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use crate::{Utf32Str, Utf32String};
#[test]
fn test_utf32str_ascii() {
/// Helper function for testing
fn expect_ascii(src: &str, is_ascii: bool) {
let mut buffer = Vec::new();
assert!(Utf32Str::new(src, &mut buffer).is_ascii() == is_ascii);
assert!(Utf32String::from(src).slice(..).is_ascii() == is_ascii);
assert!(Utf32String::from(src.to_owned()).slice(..).is_ascii() == is_ascii);
}
// ascii
expect_ascii("", true);
expect_ascii("a", true);
expect_ascii("a\nb", true);
expect_ascii("\n\r", true);
// not ascii
expect_ascii("aü", false);
expect_ascii("au\u{0308}", false);
// windows-style newline
expect_ascii("a\r\nb", false);
expect_ascii("ü\r\n", false);
expect_ascii("\r\n", false);
}
#[test]
fn test_grapheme_truncation() {
// ascii is preserved
let s = Utf32String::from("ab");
assert_eq!(s.slice(..).get(0), 'a');
assert_eq!(s.slice(..).get(1), 'b');
// windows-style newline is truncated to '\n'
let s = Utf32String::from("\r\n");
assert_eq!(s.slice(..).get(0), '\n');
// normal graphemes are truncated to the first character
let s = Utf32String::from("u\u{0308}\r\n");
assert_eq!(s.slice(..).get(0), 'u');
assert_eq!(s.slice(..).get(1), '\n');
}
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