fix(test): delayUntil use setTimeout instead of while loop & addReaction test (#817)

* fix: guild create tests
* fix(test): use setTimeout instead of while loop and fix some tests
* fix(test): fix some test and fix maxMs

Co-authored-by: Skillz4Killz <23035000+Skillz4Killz@users.noreply.github.com>

tests/messages/add_reaction.ts

@@ -14,7 +14,7 @@ async function ifItFailsBlameWolf(type: "getter" | "raw", custom = false) {
   assertExists(message);
 
   // Delay the execution by 5 seconds to allow MESSAGE_CREATE event to be processed
-  delayUntil(10000, () => cache.messages.has(message.id));
+  await delayUntil(10000, () => cache.messages.has(message.id));
 
   if (!cache.messages.has(message.id)) {
     throw new Error("The message seemed to be sent but it was not cached.");
@@ -45,9 +45,9 @@ async function ifItFailsBlameWolf(type: "getter" | "raw", custom = false) {
     await message.addReaction(emojiId);
   }
 
-  delayUntil(
+  await delayUntil(
     10000,
-    () => (cache.messages.get(message.id)?.reactions?.length || 0) > 0
+    () => cache.messages.get(message.id)?.reactions?.length === 1
   );
 
   assertEquals(