[MIRROR] Unit Test rework & Master/Ticker update (#11372)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
Co-authored-by: C.L. <killer65311@gmail.com>

code/modules/unit_tests/decl_tests.dm

@@ -0,0 +1,19 @@
+/// converted unit test, maybe should be fully refactored
+
+/datum/unit_test/emotes_shall_have_unique_keys/Run()
+	var/list/keys = list()
+	var/list/duplicates = list()
+
+	var/list/all_emotes = decls_repository.get_decls_of_subtype(/decl/emote)
+	for(var/etype in all_emotes)
+		var/decl/emote/emote = all_emotes[etype]
+		if(!emote.key)
+			continue
+		if(emote.key in keys)
+			if(!duplicates[emote.key])
+				duplicates[emote.key] = list()
+			duplicates[emote.key] += etype
+		else
+			keys += emote.key
+
+	TEST_ASSERT(!length(duplicates), "[length(duplicates)] emote\s had overlapping keys: [english_list(duplicates)].")