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#![cfg(feature = "raw_os_str")]
use std::ops::Index;
use std::panic;
use std::panic::UnwindSafe;
use os_str_bytes::RawOsStr;
mod common;
use common::RAW_WTF8_STRING;
#[test]
fn test_valid_indices() {
test(0);
test(1);
test(2);
test(3);
test(6);
test(10);
test(11);
test(12);
test(13);
#[track_caller]
fn test(index: usize) {
let _ = RAW_WTF8_STRING.index(index..);
}
}
macro_rules! test {
( $name:ident , $index:literal , $code_point:expr ) => {
// https://github.com/rust-lang/rust/issues/88430
#[test]
fn $name() {
let index_fn = || RAW_WTF8_STRING.index($index..);
if cfg!(unix) {
let _ = index_fn();
return;
}
let error = panic::catch_unwind(index_fn)
.expect_err("test did not panic as expected");
let error: &String =
error.downcast_ref().expect("incorrect panic message type");
assert_eq!(
concat!(
"byte index ",
$index,
" is not a valid boundary; it is inside ",
$code_point
),
error,
);
}
};
}
test!(test_index_4, 4, "U+D83D (bytes 3..6)");
test!(test_index_5, 5, "U+D83D (bytes 3..6)");
test!(test_index_7, 7, "U+1F4A9 (bytes 6..10)");
test!(test_index_8, 8, "U+1F4A9 (bytes 6..10)");
test!(test_index_9, 9, "U+1F4A9 (bytes 6..10)");
#[test]
fn test_index_panics() {
let string = RawOsStr::from_str("\u{F6}");
test(|| string.index(1..2));
test(|| string.index(0..1));
test(|| string.index(1..));
test(|| string.index(0..=0));
test(|| string.index(..1));
test(|| string.index(..=0));
test(|| string.split_at(1));
#[track_caller]
fn test<F, R>(f: F)
where
F: FnOnce() -> R + UnwindSafe,
{
assert_eq!(!cfg!(unix), panic::catch_unwind(f).is_err());
}
}
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