Fix unit test freeze in IE.

CHANGELOG

@@ -1,3 +1,5 @@
+* Fix unit test freeze in IE. (Tobie Langel)
+
 * Ensure Hash does not return keys from the prototype chain (e.g., constructor, valueOf, toString). (kangax)
 
 * Fix toString/valueOf sharing same method reference via closure in Class#addMethods. Use plain property assignment, since Object.extend fails to enumerate over toString/valueOf. (kangax)

test/lib/jstest.rb

@@ -86,9 +86,7 @@ class IEBrowser < Browser
       ie = WIN32OLE.new('InternetExplorer.Application')
       ie.visible = true
       ie.Navigate(url)
-      while ie.ReadyState != 4 do
-        sleep(1)
-      end
+      sleep 0.01 while ie.Busy || ie.ReadyState != 4
     end
   end