diff -r 000000000000 -r 6474c204b198 dom/plugins/test/mochitest/hang_test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/plugins/test/mochitest/hang_test.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,115 @@
+
+Components.utils.import("resource://gre/modules/KeyValueParser.jsm");
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+var success = false;
+var observerFired = false;
+
+var testObserver = {
+  idleHang: true,
+
+  observe: function(subject, topic, data) {
+    observerFired = true;
+    ok(true, "Observer fired");
+    is(topic, "plugin-crashed", "Checking correct topic");
+    is(data,  null, "Checking null data");
+    ok((subject instanceof Ci.nsIPropertyBag2), "got Propbag");
+    ok((subject instanceof Ci.nsIWritablePropertyBag2), "got writable Propbag");
+
+    var pluginId = subject.getPropertyAsAString("pluginDumpID");
+    isnot(pluginId, "", "got a non-empty plugin crash id");
+
+    // check plugin dump and extra files
+    let directoryService =
+      Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties);
+    let profD = directoryService.get("ProfD", Ci.nsIFile);
+    profD.append("minidumps");
+    let pluginDumpFile = profD.clone();
+    pluginDumpFile.append(pluginId + ".dmp");
+    ok(pluginDumpFile.exists(), "plugin minidump exists");
+
+    let pluginExtraFile = profD.clone();
+    pluginExtraFile.append(pluginId + ".extra");
+    ok(pluginExtraFile.exists(), "plugin extra file exists");
+
+    let extraData = parseKeyValuePairsFromFile(pluginExtraFile);
+
+    // check additional dumps
+
+    ok("additional_minidumps" in extraData, "got field for additional minidumps");
+    let additionalDumps = extraData.additional_minidumps.split(',');
+    ok(additionalDumps.indexOf('browser') >= 0, "browser in additional_minidumps");
+
+    let additionalDumpFiles = [];
+    for (let name of additionalDumps) {
+      let file = profD.clone();
+      file.append(pluginId + "-" + name + ".dmp");
+      ok(file.exists(), "additional dump '"+name+"' exists");
+      if (file.exists()) {
+        additionalDumpFiles.push(file);
+      }
+    }
+
+    // check cpu usage field
+
+    ok("PluginCpuUsage" in extraData, "got extra field for plugin cpu usage");
+    let cpuUsage = parseFloat(extraData["PluginCpuUsage"]);
+    if (this.idleHang) {
+      ok(cpuUsage == 0, "plugin cpu usage is 0%");
+    } else {
+      ok(cpuUsage > 0, "plugin cpu usage is >0%");
+    }
+
+    // check processor count field
+    ok("NumberOfProcessors" in extraData, "got extra field for processor count");
+    ok(parseInt(extraData["NumberOfProcessors"]) > 0, "number of processors is >0");
+
+    // cleanup, to be nice
+    pluginDumpFile.remove(false);
+    pluginExtraFile.remove(false);
+    for (let file of additionalDumpFiles) {
+      file.remove(false);
+    }
+  },
+
+  QueryInterface: function(iid) {
+    if (iid.equals(Ci.nsIObserver) ||
+        iid.equals(Ci.nsISupportsWeakReference) ||
+        iid.equals(Ci.nsISupports))
+      return this;
+    throw Components.results.NS_NOINTERFACE;
+  }
+};
+
+
+function onPluginCrashed(aEvent) {
+  ok(true, "Plugin crashed notification received");
+  ok(observerFired, "Observer should have fired first");
+  is(aEvent.type, "PluginCrashed", "event is correct type");
+
+  var pluginElement = document.getElementById("plugin1");
+  is (pluginElement, aEvent.target, "Plugin crashed event target is plugin element");
+
+  ok(aEvent instanceof Ci.nsIDOMCustomEvent,
+     "plugin crashed event has the right interface");
+
+  var propBag = aEvent.detail.QueryInterface(Ci.nsIPropertyBag2);
+  var pluginDumpID = propBag.getPropertyAsAString("pluginDumpID");
+  isnot(pluginDumpID, "", "got a non-empty dump ID");
+  var pluginName = propBag.getPropertyAsAString("pluginName");
+  is(pluginName, "Test Plug-in", "got correct plugin name");
+  var pluginFilename = propBag.getPropertyAsAString("pluginFilename");
+  isnot(pluginFilename, "", "got a non-empty filename");
+  var didReport = propBag.getPropertyAsBool("submittedCrashReport");
+  // The app itself may or may not have decided to submit the report, so
+  // allow either true or false here.
+  ok((didReport == true || didReport == false), "event said crash report was submitted");
+
+  var os = Cc["@mozilla.org/observer-service;1"].
+           getService(Ci.nsIObserverService);
+  os.removeObserver(testObserver, "plugin-crashed");
+
+  SimpleTest.finish();
+}