Add the ability to get the Javascript console errors in Firefox in the test output when tests fail.

tools/testing/extensions/firefox/ConsoleCollector/chrome/content/console.js

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.

[Emily Fortuna, 2012/10/02 22:40:49]

I'm confused. This is for Chrome? Why is it in the extensions/firefox directory?
 Can you at least place a readme in this directory explaining how it's used (and
better, some comments in this file)

[gram, 2012/10/04 18:43:12]

No, this is "chrome" in the sense of UI; it is just the standard directory
layout for Firefox extensions.

+
+var ConsoleCollector = {};
+  
+(function() {
+  var messages = [];
+  this.add = function(message) {
+    messages.push(message);
+  };
+  this.read = function(type) {
+    var rtn = [];
+    for (var i = 0; i < messages.length; i++) {
+      var message = messages[i];
+      rtn.push({ 'time' : message.timeStamp,
+                 'source' : message.sourceName,
+                 'line': message.lineNumber,
+                 'column': message.columnNumber,
+                 'category': message.category,
+                 'message' : message.errorMessage });
+    }
+    messages = [];
+    return rtn;
+  };
+  this.clear = function() {
+    messages = [];
+  };
+}).apply(ConsoleCollector);
+
+(function() {
+
+  var consoleService;
+
+  var consoleListener = {
+    observe: function(e) {
+      try {
+        var message = e.QueryInterface(Components.interfaces.nsIScriptError);
+        ConsoleCollector.add(message);
+      } catch (exception) {
+        ConsoleCollector.add(e);
+      }      
+    },
+
+    QueryInterface: function (iid) {
+      if (!iid.equals(Components.interfaces.nsIConsoleListener) &&
+      !iid.equals(Components.interfaces.nsISupports)) {
+        throw Components.results.NS_ERROR_NO_INTERFACE;
+      }
+      return this;
+    }
+  };
+  
+  function initialize(event) {
+    consoleService = Components.classes['@mozilla.org/consoleservice;1']
+                                  .getService(Components.interfaces.nsIConsoleService);

[Emily Fortuna, 2012/10/02 22:40:49]

80 char

[gram, 2012/10/04 18:43:12]

Dang - my Sublime Text is putting in tabs it seems!

+    if (consoleService) {
+      consoleService.registerListener(consoleListener); 
+    }                              
+  }
+
+  function shutdown(event) {
+    consoleService.unregisterListener(consoleListener);   
+  }
+  
+  var onPageLoad = function(e) {
+    var win = e.originalTarget.defaultView;
+    if (win) {
+      win.wrappedJSObject.ConsoleCollector = ConsoleCollector;
+    }
+  };
+
+  window.getBrowser().addEventListener("load", onPageLoad, true);
+  window.addEventListener('load', initialize, false);
+  window.addEventListener('unload', shutdown, false);
+}());
+
+
+