Add:创建 flutter go web 版

packages/flutter_web_test/test/widget_tester_test.dart

@@ -0,0 +1,58 @@
+import 'package:flutter_web/material.dart';
+import 'package:flutter_web_test/flutter_web_test.dart';
+
+void main() {
+  group('testWidgets', () {
+    int counter = 0;
+
+    testWidgets('calls the callback', (WidgetTester tester) async {
+      expect(tester, isNotNull);
+      counter++;
+    });
+
+    test('callback is called exactly once', () {
+      expect(counter, 1);
+    });
+
+    testWidgets('renders a widget via pumpWidget', (WidgetTester tester) async {
+      expect(find.text('Test starting...'), findsOneWidget);
+
+      await tester.pumpWidget(_TestWidget());
+
+      expect(find.text('hi'), findsOneWidget);
+    });
+  });
+
+  group(WidgetTester, () {
+    testWidgets('pumps frames with correct timestamps',
+        (WidgetTester tester) async {
+      await tester.pumpWidget(Directionality(
+        textDirection: TextDirection.ltr,
+        child: Text(''),
+      ));
+
+      const oneFrame = Duration(milliseconds: 16);
+      final timestampLog = <Duration>[];
+      final expectedLog = <Duration>[oneFrame];
+
+      SchedulerBinding.instance.scheduleFrameCallback(timestampLog.add);
+      await tester.pump(oneFrame);
+      expect(timestampLog, expectedLog);
+
+      expectedLog.add(Duration(milliseconds: 1016));
+      SchedulerBinding.instance.scheduleFrameCallback(timestampLog.add);
+      await tester.pump(Duration(milliseconds: 1000));
+      expect(timestampLog, expectedLog);
+    });
+  });
+}
+
+class _TestWidget extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Directionality(
+      textDirection: TextDirection.ltr,
+      child: Text('hi'),
+    );
+  }
+}