Cross frame access tests

client/tests/client/dom/InnerFrameTest.dart

+#library('InnerFrameTest');
+#import('../../../testing/unittest/unittest.dart');
+#import('dart:dom');
+
+main() {
+  if (window != window.top) {

[antonm, 2012/02/24 09:28:54]

nit: I think it should be !==

+    // Child frame.
+
+    // The child's frame should not be able to access its parent's
+    // document.
+    var parentDocument = window.frameElement.ownerDocument;
+    var div = parentDocument.createElement("div");
+    div.id = "illegal";
+    parentDocument.body.appendChild(div);
+    return;
+  }
+
+  // Parent / test frame
+  forLayoutTests();
+
+  final iframe = document.createElement('iframe');
+  iframe.src = window.location.href;
+
+  asyncTest('prepare', 1, () {
+      iframe.addEventListener('load', (e) => callbackDone(), false);

[sra1, 2012/02/24 03:38:30]

Will the script have completed by this time, or does it also run onload,
possibly after this?

+      document.body.appendChild(iframe);
+    });
+
+  test('frameElement', () {
+      var div = document.getElementById('illegal');
+
+      // Ensure that this parent frame was not modified by its child.
+      Expect.isNull(div);
+    });
+}