FIX: Error in Ember CLI environment

There are a few fixes at play here:

1) We were still not initializing objects to the correct types.

2) If a debounce timed out, it was returning a string instead of an
array which was not appropriately handled.

3) In testing mode we never cancel the search promise for stability.

app/assets/javascripts/discourse/app/lib/category-tag-search.js

@@ -20,12 +20,11 @@ function updateCache(term, results) {
 
 function searchTags(term, categories, limit) {
   return new Promise((resolve) => {
-    const clearPromise = later(
-      () => {
+    let clearPromise = isTesting()
+      ? null
+      : later(() => {
           resolve(CANCELLED_STATUS);
-      },
-      isTesting() ? 50 : 5000
-    );
+        }, 5000);
 
     const debouncedSearch = (q, cats, resultFunc) => {
       discourseDebounce(

app/assets/javascripts/discourse/app/widgets/search-menu.js

@@ -9,6 +9,7 @@ import { popupAjaxError } from "discourse/lib/ajax-error";
 import { Promise } from "rsvp";
 import { search as searchCategoryTag } from "discourse/lib/category-tag-search";
 import userSearch from "discourse/lib/user-search";
+import { CANCELLED_STATUS } from "discourse/lib/autocomplete";
 
 const CATEGORY_SLUG_REGEXP = /(\#[a-zA-Z0-9\-:]*)$/gi;
 const USERNAME_REGEXP = /(\@[a-zA-Z0-9\-\_]*)$/gi;
@@ -18,7 +19,7 @@ const searchData = {};
 
 export function initSearchData() {
   searchData.loading = false;
-  searchData.results = [];
+  searchData.results = {};
   searchData.noResults = false;
   searchData.term = undefined;
   searchData.typeFilter = null;
@@ -52,8 +53,9 @@ const SearchHelper = {
 
     if (matchSuggestions) {
       searchData.noResults = true;
-      searchData.results = [];
+      searchData.results = {};
       searchData.loading = false;
+      searchData.suggestionResults = [];
 
       if (matchSuggestions.type === "category") {
         const categorySearchTerm = matchSuggestions.categoriesMatch[0].replace(
@@ -66,8 +68,10 @@ const SearchHelper = {
           widget.siteSettings
         );
         Promise.resolve(categoryTagSearch).then((results) => {
+          if (results !== CANCELLED_STATUS) {
             searchData.suggestionResults = results;
             searchData.suggestionKeyword = "#";
+          }
           widget.scheduleRerender();
         });
       } else if (matchSuggestions.type === "username") {