32b7b50baf
I added it because it was easy (same a `char::to_lowercase`, just a different table), but it doesn’t make sense to have this in std but not str::to_titlecase, which would require https://github.com/unicode-rs/unicode-segmentation At some point in the future this feature will be available (both on char and str) in a crates.io crate.
241 lines
6.6 KiB
Rust
241 lines
6.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[test]
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fn test_is_lowercase() {
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assert!('a'.is_lowercase());
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assert!('ö'.is_lowercase());
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assert!('ß'.is_lowercase());
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assert!(!'Ü'.is_lowercase());
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assert!(!'P'.is_lowercase());
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}
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#[test]
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fn test_is_uppercase() {
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assert!(!'h'.is_uppercase());
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assert!(!'ä'.is_uppercase());
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assert!(!'ß'.is_uppercase());
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assert!('Ö'.is_uppercase());
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assert!('T'.is_uppercase());
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}
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#[test]
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fn test_is_whitespace() {
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assert!(' '.is_whitespace());
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assert!('\u{2007}'.is_whitespace());
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assert!('\t'.is_whitespace());
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assert!('\n'.is_whitespace());
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assert!(!'a'.is_whitespace());
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assert!(!'_'.is_whitespace());
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assert!(!'\u{0}'.is_whitespace());
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}
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#[test]
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fn test_to_digit() {
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assert_eq!('0'.to_digit(10), Some(0));
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assert_eq!('1'.to_digit(2), Some(1));
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assert_eq!('2'.to_digit(3), Some(2));
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assert_eq!('9'.to_digit(10), Some(9));
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assert_eq!('a'.to_digit(16), Some(10));
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assert_eq!('A'.to_digit(16), Some(10));
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assert_eq!('b'.to_digit(16), Some(11));
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assert_eq!('B'.to_digit(16), Some(11));
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assert_eq!('z'.to_digit(36), Some(35));
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assert_eq!('Z'.to_digit(36), Some(35));
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assert_eq!(' '.to_digit(10), None);
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assert_eq!('$'.to_digit(36), None);
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}
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#[test]
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fn test_to_lowercase() {
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fn lower(c: char) -> char {
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let mut it = c.to_lowercase();
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let c = it.next().unwrap();
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// As of Unicode version 7.0.0, `SpecialCasing.txt` has no lower-case mapping
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// to multiple code points.
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assert!(it.next().is_none());
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c
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}
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assert_eq!(lower('A'), 'a');
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assert_eq!(lower('Ö'), 'ö');
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assert_eq!(lower('ß'), 'ß');
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assert_eq!(lower('Ü'), 'ü');
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assert_eq!(lower('💩'), '💩');
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assert_eq!(lower('Σ'), 'σ');
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assert_eq!(lower('Τ'), 'τ');
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assert_eq!(lower('Ι'), 'ι');
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assert_eq!(lower('Γ'), 'γ');
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assert_eq!(lower('Μ'), 'μ');
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assert_eq!(lower('Α'), 'α');
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assert_eq!(lower('Σ'), 'σ');
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assert_eq!(lower('Dž'), 'dž');
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assert_eq!(lower('fi'), 'fi');
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}
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#[test]
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fn test_to_uppercase() {
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fn upper(c: char) -> Vec<char> {
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c.to_uppercase().collect()
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}
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assert_eq!(upper('a'), ['A']);
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assert_eq!(upper('ö'), ['Ö']);
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assert_eq!(upper('ß'), ['S', 'S']); // not ẞ: Latin capital letter sharp s
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assert_eq!(upper('ü'), ['Ü']);
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assert_eq!(upper('💩'), ['💩']);
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assert_eq!(upper('σ'), ['Σ']);
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assert_eq!(upper('τ'), ['Τ']);
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assert_eq!(upper('ι'), ['Ι']);
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assert_eq!(upper('γ'), ['Γ']);
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assert_eq!(upper('μ'), ['Μ']);
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assert_eq!(upper('α'), ['Α']);
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assert_eq!(upper('ς'), ['Σ']);
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assert_eq!(upper('Dž'), ['DŽ']);
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assert_eq!(upper('fi'), ['F', 'I']);
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assert_eq!(upper('ᾀ'), ['Ἀ', 'Ι']);
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}
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#[test]
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fn test_is_control() {
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assert!('\u{0}'.is_control());
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assert!('\u{3}'.is_control());
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assert!('\u{6}'.is_control());
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assert!('\u{9}'.is_control());
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assert!('\u{7f}'.is_control());
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assert!('\u{92}'.is_control());
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assert!(!'\u{20}'.is_control());
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assert!(!'\u{55}'.is_control());
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assert!(!'\u{68}'.is_control());
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}
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#[test]
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fn test_is_digit() {
