Fix tests to account for concurrency :)

test/test_discordbot.ts

@@ -104,9 +104,10 @@ describe("DiscordBot", () => {
       let checkMsgSent = false;
       discordBot.SendMatrixMessage = (...args) => checkMsgSent = true;
 
-      discordBot.OnMessageUpdate(oldMsg, newMsg);
+      discordBot.OnMessageUpdate(oldMsg, newMsg).then(() => {
         Chai.assert.equal(checkMsgSent, false);
       });
+    });
 
     it("should send a matrix message on an edited discord message", () => {
       discordBot = new modDiscordBot.DiscordBot(
@@ -130,10 +131,11 @@ describe("DiscordBot", () => {
       let checkMsgSent = false;
       discordBot.SendMatrixMessage = (...args) => checkMsgSent = true;
 
-      discordBot.OnMessageUpdate(oldMsg, newMsg);
+      discordBot.OnMessageUpdate(oldMsg, newMsg).then(() => {
         Chai.assert.equal(checkMsgSent, true);
       });
     });
+  });
 
   // describe("ProcessMatrixMsgEvent()", () => {
   //