45 lines
1.4 KiB
Rust
45 lines
1.4 KiB
Rust
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use std::convert::TryFrom;
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use std::ops::RangeBounds;
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fn test_char_coverage<R>(n: usize, range: R)
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where
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R: Iterator<Item = char> + RangeBounds<char> + Clone,
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{
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use std::collections::HashSet;
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let all: HashSet<char> = range.clone().collect();
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let mut covered = HashSet::new();
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for _ in 0..n {
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let c = fastrand::char(range.clone());
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assert!(all.contains(&c));
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covered.insert(c);
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}
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assert_eq!(covered, all);
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}
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#[test]
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fn test_char() {
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// ASCII control chars.
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let nul = 0u8 as char;
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let soh = 1u8 as char;
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let stx = 2u8 as char;
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// Some undefined Hangul Jamo codepoints just before
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// the surrogate area.
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let last_jamo = char::try_from(0xd7ffu32).unwrap();
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let penultimate_jamo = char::try_from(last_jamo as u32 - 1).unwrap();
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// Private-use codepoints just after the surrogate area.
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let first_private = char::try_from(0xe000u32).unwrap();
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let second_private = char::try_from(first_private as u32 + 1).unwrap();
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// Private-use codepoints at the end of Unicode space.
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let last_private = std::char::MAX;
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let penultimate_private = char::try_from(last_private as u32 - 1).unwrap();
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test_char_coverage(100, nul..stx);
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test_char_coverage(100, nul..=soh);
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test_char_coverage(400, penultimate_jamo..second_private);
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test_char_coverage(400, penultimate_jamo..=second_private);
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test_char_coverage(100, penultimate_private..=last_private);
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}
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