Adding a test case for WA.ui.triggerMessage

maps/tests/TriggerMessageApi/script.js

@@ -0,0 +1,13 @@
+WA.onInit().then(() => {
+    let message;
+
+    WA.room.onEnterZone("carpet", () => {
+        message = WA.ui.triggerMessage("This is a test message. Press space to display a chat message. Walk out to hide the message.", () => {
+            WA.chat.sendChatMessage("Hello world!", "The bot");
+        });
+    });
+
+    WA.room.onLeaveZone("carpet", () => {
+        message && message.remove();
+    });
+});