def METHOD_NAME(self):
    for fn in self.files:
        (basename, _, ext) = fn.rpartition('.')
        mime_type = TestImage.ext_to_mime.get(ext, None)
        assert mime_type is not None
        url = "file://{}".format(fn)
        assert url
        r = url_get(url)
        assert r
        assert r.content
        img = img_to_data(r.content, mime_type)
        assert img
        print(img)