feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

mobile/test/shared/widgets/skeleton_test.dart

@@ -0,0 +1,186 @@
+import 'package:buzz/shared/theme/theme.dart';
+import 'package:buzz/shared/widgets/skeleton.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  Widget buildShimmerTestable({
+    bool disableAnimations = false,
+    bool enabled = true,
+  }) {
+    return MaterialApp(
+      theme: AppTheme.light(),
+      builder: (context, child) => MediaQuery(
+        data: MediaQuery.of(
+          context,
+        ).copyWith(disableAnimations: disableAnimations),
+        child: child!,
+      ),
+      home: Scaffold(
+        body: SkeletonShimmer(
+          enabled: enabled,
+          child: const SkeletonBar(width: 120, height: 16),
+        ),
+      ),
+    );
+  }
+
+  Widget buildRevealTestable({
+    required ValueNotifier<bool> loading,
+    bool disableAnimations = false,
+  }) {
+    return MaterialApp(
+      theme: AppTheme.light(),
+      builder: (context, child) => MediaQuery(
+        data: MediaQuery.of(
+          context,
+        ).copyWith(disableAnimations: disableAnimations),
+        child: child!,
+      ),
+      home: Scaffold(
+        body: ValueListenableBuilder(
+          valueListenable: loading,
+          builder: (context, isLoading, _) => SkeletonReveal(
+            loading: isLoading,
+            skeleton: const SkeletonBar(width: 120, height: 16),
+            content: const Text('Loaded content'),
+          ),
+        ),
+      ),
+    );
+  }
+
+  double layerOpacity(WidgetTester tester, String key) =>
+      tester.widget<Opacity>(find.byKey(Key(key))).opacity;
+
+  bool contentFocusExcluded(WidgetTester tester) => tester
+      .widget<ExcludeFocus>(
+        find.descendant(
+          of: find.byKey(const Key('skeleton-reveal-content')),
+          matching: find.byType(ExcludeFocus),
+        ),
+      )
+      .excluding;
+
+  testWidgets('sweeps a highlight across skeleton elements while loading', (
+    tester,
+  ) async {
+    await tester.pumpWidget(buildShimmerTestable());
+
+    final shimmer = find.byType(SkeletonShimmer);
+    expect(find.byType(SkeletonBar), findsOneWidget);
+    expect(
+      find.descendant(of: shimmer, matching: find.byType(ShaderMask)),
+      findsOneWidget,
+    );
+
+    final boundary = tester.renderObject<RenderRepaintBoundary>(
+      find
+          .descendant(of: shimmer, matching: find.byType(RepaintBoundary))
+          .first,
+    );
+    final beforeBytes = await tester.runAsync(() async {
+      final image = await boundary.toImage();
+      return image.toByteData();
+    });
+
+    await tester.pump(const Duration(milliseconds: 1000));
+    final afterBytes = await tester.runAsync(() async {
+      final image = await boundary.toImage();
+      return image.toByteData();
+    });
+
+    expect(
+      beforeBytes!.buffer.asUint8List(),
+      isNot(equals(afterBytes!.buffer.asUint8List())),
+    );
+  });
+
+  testWidgets('keeps skeleton elements static for reduced motion', (
+    tester,
+  ) async {
+    await tester.pumpWidget(buildShimmerTestable(disableAnimations: true));
+
+    final shimmer = find.byType(SkeletonShimmer);
+    expect(find.byType(SkeletonBar), findsOneWidget);
+    expect(
+      find.descendant(of: shimmer, matching: find.byType(ShaderMask)),
+      findsNothing,
+    );
+  });
+
+  testWidgets('keeps skeleton elements static when shimmer is disabled', (
+    tester,
+  ) async {
+    await tester.pumpWidget(buildShimmerTestable(enabled: false));
+
+    final shimmer = find.byType(SkeletonShimmer);
+    expect(find.byType(SkeletonBar), findsOneWidget);
+    expect(
+      find.descendant(of: shimmer, matching: find.byType(ShaderMask)),
+      findsNothing,
+    );
+  });
+
+  testWidgets('reveals content in the same slot with a 400ms cross-fade', (
+    tester,
+  ) async {
+    final loading = ValueNotifier(true);
+    await tester.pumpWidget(buildRevealTestable(loading: loading));
+
+    expect(layerOpacity(tester, 'skeleton-reveal-placeholder'), 1);
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), 0);
+    expect(contentFocusExcluded(tester), isTrue);
+
+    loading.value = false;
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 200));
+
+    expect(
+      layerOpacity(tester, 'skeleton-reveal-placeholder'),
+      closeTo(0.5, 0.01),
+    );
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), closeTo(0.5, 0.01));
+    expect(contentFocusExcluded(tester), isTrue);
+
+    await tester.pump(const Duration(milliseconds: 200));
+
+    expect(layerOpacity(tester, 'skeleton-reveal-placeholder'), 0);
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), 1);
+    expect(contentFocusExcluded(tester), isFalse);
+    expect(find.text('Loaded content'), findsOneWidget);
+  });
+
+  testWidgets('resets to the skeleton without animating backwards', (
+    tester,
+  ) async {
+    final loading = ValueNotifier(false);
+    await tester.pumpWidget(buildRevealTestable(loading: loading));
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), 1);
+
+    loading.value = true;
+    await tester.pump();
+
+    expect(layerOpacity(tester, 'skeleton-reveal-placeholder'), 1);
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), 0);
+  });
+
+  testWidgets('reveals immediately for reduced motion', (tester) async {
+    final loading = ValueNotifier(true);
+    await tester.pumpWidget(
+      buildRevealTestable(loading: loading, disableAnimations: true),
+    );
+    final reveal = find.byType(SkeletonReveal);
+    expect(
+      find.descendant(of: reveal, matching: find.byType(ShaderMask)),
+      findsNothing,
+    );
+
+    loading.value = false;
+    await tester.pump();
+
+    expect(layerOpacity(tester, 'skeleton-reveal-placeholder'), 0);
+    expect(layerOpacity(tester, 'skeleton-reveal-content'), 1);
+  });
+}