[];
+    final TestCanvas canvas = TestCanvas(invocations);
+    scrollPainter.paint(canvas, const Size(10.0, 100.0));
+    final Rect thumbRect = invocations.single.positionalArguments[0];
+    expect(thumbRect.isFinite, isTrue);
+  });
+
+  // TODO(flutter_web): Renable, Web doesn't support Platform.iOS yet.
+//  testWidgets('Adaptive scrollbar', (WidgetTester tester) async {
+//    Widget viewWithScroll(TargetPlatform platform) {
+//      return Directionality(
+//        textDirection: TextDirection.ltr,
+//        child: Theme(
+//          data: ThemeData(
+//              platform: platform
+//          ),
+//          child: Scrollbar(
+//            child: SingleChildScrollView(
+//              child: const SizedBox(width: 4000.0, height: 4000.0),
+//            ),
+//          ),
+//        ),
+//      );
+//    }
+//
+//    await tester.pumpWidget(viewWithScroll(TargetPlatform.android));
+//    await tester.drag(find.byType(SingleChildScrollView), const Offset(0.0, -10.0));
+//    await tester.pump();
+//    // Scrollbar fully showing
+//    await tester.pump(const Duration(milliseconds: 500));
+//    expect(find.byType(Scrollbar), paints..rect());
+//
+//    await tester.pumpWidget(viewWithScroll(TargetPlatform.iOS));
+//    final TestGesture gesture = await tester.startGesture(
+//        tester.getCenter(find.byType(SingleChildScrollView))
+//    );
+//    await gesture.moveBy(const Offset(0.0, -10.0));
+//    await tester.drag(find.byType(SingleChildScrollView), const Offset(0.0, -10.0));
+//    await tester.pump();
+//    await tester.pump(const Duration(milliseconds: 200));
+//    expect(find.byType(Scrollbar), paints..rrect());
+//  });
+}