topic list: Update tests for channelTopicLabelSpan behavior.

Author: manthansubhash01

test/widgets/action_sheet_test.dart

@@ -199,7 +199,7 @@ void main() {
       await tester.pump();
       check(find.byType(InboxPageBody)).findsOne();
 
-      await tester.longPress(find.text(someChannel.name).hitTestable());
+      await tester.longPress(find.textContaining(someChannel.name, findRichText: true).hitTestable());
       await tester.pump(const Duration(milliseconds: 250));
     }
 
@@ -211,7 +211,7 @@ void main() {
       await tester.pump();
       check(find.byType(SubscriptionListPageBody)).findsOne();
 
-      await tester.longPress(find.text(someChannel.name).hitTestable());
+      await tester.longPress(find.textContaining(someChannel.name, findRichText: true).hitTestable());
       await tester.pump(const Duration(milliseconds: 250));
     }
 
@@ -236,7 +236,7 @@ void main() {
 
       await tester.longPress(find.descendant(
         of: find.byType(ZulipAppBar),
-        matching: find.text(channel.name)));
+        matching: find.textContaining(channel.name, findRichText: true)));
       await tester.pump(const Duration(milliseconds: 250));
     }
 
@@ -253,7 +253,7 @@ void main() {
 
       await tester.longPress(find.descendant(
         of: find.byType(RecipientHeader),
-        matching: find.text(message.displayRecipient ?? '')));
+        matching: find.textContaining(message.displayRecipient ?? '', findRichText: true)));
       await tester.pump(const Duration(milliseconds: 250));
     }
 

test/widgets/topic_list_test.dart

@@ -88,8 +88,10 @@ void main() {
       await tester.pump();
       await tester.pump(Duration.zero);
       check(find.descendant(
-        of: find.byType(MessageListPage),
-        matching: find.text('channel foo')),
+        of: find.descendant(
+          of: find.byType(MessageListPage),
+          matching: find.byType(ZulipAppBar)),
+        matching: find.textContaining('channel foo', findRichText: true)),
       ).findsOne();
     });