| self.assertEqual(guess_format("example.trix"), "trix") |
| self.assertEqual(guess_format("local-file.jsonld"), "json-ld") |
| self.assertEqual(guess_format("local-file.json-ld"), "json-ld") |
| self.assertEqual(guess_format("/some/place/on/disk/example.json"), "json-ld") |
| self.assertEqual(guess_format("../../relative/place/on/disk/example.json"), "json-ld") |
| self.assertEqual(guess_format("example.rdf"), "xml") |
| self.assertEqual(guess_format("example.nt"), "nt") |
| self.assertEqual(guess_format("example.n3"), "n3") |
| self.assertIsNone(guess_format("example.docx", None)) |
| self.assertIsNone(guess_format("example", None)) |
| self.assertIsNone(guess_format("example.mkv", None)) |