1 files changed, 80 insertions, 0 deletions
diff --git a/js/xpconnect/tests/chrome/test_paris_weakmap_keys.xul b/js/xpconnect/tests/chrome/test_paris_weakmap_keys.xul
new file mode 100644
index 000000000..ac7ff041d
--- /dev/null
+++ b/js/xpconnect/tests/chrome/test_paris_weakmap_keys.xul
@@ -0,0 +1,80 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=777385
+-->
+<window title="Mozilla Bug 777385"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <div></div>
+  <div id="mydivname"></div>
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id="
+     target="_blank">Mozilla Bug 777385</a>
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript">
+  <![CDATA[
+  /** Test for Bug 777385 **/
+
+  let Cu = Components.utils;
+
+  let live_map = new WeakMap;
+
+  let get_div_style = function () {
+    return document.getElementById("mydivname").style;
+  }
+
+  let make_live_map = function () {
+    let my_div_style = get_div_style();
+    let div_fail = false;
+    try {
+      live_map.set(my_div_style, 12345);
+    } catch (e) {
+      div_fail = true;
+    }
+    ok(!div_fail, "Using elem.style as a weak map key should not produce an exception.");
+
+    is(live_map.get(get_div_style()), 12345, "Live map should have live style with right value before GC.");
+
+  }
+
+  make_live_map();
+
+  // RGBColor is a non-nsISupports refCounted class using WebIDL bindings.
+
+  // non-nsISupports cycle-collected classes should fail as weak map keys.
+  let context = window.getComputedStyle(document.documentElement, null).getPropertyCSSValue("color").getRGBColorValue();
+  let contextFail = false;
+  try {
+    live_map.set(context, 2);
+  } catch (e) {
+    contextFail = true;
+  }
+
+  ok(contextFail, "Cycle collected non-nsISupports classes aren't allowed as weak map keys.");
+
+  /* Set up for running precise GC/CC then check the results. */
+
+  SimpleTest.waitForExplicitFinish();
+
+  Cu.schedulePreciseGC(function () {
+    SpecialPowers.DOMWindowUtils.cycleCollect();
+    SpecialPowers.DOMWindowUtils.garbageCollect();
+    SpecialPowers.DOMWindowUtils.garbageCollect();
+
+    is(ThreadSafeChromeUtils.nondeterministicGetWeakMapKeys(live_map).length, 1,
+       "Live nsISupports new DOM bindings wrappercached native weak map key should not be removed.");
+
+    is(live_map.get(get_div_style()), 12345, "Live map should have live style with right value after GC.");
+
+    SimpleTest.finish();
+  });
+
+  ]]>
+  </script>
+</window>