Bug 1535931 [wpt PR 15812] - Selection and document.open(), a=testonly

Automatic update from web-platform-tests
Selection and document.open()

--

wpt-commits: 0ea8f9e9da1dadf3fd23e20621f880d6acc6c0ac
wpt-pr: 15812

testing/web-platform/tests/selection/Document-open.html

@@ -6,39 +6,23 @@
 <script>
 "use strict";
 
-// This tests the HTML spec requirement "Replace the Document's singleton
-// objects with new instances of those objects. (This includes in particular
-// the Window, Location, History, ApplicationCache, and Navigator, objects, the
-// various BarProp objects, the two Storage objects, the various HTMLCollection
-// objects, and objects defined by other specifications, like Selection and the
-// document's UndoManager. It also includes all the Web IDL prototypes in the
-// JavaScript binding, including the Document object's prototype.)" in the
-// document.open() algorithm.
+const iframe = document.createElement("iframe");
+async_test(t => {
+  iframe.onload = t.step_func_done(() => {
+    const originalSelection = iframe.contentWindow.getSelection();
+    assert_equals(originalSelection.rangeCount, 0, "rangeCount must initially be 0");
+    iframe.contentDocument.body.appendChild(iframe.contentDocument.createTextNode("foo"));
+    const range = iframe.contentDocument.createRange();
+    range.selectNodeContents(iframe.contentDocument.body);
+    iframe.contentWindow.getSelection().addRange(range);
+    assert_equals(originalSelection.rangeCount, 1, "rangeCount must be 1 after adding a range");
 
-var iframe = document.createElement("iframe");
-var t = async_test("Selection must be replaced with a new object after document.open()");
-iframe.onload = function() {
-    t.step(function() {
-        var originalSelection = iframe.contentWindow.getSelection();
-        assert_equals(originalSelection.rangeCount, 0,
-            "Sanity check: rangeCount must be initially 0");
-        iframe.contentDocument.body.appendChild(
-            iframe.contentDocument.createTextNode("foo"));
-        var range = iframe.contentDocument.createRange();
-        range.selectNodeContents(iframe.contentDocument.body);
-        iframe.contentWindow.getSelection().addRange(range);
-        assert_equals(originalSelection.rangeCount, 1,
-            "Sanity check: rangeCount must be 1 after adding a range");
+    iframe.contentDocument.open();
 
-        iframe.contentDocument.open();
-
-        assert_not_equals(iframe.contentWindow.getSelection(), originalSelection,
-            "After document.open(), the Selection object must no longer be the same");
-        assert_equals(iframe.contentWindow.getSelection().rangeCount, 0,
-            "After document.open(), rangeCount must be 0 again");
-    });
-    t.done();
+    assert_equals(iframe.contentWindow.getSelection(), originalSelection, "After document.open(), the Selection object must be the same");
+    assert_equals(iframe.contentWindow.getSelection().rangeCount, 1, "After document.open(), rangeCount must still be 1");
     document.body.removeChild(iframe);
-};
-document.body.appendChild(iframe);
+  });
+  document.body.appendChild(iframe);
+}, "Selection must not be replaced with a new object after document.open()");
 </script>