use git_attributes::ignore::pattern::Mode;use git_testtools::fixture_bytes; #[test]fn byte_order_marks_are_no_patterns() {    assert_eq!(        git_attributes::parse::ignore("\u{feff}hello".as_bytes()).next(),        Some((r"hello".into(), Mode::NO_SUB_DIR, 1))    );} #[test]fn line_numbers_are_counted_correctly() {    let input = fixture_bytes("ignore/various.txt");    let actual: Vec<_> = git_attributes::parse::ignore(&input).collect();    assert_eq!(        actual,        vec![            ("*.[oa]".into(), Mode::NO_SUB_DIR, 2),            ("*.html".into(), Mode::NO_SUB_DIR | Mode::ENDS_WITH, 5),            ("foo.html".into(), Mode::NO_SUB_DIR | Mode::NEGATIVE, 8),            ("/*".into(), Mode::empty(), 11),            ("/foo".into(), Mode::NEGATIVE, 12),            ("/foo/*".into(), Mode::empty(), 13),            ("/foo/bar".into(), Mode::NEGATIVE, 14)        ]    );} #[test]fn line_endings_can_be_windows_or_unix() {    assert_eq!(        git_attributes::parse::ignore(b"unix\nwindows\r\nlast").collect::<Vec<_>>(),        vec![            (r"unix".into(), Mode::NO_SUB_DIR, 1),            (r"windows".into(), Mode::NO_SUB_DIR, 2),            (r"last".into(), Mode::NO_SUB_DIR, 3)        ]    );} #[test]fn mark_ends_with_pattern_specifically() {    assert_eq!(        git_attributes::parse::ignore(br"*literal").next(),        Some((r"*literal".into(), Mode::NO_SUB_DIR | Mode::ENDS_WITH, 1))    );    assert_eq!(        git_attributes::parse::ignore(br"**literal").next(),        Some((r"**literal".into(), Mode::NO_SUB_DIR, 1)),        "double-asterisk won't allow for fast comparisons"    );    assert_eq!(        git_attributes::parse::ignore(br"*litera[l]").next(),        Some((r"*litera[l]".into(), Mode::NO_SUB_DIR, 1))    );    assert_eq!(        git_attributes::parse::ignore(br"*litera?").next(),        Some((r"*litera?".into(), Mode::NO_SUB_DIR, 1))    );    assert_eq!(        git_attributes::parse::ignore(br"*litera\?").next(),        Some((r"*litera\?".into(), Mode::NO_SUB_DIR, 1)),        "for now we don't handle escapes properly like git seems to do"    );} #[test]fn comments_are_ignored_as_well_as_empty_ones() {    assert!(git_attributes::parse::ignore(b"# hello world").next().is_none());    assert!(git_attributes::parse::ignore(b"\n\r\n\t\t   \n").next().is_none());} #[test]fn backslashes_before_hashes_are_no_comments() {    assert_eq!(        git_attributes::parse::ignore(br"\#hello").next(),        Some((r"#hello".into(), Mode::NO_SUB_DIR, 1))    );} #[test]fn backslashes_are_part_of_the_pattern_if_not_in_specific_positions() {    assert_eq!(        git_attributes::parse::ignore(br"\hello\world").next(),        Some((r"\hello\world".into(), Mode::NO_SUB_DIR, 1))    );} #[test]fn leading_exclamation_mark_negates_pattern() {    assert_eq!(        git_attributes::parse::ignore(b"!hello").next(),        Some(("hello".into(), Mode::NEGATIVE | Mode::NO_SUB_DIR, 1))    );} #[test]fn leading_exclamation_marks_can_be_escaped_with_backslash() {    assert_eq!(        git_attributes::parse::ignore(br"\!hello").next(),        Some(("!hello".into(), Mode::NO_SUB_DIR, 1))    );} #[test]fn absence_of_sub_directories_are_marked() {    assert_eq!(        git_attributes::parse::ignore(br"a/b").next(),        Some(("a/b".into(), Mode::empty(), 1))    );    assert_eq!(        git_attributes::parse::ignore(br"ab").next(),        Some(("ab".into(), Mode::NO_SUB_DIR, 1))    );} #[test]fn trailing_slashes_are_marked_and_removed() {    assert_eq!(        git_attributes::parse::ignore(b"dir/").next(),        Some(("dir".into(), Mode::MUST_BE_DIR | Mode::NO_SUB_DIR, 1))    );    assert_eq!(        git_attributes::parse::ignore(b"dir///").next(),        Some(("dir//".into(), Mode::MUST_BE_DIR, 1)),        "but only the last slash is removed"    );} #[test]fn trailing_spaces_are_ignored() {    assert_eq!(        git_attributes::parse::ignore(br"a   ").next(),        Some(("a".into(), Mode::NO_SUB_DIR, 1))    );    assert_eq!(        git_attributes::parse::ignore(b"a\t\t  ").next(),        Some(("a\t\t".into(), Mode::NO_SUB_DIR, 1)),        "trailing tabs are not ignored"    );} #[test]fn trailing_spaces_can_be_escaped_to_be_literal() {    assert_eq!(        git_attributes::parse::ignore(br"a  \ ").next(),        Some(("a   ".into(), Mode::NO_SUB_DIR, 1)),        "a single escape in front of the last desired space is enough"    );    assert_eq!(        git_attributes::parse::ignore(br"a  b  c ").next(),        Some(("a  b  c".into(), Mode::NO_SUB_DIR, 1)),        "spaces in the middle are fine"    );    assert_eq!(        git_attributes::parse::ignore(br"a\ \ \ ").next(),        Some(("a   ".into(), Mode::NO_SUB_DIR, 1)),        "one can also escape every single one"    );    assert_eq!(        git_attributes::parse::ignore(br"a \  ").next(),        Some(("a  ".into(), Mode::NO_SUB_DIR, 1)),        "or just the one in the middle, losing the last actual space"    );    assert_eq!(        git_attributes::parse::ignore(br"a   \").next(),        Some(("a   ".into(), Mode::NO_SUB_DIR, 1)),        "escaping nothing also works as a whitespace protection"    );    assert_eq!(        git_attributes::parse::ignore(br"a   \\\ ").next(),        Some((r"a    ".into(), Mode::NO_SUB_DIR, 1)),        "strange things like these work too"    );    assert_eq!(        git_attributes::parse::ignore(br"a   \\ ").next(),        Some((r"a   ".into(), Mode::NO_SUB_DIR, 1)),        "strange things like these work as well"    );}