LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
context.reset();
// initialise the fixtures
// XXX we need to call isValid to call checktype(), which is needed to initialise the format
image = new RealFile(new File("test.jpg"));
image.isValid();
audio = new RealFile(new File("test.mp3"));
audio.isValid();
video = new RealFile(new File("test.mpg"));
video.isValid();
webImage = new WebStream("", "http://example.com/test.jpg", "", Format.IMAGE);
webImage.isValid();
webAudio = new WebStream("", "http://example.com/test.mp3", "", Format.AUDIO);
webAudio.isValid();