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assert!('2'.is_numeric());
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assert!('7'.is_numeric());
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assert!(!'c'.is_numeric());
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assert!(!'i'.is_numeric());
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assert!(!'z'.is_numeric());
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assert!(!'Q'.is_numeric());
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}
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#[test]
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fn test_escape_default() {
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fn string(c: char) -> String {
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c.escape_default().collect()
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}
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let s = string('\n');
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assert_eq!(s, "\\n");
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let s = string('\r');
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assert_eq!(s, "\\r");
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let s = string('\'');
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assert_eq!(s, "\\'");
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let s = string('"');
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assert_eq!(s, "\\\"");
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let s = string(' ');
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assert_eq!(s, " ");
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let s = string('a');
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assert_eq!(s, "a");
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let s = string('~');
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assert_eq!(s, "~");
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let s = string('\x00');
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assert_eq!(s, "\\u{0}");
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let s = string('\x1f');
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assert_eq!(s, "\\u{1f}");
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let s = string('\x7f');
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assert_eq!(s, "\\u{7f}");
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let s = string('\u{ff}');
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assert_eq!(s, "\\u{ff}");
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let s = string('\u{11b}');
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assert_eq!(s, "\\u{11b}");
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let s = string('\u{1d4b6}');
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assert_eq!(s, "\\u{1d4b6}");
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}
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#[test]
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fn test_escape_unicode() {
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fn string(c: char) -> String { c.escape_unicode().collect() }
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let s = string('\x00');
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assert_eq!(s, "\\u{0}");
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let s = string('\n');
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assert_eq!(s, "\\u{a}");
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let s = string(' ');
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assert_eq!(s, "\\u{20}");
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let s = string('a');
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assert_eq!(s, "\\u{61}");
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let s = string('\u{11b}');
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assert_eq!(s, "\\u{11b}");
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let s = string('\u{1d4b6}');
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assert_eq!(s, "\\u{1d4b6}");
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}
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#[test]
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fn test_encode_utf8() {
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fn check(input: char, expect: &[u8]) {
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let mut buf = [0; 4];
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let n = input.encode_utf8(&mut buf).unwrap_or(0);
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assert_eq!(&buf[..n], expect);
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}
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check('x', &[0x78]);
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check('\u{e9}', &[0xc3, 0xa9]);
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check('\u{a66e}', &[0xea, 0x99, 0xae]);
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check('\u{1f4a9}', &[0xf0, 0x9f, 0x92, 0xa9]);
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}
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#[test]
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fn test_encode_utf16() {
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fn check(input: char, expect: &[u16]) {
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let mut buf = [0; 2];
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let n = input.encode_utf16(&mut buf).unwrap_or(0);
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assert_eq!(&buf[..n], expect);
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}
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check('x', &[0x0078]);
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check('\u{e9}', &[0x00e9]);
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check('\u{a66e}', &[0xa66e]);
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check('\u{1f4a9}', &[0xd83d, 0xdca9]);
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}
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#[test]
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fn test_len_utf16() {
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assert!('x'.len_utf16() == 1);
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assert!('\u{e9}'.len_utf16() == 1);
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assert!('\u{a66e}'.len_utf16() == 1);
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assert!('\u{1f4a9}'.len_utf16() == 2);
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}
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#[allow(deprecated)]
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#[test]
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fn test_width() {
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assert_eq!('\x00'.width(false),Some(0));
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assert_eq!('\x00'.width(true),Some(0));
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assert_eq!('\x0A'.width(false),None);
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assert_eq!('\x0A'.width(true),None);
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assert_eq!('w'.width(false),Some(1));
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assert_eq!('w'.width(true),Some(1));
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assert_eq!('ｈ'.width(false),Some(2));
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assert_eq!('ｈ'.width(true),Some(2));
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assert_eq!('\u{AD}'.width(false),Some(1));
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assert_eq!('\u{AD}'.width(true),Some(1));
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assert_eq!('\u{1160}'.width(false),Some(0));
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assert_eq!('\u{1160}'.width(true),Some(0));
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assert_eq!('\u{a1}'.width(false),Some(1));
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assert_eq!('\u{a1}'.width(true),Some(2));
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assert_eq!('\u{300}'.width(false),Some(0));
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assert_eq!('\u{300}'.width(true),Some(0));
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}
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