def test_0_default(self):
self.assertTrue(len(resolve_writer(".png")) > 0, "has png writer")
self.assertTrue(len(resolve_writer(".nrrd")) > 0, "has nrrd writer")
self.assertTrue(len(resolve_writer("unknown")) > 0, "has writer")
register_writer("unknown1", lambda:
(_ for _ in ()).throw(OptionalImportError))
with self.assertRaises(OptionalImportError):
resolve_writer("unknown1")
def test_1_new(self):
register_writer("new", lambda x: x + 1)
register_writer("new2", lambda x: x + 1)
self.assertEqual(resolve_writer("new")[0](0), 1)