def test_from_address():
s = Source.from_address(
SourceAddress("Github", repo="org/repo", subpath="a/folder"))
assert isinstance(s, GithubSource)
assert s.repo == "org/repo"
assert s.subpath == "a/folder"
s = Source.from_address("github://org/repo")
assert isinstance(s, GithubSource)
assert s.repo == "org/repo"
assert s.subpath is None