use bstr::ByteSlice;use gix_path::{to_unix_separators, to_windows_separators}; #[test]fn assure_unix_separators() {    assert_eq!(to_unix_separators(b"no-backslash".as_bstr()).as_bstr(), "no-backslash");     assert_eq!(to_unix_separators(br"\a\b\\".as_bstr()).as_bstr(), "/a/b//");} #[test]fn assure_windows_separators() {    assert_eq!(        to_windows_separators(b"no-backslash".as_bstr()).as_bstr(),        "no-backslash"    );     assert_eq!(to_windows_separators(b"/a/b//".as_bstr()).as_bstr(), r"\a\b\\");} mod normalize; mod normalize_and_clean {    use std::{borrow::Cow, path::Path};     use gix_path::normalize_and_clean;     fn p(input: &str) -> &Path {        Path::new(input)    }     #[test]    fn clean_paths_and_use_the_cwd_for_empty_results() {        let cwd = p("/cwd");        for (input, expected) in [            ("", "/cwd"),            (".", "/cwd"),            ("./a", "a"),            ("a/./b", "a/b"),            ("a//b/", "a/b"),            ("a/..", "/cwd"),        ] {            assert_eq!(                normalize_and_clean(p(input).into(), cwd).expect("path can be normalized"),                p(expected),                "'{input}' cleans to '{expected}'"            );        }        assert_eq!(            normalize_and_clean(p(".").into(), p(""))                .expect("path can be normalized")                .as_ref(),            p(""),            "an empty CWD allows an empty normalized path"        );        assert_eq!(            normalize_and_clean(p(".").into(), cwd)                .expect("path can be normalized")                .as_ref(),            cwd,            "an empty input path is the CWD"        );        assert!(            matches!(normalize_and_clean(p("a/b").into(), cwd), Some(Cow::Borrowed(path)) if path == p("a/b")),            "already-clean borrowed paths stay borrowed"        );    }} mod normalize_saturating {    use std::{borrow::Cow, path::Path};     use gix_path::normalize_saturating;     fn p(input: &str) -> &Path {        Path::new(input)    }     #[test]    fn walking_up_too_much_stays_at_the_root() {        let cwd = "/users/name".as_ref();        assert_eq!(            normalize_saturating(p("./a/b/../../../../../actually-valid").into(), cwd).as_ref(),            p("/actually-valid")        );        assert_eq!(            normalize_saturating(p("/a/b/../../../../actually-valid").into(), cwd).as_ref(),            p("/actually-valid")        );        assert_eq!(            normalize_saturating(p("/a/b/../../../../..").into(), cwd).as_ref(),            p("/")        );    }     #[test]    fn preserves_normal_paths() {        let path = p("a/b");        assert!(matches!(normalize_saturating(path.into(), p("/users")), Cow::Borrowed(actual) if actual == path));        assert_eq!(            normalize_saturating(p("a/../b").into(), p("/users")).as_ref(),            p("b"),            "paths that do not reach the root normalize as usual"        );    }} mod join_bstr_unix_pathsep {    use bstr::BStr;    use gix_path::join_bstr_unix_pathsep;     fn b(s: &str) -> &BStr {        s.into()    }     #[test]    fn typical_with_double_slash_avoidance() {        assert_eq!(join_bstr_unix_pathsep(b("base"), "path"), b("base/path"));        assert_eq!(            join_bstr_unix_pathsep(b("base/"), "path"),            b("base/path"),            "no double slashes"        );        assert_eq!(join_bstr_unix_pathsep(b("/base"), "path"), b("/base/path"));        assert_eq!(join_bstr_unix_pathsep(b("/base/"), "path"), b("/base/path"));    }    #[test]    fn relative_base_or_path_are_nothing_special() {        assert_eq!(join_bstr_unix_pathsep(b("base"), "."), b("base/."));        assert_eq!(join_bstr_unix_pathsep(b("base"), ".."), b("base/.."));        assert_eq!(join_bstr_unix_pathsep(b("base"), "../dir"), b("base/../dir"));    }    #[test]    fn absolute_path_produces_double_slashes() {        assert_eq!(join_bstr_unix_pathsep(b("/base"), "/root"), b("/base//root"));        assert_eq!(join_bstr_unix_pathsep(b("base/"), "/root"), b("base//root"));    }    #[test]    fn empty_path_makes_base_end_with_a_slash() {        assert_eq!(join_bstr_unix_pathsep(b("base"), ""), b("base/"));        assert_eq!(join_bstr_unix_pathsep(b("base/"), ""), b("base/"));    }    #[test]    fn empty_base_leaves_everything_untouched() {        assert_eq!(join_bstr_unix_pathsep(b(""), ""), b(""));        assert_eq!(join_bstr_unix_pathsep(b(""), "hi"), b("hi"));        assert_eq!(join_bstr_unix_pathsep(b(""), "/hi"), b("/hi"));    }} mod relativize_with_prefix {    fn r(path: &str, prefix: &str) -> String {        gix_path::to_unix_separators_on_windows(            gix_path::os_str_into_bstr(gix_path::relativize_with_prefix(path.as_ref(), prefix.as_ref()).as_os_str())                .expect("no illformed UTF-8"),        )        .to_string()    }     #[test]    fn basics() {        assert_eq!(            r("a", "a"),            ".",            "reaching the prefix is signalled by a '.', the current dir"        );        assert_eq!(r("a/b/c", "a/b"), "c", "'c' is clearly within the current directory");        assert_eq!(            r("c/b/c", "a/b"),            "../../c/b/c",            "when there is a complete disjoint prefix, we have to get out of it with ../"        );        assert_eq!(            r("a/a", "a/b"),            "../a",            "when there is mismatch, we have to get out of the CWD"        );        assert_eq!(            r("a/a", ""),            "a/a",            "empty prefix means nothing happens (and no work is done)"        );        assert_eq!(r("", ""), "", "empty stays empty");    }}