use git_refspec::{    instruction::Fetch,    parse::{Error, Operation},    Instruction,}; use crate::parse::{assert_parse, b, try_parse}; #[test]fn revspecs_are_disallowed() {    for spec in ["main~1", "^@^{}", "HEAD:main~1"] {        assert!(matches!(            try_parse(spec, Operation::Fetch).unwrap_err(),            Error::ReferenceName(_)        ));    }} #[test]fn object_hash_as_source() {    assert_parse(        "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391:",        Instruction::Fetch(Fetch::Only {            src: b("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"),        }),    );} #[test]fn object_hash_destination_are_valid_as_they_might_be_a_strange_partial_branch_name() {    assert_parse(        "a:e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",        Instruction::Fetch(Fetch::AndUpdate {            src: b("a"),            dst: b("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"),            allow_non_fast_forward: false,        }),    );} #[test]fn negative_must_not_be_empty() {    assert!(matches!(        try_parse("^", Operation::Fetch).unwrap_err(),        Error::NegativeEmpty    ));} #[test]fn negative_must_not_be_object_hash() {    assert!(matches!(        try_parse("^e69de29bb2d1d6434b8b29ae775ad8c2e48c5391", Operation::Fetch).unwrap_err(),        Error::NegativeObjectHash    ));} #[test]fn negative_with_destination() {    for spec in ["^a:b", "^a:", "^:", "^:b"] {        assert!(matches!(            try_parse(spec, Operation::Fetch).unwrap_err(),            Error::NegativeWithDestination        ));    }} #[test]fn exclude() {    assert!(matches!(        try_parse("^a", Operation::Fetch).unwrap_err(),        Error::NegativePartialName    ));    assert!(matches!(        try_parse("^a*", Operation::Fetch).unwrap_err(),        Error::NegativeGlobPattern    ));    assert_parse(        "^refs/heads/a",        Instruction::Fetch(Fetch::Exclude { src: b("refs/heads/a") }),    );} #[test]fn ampersand_is_resolved_to_head() {    assert_parse("@", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));    assert_parse("+@", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));    assert_parse("^@", Instruction::Fetch(Fetch::Exclude { src: b("HEAD") }));} #[test]fn lhs_colon_empty_fetches_only() {    assert_parse("src:", Instruction::Fetch(Fetch::Only { src: b("src") }));    assert_parse("+src:", Instruction::Fetch(Fetch::Only { src: b("src") }));} #[test]fn lhs_colon_rhs_updates_single_ref() {    assert_parse(        "a:b",        Instruction::Fetch(Fetch::AndUpdate {            src: b("a"),            dst: b("b"),            allow_non_fast_forward: false,        }),    );    assert_parse(        "+a:b",        Instruction::Fetch(Fetch::AndUpdate {            src: b("a"),            dst: b("b"),            allow_non_fast_forward: true,        }),    );     assert_parse(        "a/*:b/*",        Instruction::Fetch(Fetch::AndUpdate {            src: b("a/*"),            dst: b("b/*"),            allow_non_fast_forward: false,        }),    );    assert_parse(        "+a/*:b/*",        Instruction::Fetch(Fetch::AndUpdate {            src: b("a/*"),            dst: b("b/*"),            allow_non_fast_forward: true,        }),    );} #[test]fn empty_lhs_colon_rhs_fetches_head_to_destination() {    assert_parse(        ":a",        Instruction::Fetch(Fetch::AndUpdate {            src: b("HEAD"),            dst: b("a"),            allow_non_fast_forward: false,        }),    );     assert_parse(        "+:a",        Instruction::Fetch(Fetch::AndUpdate {            src: b("HEAD"),            dst: b("a"),            allow_non_fast_forward: true,        }),    );} #[test]fn colon_alone_is_for_fetching_head_into_fetchhead() {    assert_parse(":", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));    assert_parse("+:", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));} #[test]fn ampersand_on_left_hand_side_is_head() {    assert_parse("@:", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));    assert_parse(        "@:HEAD",        Instruction::Fetch(Fetch::AndUpdate {            src: b("HEAD"),            dst: b("HEAD"),            allow_non_fast_forward: false,        }),    );} #[test]fn empty_refspec_is_enough_for_fetching_head_into_fetchhead() {    assert_parse("", Instruction::Fetch(Fetch::Only { src: b("HEAD") }));}