diff -r 000000000000 -r 6474c204b198 netwerk/test/TestObjectCache.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/TestObjectCache.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+function getCacheService()
+{
+    var nsCacheService = Components.classes["@mozilla.org/network/cache-service;1"];
+    var service = nsCacheService.getService(Components.interfaces.nsICacheService);
+    return service;
+}
+
+function createCacheSession(clientID, storagePolicy, streamable)
+{
+    var service = getCacheService();
+    var nsICache = Components.interfaces.nsICache;
+    var session = service.createSession(clientID, storagePolicy, streamable);
+    return session;
+}
+
+function openCacheEntry(clientID, url)
+{
+    var nsICache = Components.interfaces.nsICache;
+    var session = createCacheSession(clientID, nsICache.STORE_ANYWHERE, false);
+    var entry = session.openCacheEntry(url, nsICache.ACCESS_READ_WRITE);
+    return entry;
+}
+
+function wrapString(str)
+{
+    var nsISupportsCString = Components.interfaces.nsISupportsCString;
+    var factory = Components.classes["@mozilla.org/supports-cstring;1"];
+    var wrapper = factory.createInstance(nsISupportsCString);
+    wrapper.data = str;
+    return wrapper;
+}
+
+function test()
+{
+    var data = wrapString("javascript");
+    var entry = openCacheEntry("javascript", "theme:button");
+    entry.cacheElement = data;
+    entry.markValid();
+    entry.close();
+
+    var newEntry = openCacheEntry("javascript", "theme:button");
+    if (newEntry.cacheElement === data)
+        print("object cache works.");
+    else
+        print("object cache failed.");
+}
+
+test();