use std::convert::TryInto; #[test]fn prefix_with_namespace_and_stripping() {    let ns = git_ref::namespace::expand("foo").unwrap();    let mut name: git_ref::FullName = "refs/heads/main".try_into().unwrap();    assert_eq!(        name.prefix_namespace(&ns).as_bstr(),        "refs/namespaces/foo/refs/heads/main"    );    assert_eq!(        name.prefix_namespace(&ns).as_bstr(),        "refs/namespaces/foo/refs/heads/main",        "idempotent prefixing"    );    assert_eq!(name.strip_namespace(&ns).as_bstr(), "refs/heads/main");    assert_eq!(        name.strip_namespace(&ns).as_bstr(),        "refs/heads/main",        "idempotent stripping"    );}