Add tests for category hashtag.

test/javascripts/acceptance/category-hashtag-test.js.es6

@@ -0,0 +1,34 @@
+import { acceptance } from "helpers/qunit-helpers";
+
+acceptance("Category hashtag", {
+  loggedIn: true,
+  setup() {
+    const response = (object) => {
+      return [
+        200,
+        {"Content-Type": "application/json"},
+        object
+      ];
+    };
+
+    server.get('/category_hashtags/check', () => { //eslint-disable-line
+      return response({ valid: [{ slug: "bug", url: '/c/bugs' }] });
+    });
+  }
+});
+
+test("category hashtag is cooked properly", () => {
+  visit("/t/internationalization-localization/280");
+  click('#topic-footer-buttons .btn.create');
+
+  fillIn('.d-editor-input', "this is a category hashtag #bug");
+  andThen(() => {
+    // TODO: Test that the autocomplete shows
+    equal(find('.d-editor-preview:visible').html().trim(), "<p>this is a category hashtag <a href=\"/c/bugs\" class=\"hashtag\">#<span>bug</span></a></p>");
+  });
+
+  click('#reply-control .btn.create');
+  andThen(() => {
+    equal(find('.topic-post:last .cooked p').html().trim(), "this is a category hashtag <a href=\"/c/bugs\" class=\"hashtag\">#<span>bug</span></a>");
+  });
+});