test [nfc]: Add streams and eg.selfUser to store in several tests

Adding of these is necessary in the next commit(s), otherwise these
tests will fail.

test/widgets/action_sheet_test.dart

@@ -43,7 +43,7 @@ Future<void> setupToMessageActionSheet(WidgetTester tester, {
 
   await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
   final store = await testBinding.globalStore.perAccount(eg.selfAccount.id);
-  await store.addUser(eg.user(userId: message.senderId));
+  await store.addUsers([eg.selfUser, eg.user(userId: message.senderId)]);
   if (message is StreamMessage) {
     final stream = eg.stream(streamId: message.streamId);
     await store.addStream(stream);

test/widgets/autocomplete_test.dart

@@ -76,10 +76,12 @@ Future<Finder> setupToTopicInput(WidgetTester tester, {
   addTearDown(testBinding.reset);
   await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
   final store = await testBinding.globalStore.perAccount(eg.selfAccount.id);
+  await store.addUser(eg.selfUser);
   final connection = store.connection as FakeApiConnection;
 
   // prepare message list data
   final stream = eg.stream();
+  await store.addStream(stream);
   final message = eg.streamMessage(stream: stream, sender: eg.selfUser);
   connection.prepare(json: GetMessagesResult(
     anchor: message.id,

test/widgets/compose_box_test.dart

@@ -37,6 +37,11 @@ void main() {
     List<User> users = const [],
     List<ZulipStream> streams = const [],
   }) async {
+    if (narrow is ChannelNarrow || narrow is TopicNarrow) {
+      final channelId = narrow is ChannelNarrow ? narrow.streamId : (narrow as TopicNarrow).streamId;
+      assert(streams.any((stream) => stream.streamId == channelId),
+        'Add a channel with "streamId" the same as of $narrow.streamId to the store.');
+    }
     addTearDown(testBinding.reset);
     final account = eg.account(user: selfUser ?? eg.selfUser);
     await testBinding.globalStore.add(account, eg.initialSnapshot(
@@ -188,15 +193,17 @@ void main() {
     }
 
     testWidgets('_StreamComposeBox', (tester) async {
+      final channel = eg.stream();
       final key = await prepareComposeBox(tester,
-        narrow: ChannelNarrow(eg.stream().streamId));
+        narrow: ChannelNarrow(channel.streamId), streams: [channel]);
       checkComposeBoxTextFields(tester, controllerKey: key,
         expectTopicTextField: true);
     });
 
     testWidgets('_FixedDestinationComposeBox', (tester) async {
+      final channel = eg.stream();
       final key = await prepareComposeBox(tester,
-        narrow: TopicNarrow.ofMessage(eg.streamMessage()));
+        narrow: TopicNarrow(channel.streamId, 'topic'), streams: [channel]);
       checkComposeBoxTextFields(tester, controllerKey: key,
         expectTopicTextField: false);
     });
@@ -207,7 +214,8 @@ void main() {
       required void Function(int messageId) prepareResponse,
     }) async {
       final zulipLocalizations = GlobalLocalizations.zulipLocalizations;
-      await prepareComposeBox(tester, narrow: const TopicNarrow(123, 'some topic'));
+      await prepareComposeBox(tester, narrow: const TopicNarrow(123, 'some topic'),
+        streams: [eg.stream(streamId: 123)]);
 
       final contentInputFinder = find.byWidgetPredicate(
         (widget) => widget is TextField && widget.controller is ComposeContentController);
@@ -271,7 +279,9 @@ void main() {
 
     group('attach from media library', () {
       testWidgets('success', (tester) async {
-        final controllerKey = await prepareComposeBox(tester, narrow: ChannelNarrow(eg.stream().streamId));
+        final channel = eg.stream();
+        final controllerKey = await prepareComposeBox(tester,
+          narrow: ChannelNarrow(channel.streamId), streams: [channel]);
         final composeBoxController = controllerKey.currentState!;
 
         // (When we check that the send button looks disabled, it should be because
@@ -326,8 +336,10 @@ void main() {
     });
 
     group('attach from camera', () {
-      testWidgets('success', (tester) async {
-        final controllerKey = await prepareComposeBox(tester, narrow: ChannelNarrow(eg.stream().streamId));
+      testWidgets('succMessageListPageState.narrowess', (tester) async {
+        final channel = eg.stream();
+        final controllerKey = await prepareComposeBox(tester,
+          narrow: ChannelNarrow(channel.streamId), streams: [channel]);
         final composeBoxController = controllerKey.currentState!;
 
         // (When we check that the send button looks disabled, it should be because

test/widgets/message_list_test.dart

@@ -100,15 +100,17 @@ void main() {
     testWidgets('MessageListPageState.narrow', (tester) async {
       final stream = eg.stream();
       await setupMessageListPage(tester, narrow: ChannelNarrow(stream.streamId),
-        messages: [eg.streamMessage(stream: stream, content: "<p>a message</p>")]);
+        messages: [eg.streamMessage(stream: stream, content: "<p>a message</p>")],
+        streams: [stream]);
       final state = MessageListPage.ancestorOf(tester.element(find.text("a message")));
       check(state.narrow).equals(ChannelNarrow(stream.streamId));
     });
 
     testWidgets('composeBoxController finds compose box', (tester) async {
       final stream = eg.stream();
       await setupMessageListPage(tester, narrow: ChannelNarrow(stream.streamId),
-        messages: [eg.streamMessage(stream: stream, content: "<p>a message</p>")]);
+        messages: [eg.streamMessage(stream: stream, content: "<p>a message</p>")],
+        streams: [stream]);
       final state = MessageListPage.ancestorOf(tester.element(find.text("a message")));
       check(state.composeBoxController).isNotNull();
     });