Make sure window.gl is properly instantiated in tests

spec/frontend/gl_form_spec.js

@@ -9,6 +9,8 @@ describe('GLForm', () => {
 
   describe('when instantiated', () => {
     beforeEach(done => {
+      window.gl = window.gl || {};
+
       testContext.form = $('<form class="gfm-form"><textarea class="js-gfm-input"></form>');
       testContext.textarea = testContext.form.find('textarea');
       jest.spyOn($.prototype, 'off').mockReturnValue(testContext.textarea);

spec/frontend/search_autocomplete_spec.js

@@ -113,6 +113,7 @@ describe('Search autocomplete dropdown', () => {
     window.gon = {};
     window.gon.current_user_id = userId;
     window.gon.current_username = userName;
+    window.gl = window.gl || (window.gl = {});
 
     return (widget = initSearchAutocomplete({ autocompletePath }));
   });