test [nfc]: Introduce eg.realmEmojiItem

Some bits of data change in the one existing test that was using
these; but not any data that the test looks at.

Author: gnprice

test/example_data.dart

@@ -62,6 +62,25 @@ GetServerSettingsResult serverSettings({
   );
 }
 
+RealmEmojiItem realmEmojiItem({
+  required String emojiCode,
+  required String emojiName,
+  String? sourceUrl,
+  String? stillUrl,
+  bool deactivated = false,
+  int? authorId,
+}) {
+  assert(RegExp(r'^[1-9][0-9]*$').hasMatch(emojiCode));
+  return RealmEmojiItem(
+    id: emojiCode,
+    name: emojiName,
+    sourceUrl: sourceUrl ?? '/emoji/$emojiCode.png',
+    stillUrl: stillUrl,
+    deactivated: deactivated,
+    authorId: authorId ?? user().userId,
+  );
+}
+
 ////////////////////////////////////////////////////////////////
 // Users and accounts.
 //

test/widgets/emoji_reaction_test.dart

@@ -167,10 +167,8 @@ void main() {
             final users = [user1, user2, user3, user4, user5];
 
             final realmEmoji = <String, RealmEmojiItem>{
-              '181': RealmEmojiItem(id: '181', name: 'twocents', authorId: 7,
-                  deactivated: false, sourceUrl: '/foo/2', stillUrl: null),
-              '182': RealmEmojiItem(id: '182', name: 'threecents', authorId: 7,
-                  deactivated: false, sourceUrl: '/foo/3', stillUrl: null),
+              '181': eg.realmEmojiItem(emojiCode: '181', emojiName: 'twocents'),
+              '182': eg.realmEmojiItem(emojiCode: '182', emojiName: 'threecents'),
             };
 
             runSmokeTest('same reaction, different users, with one unknown user', [