feat(ui): 更新品牌启动页与选集交互

test/player/episode_picker_cell_test.dart

@@ -0,0 +1,73 @@
+// Author: fruit.com.cn
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/pages/player/widgets/episode_picker_cell.dart';
+
+void main() {
+  testWidgets('should_show_lock_when_episode_needs_unlock', (tester) async {
+    await tester.pumpWidget(
+      _host(
+        const Episode(
+          id: '12',
+          number: 12,
+          title: 'Paid',
+          isFree: false,
+          locked: true,
+        ),
+      ),
+    );
+
+    expect(find.byIcon(Icons.lock_outline), findsOneWidget);
+    expect(find.text('12'), findsOneWidget);
+    final cell = tester.getRect(find.byType(EpisodePickerCell));
+    final cover = tester.getRect(find.byKey(const ValueKey('episode-lock-cover-12')));
+    final number = tester.getRect(find.text('12'));
+    final lock = tester.getRect(find.byIcon(Icons.lock_outline));
+    expect(number.overlaps(lock), isFalse);
+    expect(number.top, greaterThanOrEqualTo(lock.bottom));
+    final wash = tester.widget<ColoredBox>(
+      find.byKey(const ValueKey('episode-lock-cover-12')),
+    );
+    expect(cover.width, greaterThanOrEqualTo(cell.width - 1));
+    expect(cover.height, greaterThanOrEqualTo(cell.height - 1));
+    expect(cover.contains(lock.center), isTrue);
+    expect(wash.color.a, greaterThan(0));
+    expect(wash.color.a, lessThan(1));
+  });
+
+  testWidgets('should_hide_lock_when_episode_is_free', (tester) async {
+    await tester.pumpWidget(
+      _host(
+        const Episode(
+          id: '1',
+          number: 1,
+          title: 'Free',
+          isFree: true,
+        ),
+      ),
+    );
+
+    expect(find.byIcon(Icons.lock_outline), findsNothing);
+    expect(find.byKey(const ValueKey('episode-lock-cover-1')), findsNothing);
+    expect(find.text('1'), findsOneWidget);
+  });
+}
+
+Widget _host(Episode episode) {
+  return MaterialApp(
+    home: Scaffold(
+      body: SizedBox(
+        width: 52,
+        height: 50,
+        child: EpisodePickerCell(
+          episode: episode,
+          selected: false,
+          lockLabel: 'Locked',
+          onTap: () {},
+        ),
+      ),
+    ),
+  );
+}