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Add unit tests for unescaping raw (byte) strings

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This commit is contained in:
Igor Matuszewski 2019-06-20 09:37:20 +02:00
parent 5e0c6a69e0
commit 047421e69e
1 changed files with 30 additions and 0 deletions
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30
src/libsyntax/parse/unescape.rs
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@ -569,4 +569,34 @@ fn check(literal_text: &str, expected: &[u8]) {
check("hello \\\r\n world", b"hello world");
check("thread's", b"thread's")
}
#[test]
fn test_unescape_raw_str() {
fn check(literal: &str, expected: &[(Range<usize>, Result<char, EscapeError>)]) {
let mut unescaped = Vec::with_capacity(literal.len());
unescape_raw_str(literal, &mut |range, res| unescaped.push((range, res)));
assert_eq!(unescaped, expected);
}
check("\r\n", &[(0..2, Ok('\n'))]);
check("\r", &[(0..1, Err(EscapeError::BareCarriageReturnInRawString))]);
check("\rx", &[(0..1, Err(EscapeError::BareCarriageReturnInRawString)), (1..2, Ok('x'))]);
}
#[test]
fn test_unescape_raw_byte_str() {
fn check(literal: &str, expected: &[(Range<usize>, Result<u8, EscapeError>)]) {
let mut unescaped = Vec::with_capacity(literal.len());
unescape_raw_byte_str(literal, &mut |range, res| unescaped.push((range, res)));
assert_eq!(unescaped, expected);
}
check("\r\n", &[(0..2, Ok(byte_from_char('\n')))]);
check("\r", &[(0..1, Err(EscapeError::BareCarriageReturnInRawString))]);
check("🦀", &[(0..4, Err(EscapeError::NonAsciiCharInByteString))]);
check(
"🦀a",
&[(0..4, Err(EscapeError::NonAsciiCharInByteString)), (4..5, Ok(byte_from_char('a')))],
);
}
}