fix test

Author: nightwing

src/ace_test.js

@@ -89,7 +89,9 @@ module.exports = {
     "test: useStrictCSP": function() {
         ace.config.set("useStrictCSP", undefined);
         function getStyleNode() {
-            return document.getElementById("test.css");
+            return document.adoptedStyleSheets ?
+                document.adoptedStyleSheets.find(sheet => sheet.$id === "test.css") :
+                document.getElementById("test.css");
         }
         assert.ok(!getStyleNode());
         dom.importCssString("test{}", "test.css", false);
@@ -170,6 +172,26 @@ module.exports = {
         var editor = ace.edit(el);
         assert.equal(editor.container, el);
         editor.destroy();
+    },
+    "test: use adoptedStyleSheets": function() {
+        dom.$resetCssModeForTests();
+        var div = document.createElement("div");
+        div.adoptedStyleSheets = [];
+        div.getRootNode = function() {
+            return div;
+        };
+        if (!window.CSSStyleSheet) {
+            window.CSSStyleSheet = function() {
+                this.cssRules = [];
+                this.replaceSync = function() {};
+            };
+        }
+
+        var editor = ace.edit(div);
+        console.log(div.adoptedStyleSheets);
+
+        editor.destroy();
+        dom.$resetCssModeForTests();
     }
 };
 

src/lib/dom.js

@@ -276,6 +276,7 @@ function importCssString(cssText, id, target) {
             var stylesheet = styles[id];
             if (!stylesheet) {
                 stylesheet = styles[id] = new CSSStyleSheet();
+                stylesheet.$id = id;
                 stylesheet.replaceSync(cssText);
             }
             container.adoptedStyleSheets.push(stylesheet);
@@ -305,6 +306,13 @@ var styles = Object.create(null);
 
 exports.importCssString = importCssString;
 
+exports.$resetCssModeForTests = function(useStyleTag) {
+    USE_STYLE_TAG = useStyleTag == undefined ? null : useStyleTag;
+    styles = Object.create(null);
+    strictCSP = undefined;
+    cssCache = [];
+};
+
 /**
  * @param {string} uri
  * @param {Document} [doc]