narrow [nfc]: Rename references of ChannelNarrow to match new name

Author: Khader-1

lib/model/unreads.dart

@@ -151,7 +151,7 @@ class Unreads extends ChangeNotifier {
   /// actively unmuted.
   ///
   /// For a count that's appropriate in UI contexts that are focused
-  /// specifically on this stream, see [countInStreamNarrow].
+  /// specifically on this stream, see [countInChannelNarrow].
   // TODO(#370): maintain this count incrementally, rather than recomputing from scratch
   int countInStream(int streamId) {
     final topics = streams[streamId];
@@ -174,7 +174,7 @@ class Unreads extends ChangeNotifier {
   /// For a count that's appropriate in UI contexts that are not already
   /// focused on this stream, see [countInStream].
   // TODO(#370): maintain this count incrementally, rather than recomputing from scratch
-  int countInStreamNarrow(int streamId) {
+  int countInChannelNarrow(int streamId) {
     final topics = streams[streamId];
     if (topics == null) return 0;
     int c = 0;
@@ -198,7 +198,7 @@ class Unreads extends ChangeNotifier {
       case CombinedFeedNarrow():
         return countInCombinedFeedNarrow();
       case ChannelNarrow():
-        return countInStreamNarrow(narrow.streamId);
+        return countInChannelNarrow(narrow.streamId);
       case TopicNarrow():
         return countInTopicNarrow(narrow.streamId, narrow.topic);
       case DmNarrow():

lib/widgets/compose_box.dart

@@ -913,7 +913,7 @@ abstract class ComposeBoxController<T extends StatefulWidget> extends State<T> {
   FocusNode get contentFocusNode;
 }
 
-/// A compose box for use in a stream narrow.
+/// A compose box for use in a channel narrow.
 ///
 /// This offers a text input for the topic to send to,
 /// in addition to a text input for the message content.

lib/widgets/inbox.dart

@@ -441,7 +441,7 @@ class _StreamHeaderItem extends _HeaderItem {
       pageState.collapseStream(subscription.streamId);
     }
   }
-  @override Future<void> onRowTap() => onCollapseButtonTap(); // TODO open stream narrow
+  @override Future<void> onRowTap() => onCollapseButtonTap(); // TODO open channel narrow
 }
 
 class _StreamSection extends StatelessWidget {

test/model/internal_link_test.dart

@@ -279,30 +279,30 @@ void main() {
   });
 
   group('parseInternalLink edge cases', () {
-    void testExpectedStreamNarrow(String testCase, int? streamId) {
-      final streamNarrow = (streamId != null) ? ChannelNarrow(streamId) : null;
-      testExpectedNarrows([(testCase, streamNarrow)], streams: [
+    void testExpectedChannelNarrow(String testCase, int? streamId) {
+      final channelNarrow = (streamId != null) ? ChannelNarrow(streamId) : null;
+      testExpectedNarrows([(testCase, channelNarrow)], streams: [
         eg.stream(streamId: 1, name: "general"),
       ]);
     }
 
     group('basic', () {
-      testExpectedStreamNarrow('#narrow/stream/1-general',         1);
+      testExpectedChannelNarrow('#narrow/stream/1-general',         1);
     });
 
     group('if stream not found, use stream ID anyway', () {
-      testExpectedStreamNarrow('#narrow/stream/123-topic',         123);
+      testExpectedChannelNarrow('#narrow/stream/123-topic',         123);
     });
 
     group('on stream link with wrong name, ID wins', () {
-      testExpectedStreamNarrow('#narrow/stream/1-nonsense',        1);
-      testExpectedStreamNarrow('#narrow/stream/1-',                1);
+      testExpectedChannelNarrow('#narrow/stream/1-nonsense',        1);
+      testExpectedChannelNarrow('#narrow/stream/1-',                1);
     });
 
     group('on malformed stream link: reject', () {
-      testExpectedStreamNarrow('#narrow/stream/-1',                null);
-      testExpectedStreamNarrow('#narrow/stream/1nonsense-general', null);
-      testExpectedStreamNarrow('#narrow/stream/-general',          null);
+      testExpectedChannelNarrow('#narrow/stream/-1',                null);
+      testExpectedChannelNarrow('#narrow/stream/1nonsense-general', null);
+      testExpectedChannelNarrow('#narrow/stream/-general',          null);
     });
   });
 

test/model/unreads_test.dart

@@ -174,7 +174,7 @@ void main() {
       check(model.countInCombinedFeedNarrow()).equals(5);
     });
 
-    test('countInStream/Narrow', () async {
+    test('countInChannel/Narrow', () async {
       final stream = eg.stream();
       prepare();
       await channelStore.addStream(stream);
@@ -189,14 +189,14 @@ void main() {
         eg.streamMessage(stream: stream, topic: 'b', flags: []),
         eg.streamMessage(stream: stream, topic: 'c', flags: []),
       ]);
-      check(model.countInStream      (stream.streamId)).equals(5);
-      check(model.countInStreamNarrow(stream.streamId)).equals(5);
+      check(model.countInStream       (stream.streamId)).equals(5);
+      check(model.countInChannelNarrow(stream.streamId)).equals(5);
 
       await channelStore.handleEvent(SubscriptionUpdateEvent(id: 1,
         streamId: stream.streamId,
         property: SubscriptionProperty.isMuted, value: true));
-      check(model.countInStream      (stream.streamId)).equals(2);
-      check(model.countInStreamNarrow(stream.streamId)).equals(5);
+      check(model.countInStream       (stream.streamId)).equals(2);
+      check(model.countInChannelNarrow(stream.streamId)).equals(5);
     });
 
     test('countInTopicNarrow', () {

test/widgets/action_sheet_test.dart

@@ -288,7 +288,7 @@ void main() {
       check(contentController).not((it) => it.validationErrors.contains(ContentValidationError.quoteAndReplyInProgress));
     }
 
-    testWidgets('in stream narrow', (WidgetTester tester) async {
+    testWidgets('in channel narrow', (WidgetTester tester) async {
       final message = eg.streamMessage();
       await setupToMessageActionSheet(tester, message: message, narrow: ChannelNarrow(message.streamId));
       final store = await testBinding.globalStore.perAccount(eg.selfAccount.id);