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|
use super::*;
use expect_test::{expect, Expect};
fn check_raw_str(s: &str, expected: Result<u8, RawStrError>) {
let s = &format!("r{}", s);
let mut cursor = Cursor::new(s);
cursor.bump();
let res = cursor.raw_double_quoted_string(0);
assert_eq!(res, expected);
}
#[test]
fn test_naked_raw_str() {
check_raw_str(r#""abc""#, Ok(0));
}
#[test]
fn test_raw_no_start() {
check_raw_str(r##""abc"#"##, Ok(0));
}
#[test]
fn test_too_many_terminators() {
// this error is handled in the parser later
check_raw_str(r###"#"abc"##"###, Ok(1));
}
#[test]
fn test_unterminated() {
check_raw_str(
r#"#"abc"#,
Err(RawStrError::NoTerminator { expected: 1, found: 0, possible_terminator_offset: None }),
);
check_raw_str(
r###"##"abc"#"###,
Err(RawStrError::NoTerminator {
expected: 2,
found: 1,
possible_terminator_offset: Some(7),
}),
);
// We're looking for "# not just any #
check_raw_str(
r###"##"abc#"###,
Err(RawStrError::NoTerminator { expected: 2, found: 0, possible_terminator_offset: None }),
)
}
#[test]
fn test_invalid_start() {
check_raw_str(r##"#~"abc"#"##, Err(RawStrError::InvalidStarter { bad_char: '~' }));
}
#[test]
fn test_unterminated_no_pound() {
// https://github.com/rust-lang/rust/issues/70677
check_raw_str(
r#"""#,
Err(RawStrError::NoTerminator { expected: 0, found: 0, possible_terminator_offset: None }),
);
}
#[test]
fn test_too_many_hashes() {
let max_count = u8::MAX;
let hashes1 = "#".repeat(max_count as usize);
let hashes2 = "#".repeat(max_count as usize + 1);
let middle = "\"abc\"";
let s1 = [&hashes1, middle, &hashes1].join("");
let s2 = [&hashes2, middle, &hashes2].join("");
// Valid number of hashes (255 = 2^8 - 1 = u8::MAX).
check_raw_str(&s1, Ok(255));
// One more hash sign (256 = 2^8) becomes too many.
check_raw_str(&s2, Err(RawStrError::TooManyDelimiters { found: u32::from(max_count) + 1 }));
}
#[test]
fn test_valid_shebang() {
// https://github.com/rust-lang/rust/issues/70528
let input = "#!/usr/bin/rustrun\nlet x = 5;";
assert_eq!(strip_shebang(input), Some(18));
}
#[test]
fn test_invalid_shebang_valid_rust_syntax() {
// https://github.com/rust-lang/rust/issues/70528
let input = "#! [bad_attribute]";
assert_eq!(strip_shebang(input), None);
}
#[test]
fn test_shebang_second_line() {
// Because shebangs are interpreted by the kernel, they must be on the first line
let input = "\n#!/bin/bash";
assert_eq!(strip_shebang(input), None);
}
#[test]
fn test_shebang_space() {
let input = "#! /bin/bash";
assert_eq!(strip_shebang(input), Some(input.len()));
}
#[test]
fn test_shebang_empty_shebang() {
let input = "#! \n[attribute(foo)]";
assert_eq!(strip_shebang(input), None);
}
#[test]
fn test_invalid_shebang_comment() {
let input = "#!//bin/ami/a/comment\n[";
assert_eq!(strip_shebang(input), None)
}
#[test]
fn test_invalid_shebang_another_comment() {
let input = "#!/*bin/ami/a/comment*/\n[attribute";
assert_eq!(strip_shebang(input), None)
}
#[test]
fn test_shebang_valid_rust_after() {
let input = "#!/*bin/ami/a/comment*/\npub fn main() {}";
assert_eq!(strip_shebang(input), Some(23))
}
#[test]
fn test_shebang_followed_by_attrib() {
let input = "#!/bin/rust-scripts\n#![allow_unused(true)]";
assert_eq!(strip_shebang(input), Some(19));
}
fn check_lexing(src: &str, expect: Expect) {
let actual: String = tokenize(src).map(|token| format!("{:?}\n", token)).collect();
expect.assert_eq(&actual)
}
#[test]
fn smoke_test() {
check_lexing(
"/* my source file */ fn main() { println!(\"zebra\"); }\n",
expect![[r#"
Token { kind: BlockComment { doc_style: None, terminated: true }, len: 20 }
Token { kind: Whitespace, len: 1 }
Token { kind: Ident, len: 2 }
Token { kind: Whitespace, len: 1 }
Token { kind: Ident, len: 4 }
Token { kind: OpenParen, len: 1 }
Token { kind: CloseParen, len: 1 }
Token { kind: Whitespace, len: 1 }
Token { kind: OpenBrace, len: 1 }
Token { kind: Whitespace, len: 1 }
Token { kind: Ident, len: 7 }
Token { kind: Bang, len: 1 }
Token { kind: OpenParen, len: 1 }
