specPrefs.put("specKey2", "specDefault2");
Map<String, String> inPrefs = Maps.newHashMap();
inPrefs.put("specKey1", "inVal1");
inPrefs.put("otherKey1", "inVal2");
Gadget gadget = mockGadget(false, specPrefs, inPrefs);
TestDefaultIframeUriManager manager = makeManager(false, false);
Uri result = manager.makeRenderingUri(gadget);
assertNotNull(result);
UriBuilder uri = new UriBuilder(result);