def METHOD_NAME(self):
    for key in EasyMP4.Get:
        if key in ["tracknumber", "discnumber", "date", "bpm"]:
            continue
        # Test creation
        self.mp4[key] = "a test value"
        self.mp4.save(self.filename)
        mp4 = EasyMP4(self.filename)
        self.failUnlessEqual(mp4[key], ["a test value"])
        self.failUnlessEqual(mp4.keys(), [key])
        # And non-creation setting.
        self.mp4[key] = "a test value"
        self.mp4.save(self.filename)
        mp4 = EasyMP4(self.filename)
        self.failUnlessEqual(mp4[key], ["a test value"])
        self.failUnlessEqual(mp4.keys(), [key])
        del self.mp4[key]