Token { kind: Literal { kind: Str { terminated: true }, suffix_start: 7 }, len: 7 }
Token { kind: CloseParen, len: 1 }
Token { kind: Semi, len: 1 }
Token { kind: Whitespace, len: 1 }
Token { kind: CloseBrace, len: 1 }
Token { kind: Whitespace, len: 1 }
"#]],
)
}
#[test]
fn comment_flavors() {
check_lexing(
r"
// line
//// line as well
/// outer doc line
//! inner doc line
/* block */
/**/
/*** also block */
/** outer doc block */
/*! inner doc block */
",
expect![[r#"
Token { kind: Whitespace, len: 1 }
Token { kind: LineComment { doc_style: None }, len: 7 }
Token { kind: Whitespace, len: 1 }
Token { kind: LineComment { doc_style: None }, len: 17 }
Token { kind: Whitespace, len: 1 }
Token { kind: LineComment { doc_style: Some(Outer) }, len: 18 }
Token { kind: Whitespace, len: 1 }
Token { kind: LineComment { doc_style: Some(Inner) }, len: 18 }
Token { kind: Whitespace, len: 1 }
Token { kind: BlockComment { doc_style: None, terminated: true }, len: 11 }
Token { kind: Whitespace, len: 1 }
Token { kind: BlockComment { doc_style: None, terminated: true }, len: 4 }
Token { kind: Whitespace, len: 1 }
Token { kind: BlockComment { doc_style: None, terminated: true }, len: 18 }
Token { kind: Whitespace, len: 1 }
Token { kind: BlockComment { doc_style: Some(Outer), terminated: true }, len: 22 }
Token { kind: Whitespace, len: 1 }
Token { kind: BlockComment { doc_style: Some(Inner), terminated: true }, len: 22 }
Token { kind: Whitespace, len: 1 }
"#]],
)
}
#[test]
fn nested_block_comments() {
check_lexing(
"/* /* */ */'a'",
expect![[r#"
Token { kind: BlockComment { doc_style: None, terminated: true }, len: 11 }
Token { kind: Literal { kind: Char { terminated: true }, suffix_start: 3 }, len: 3 }
"#]],
)
}
#[test]
fn characters() {
check_lexing(
"'a' ' ' '\\n'",
expect![[r#"
Token { kind: Literal { kind: Char { terminated: true }, suffix_start: 3 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Char { terminated: true }, suffix_start: 3 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Char { terminated: true }, suffix_start: 4 }, len: 4 }
"#]],
);
}
#[test]
fn lifetime() {
check_lexing(
"'abc",
expect![[r#"
Token { kind: Lifetime { starts_with_number: false }, len: 4 }
"#]],
);
}
#[test]
fn raw_string() {
check_lexing(
"r###\"\"#a\\b\x00c\"\"###",
expect![[r#"
Token { kind: Literal { kind: RawStr { n_hashes: Some(3) }, suffix_start: 17 }, len: 17 }
"#]],
)
}
#[test]
fn literal_suffixes() {
check_lexing(
r####"
'a'
b'a'
"a"
b"a"
1234
0b101
0xABC
1.0
1.0e10
2us
r###"raw"###suffix
br###"raw"###suffix
"####,
expect![[r#"
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Char { terminated: true }, suffix_start: 3 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Byte { terminated: true }, suffix_start: 4 }, len: 4 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Str { terminated: true }, suffix_start: 3 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: ByteStr { terminated: true }, suffix_start: 4 }, len: 4 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Int { base: Decimal, empty_int: false }, suffix_start: 4 }, len: 4 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Int { base: Binary, empty_int: false }, suffix_start: 5 }, len: 5 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Int { base: Hexadecimal, empty_int: false }, suffix_start: 5 }, len: 5 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Float { base: Decimal, empty_exponent: false }, suffix_start: 3 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Float { base: Decimal, empty_exponent: false }, suffix_start: 6 }, len: 6 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: Int { base: Decimal, empty_int: false }, suffix_start: 1 }, len: 3 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: RawStr { n_hashes: Some(3) }, suffix_start: 12 }, len: 18 }
Token { kind: Whitespace, len: 1 }
Token { kind: Literal { kind: RawByteStr { n_hashes: Some(3) }, suffix_start: 13 }, len: 19 }
Token { kind: Whitespace, len: 1 }
"#]],
)
}
|
