diff -r 000000000000 -r 6474c204b198 netwerk/test/TestDiskCache.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/TestDiskCache.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,84 @@
+var DEBUG = false;
+
+var clientID = "javascript";
+var key = "theme:button";
+var nsICache = Components.interfaces.nsICache;
+
+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 session = service.createSession(clientID, storagePolicy, streamable);
+    return session;
+}
+
+function openCacheEntry(mode)
+{
+    var session = createCacheSession(clientID, nsICache.STORE_ON_DISK, true);
+    var entry = session.openCacheEntry(key, mode);
+    return entry;
+}
+
+function wrapInputStream(input)
+{
+    var nsIScriptableInputStream = Components.interfaces.nsIScriptableInputStream;
+    var factory = Components.classes["@mozilla.org/scriptableinputstream;1"];
+    var wrapper = factory.createInstance(nsIScriptableInputStream);
+    wrapper.init(input);
+    return wrapper;
+}
+
+function test()
+{
+    var outputEntry = openCacheEntry(nsICache.ACCESS_WRITE);
+    var output = outputEntry.transport.openOutputStream(0, -1, 0);
+    if (output.write("foo", 3) == 3)
+        print("disk cache write works!");
+    else
+        print("disk cache write broken!");
+
+    // store some metadata.
+    outputEntry.setMetaDataElement("size", "3");
+
+    output.close();
+    outputEntry.markValid();
+    outputEntry.close();
+
+    var inputEntry = openCacheEntry(nsICache.ACCESS_READ);
+    var input = wrapInputStream(inputEntry.transport.openInputStream(0, -1, 0));
+
+    if (input.read(input.available()) == "foo")
+        print("disk cache read works!");
+    else
+        print("disk cache read broken!");
+
+    if (inputEntry.getMetaDataElement("size") == "3")
+        print("disk cache metadata works!");
+    else
+        print("disk cache metadata broken!");
+
+    input.close();
+    inputEntry.close();
+}
+
+function doom()
+{
+    var doomedEntry = openCacheEntry(nsICache.ACCESS_READ_WRITE);
+    doomedEntry.doom();
+    doomedEntry.close();
+}
+
+if (DEBUG) {
+    getCacheService();
+    print("cache service loaded.");
+} else {
+    print("running disk cache test.");
+    test();
+    print("disk cache test complete.");
+}