fix: test runner showing stray buttons due to hot corners

Author: abose

src/LiveDevelopment/BrowserScripts/RemoteFunctions.js

@@ -29,7 +29,8 @@
  * exported functions.
  */
 function RemoteFunctions(config = {}) {
-
+    // we load this file in unit test window and dont want it to do anything unexpected in the unit test runner context
+    const isUnitTestWindow = window.Phoenix && window.Phoenix.isTestWindow;
     const GLOBALS = {
         // given to internal elements like info box, options box, image gallery and all other phcode internal elements
         // to distinguish between phoenix internal vs user created elements
@@ -5626,15 +5627,15 @@ function RemoteFunctions(config = {}) {
     // init the hot corner after the DOM is ready
     if (document.readyState === 'loading') {
         document.addEventListener('DOMContentLoaded', () => {
-            if (!_hotCorner) {
+            if (!_hotCorner && !isUnitTestWindow) {
                 _hotCorner = new HotCorner();
                 _hotCorner.updateState(config.mode === 'preview');
             }
         });
     } else {
         // or if the DOM is already ready then init directly
         setTimeout(() => {
-            if (!_hotCorner) {
+            if (!_hotCorner && !isUnitTestWindow) {
                 _hotCorner = new HotCorner();
                 _hotCorner.updateState(config.mode === 'preview');
             }