1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
12 use std::convert::TryFrom;
13 use std::str::FromStr;
17 assert_eq!(u32::from('a'), 0x61);
18 assert_eq!(char::from(b'\0'), '\0');
19 assert_eq!(char::from(b'a'), 'a');
20 assert_eq!(char::from(b'\xFF'), '\u{FF}');
21 assert_eq!(char::try_from(0_u32), Ok('\0'));
22 assert_eq!(char::try_from(0x61_u32), Ok('a'));
23 assert_eq!(char::try_from(0xD7FF_u32), Ok('\u{D7FF}'));
24 assert!(char::try_from(0xD800_u32).is_err());
25 assert!(char::try_from(0xDFFF_u32).is_err());
26 assert_eq!(char::try_from(0xE000_u32), Ok('\u{E000}'));
27 assert_eq!(char::try_from(0x10FFFF_u32), Ok('\u{10FFFF}'));
28 assert!(char::try_from(0x110000_u32).is_err());
29 assert!(char::try_from(0xFFFF_FFFF_u32).is_err());
34 assert_eq!(char::from_str("a").unwrap(), 'a');
35 assert_eq!(char::from_str("\0").unwrap(), '\0');
36 assert_eq!(char::from_str("\u{D7FF}").unwrap(), '\u{d7FF}');
37 assert!(char::from_str("").is_err());
38 assert!(char::from_str("abc").is_err());
42 fn test_is_lowercase() {
43 assert!('a'.is_lowercase());
44 assert!('ö'.is_lowercase());
45 assert!('ß'.is_lowercase());
46 assert!(!'Ü'.is_lowercase());
47 assert!(!'P'.is_lowercase());
51 fn test_is_uppercase() {
52 assert!(!'h'.is_uppercase());
53 assert!(!'ä'.is_uppercase());
54 assert!(!'ß'.is_uppercase());
55 assert!('Ö'.is_uppercase());
56 assert!('T'.is_uppercase());
60 fn test_is_whitespace() {
61 assert!(' '.is_whitespace());
62 assert!('\u{2007}'.is_whitespace());
63 assert!('\t'.is_whitespace());
64 assert!('\n'.is_whitespace());
65 assert!(!'a'.is_whitespace());
66 assert!(!'_'.is_whitespace());
67 assert!(!'\u{0}'.is_whitespace());
72 assert_eq!('0'.to_digit(10), Some(0));
73 assert_eq!('1'.to_digit(2), Some(1));
74 assert_eq!('2'.to_digit(3), Some(2));
75 assert_eq!('9'.to_digit(10), Some(9));
76 assert_eq!('a'.to_digit(16), Some(10));
77 assert_eq!('A'.to_digit(16), Some(10));
78 assert_eq!('b'.to_digit(16), Some(11));
79 assert_eq!('B'.to_digit(16), Some(11));
80 assert_eq!('z'.to_digit(36), Some(35));
81 assert_eq!('Z'.to_digit(36), Some(35));
82 assert_eq!(' '.to_digit(10), None);
83 assert_eq!('$'.to_digit(36), None);
87 fn test_to_lowercase() {
88 fn lower(c: char) -> String {
89 let iter: String = c.to_lowercase().collect();
90 let disp: String = c.to_lowercase().to_string();
91 assert_eq!(iter, disp);
94 assert_eq!(lower('A'), "a");
95 assert_eq!(lower('Ö'), "ö");
96 assert_eq!(lower('ß'), "ß");
97 assert_eq!(lower('Ü'), "ü");
98 assert_eq!(lower('💩'), "💩");
99 assert_eq!(lower('Σ'), "σ");
100 assert_eq!(lower('Τ'), "τ");
101 assert_eq!(lower('Ι'), "ι");
102 assert_eq!(lower('Γ'), "γ");
103 assert_eq!(lower('Μ'), "μ");
104 assert_eq!(lower('Α'), "α");
105 assert_eq!(lower('Σ'), "σ");
106 assert_eq!(lower('Dž'), "dž");
107 assert_eq!(lower('fi'), "fi");
108 assert_eq!(lower('İ'), "i\u{307}");
112 fn test_to_uppercase() {
113 fn upper(c: char) -> String {
114 let iter: String = c.to_uppercase().collect();
115 let disp: String = c.to_uppercase().to_string();
116 assert_eq!(iter, disp);
119 assert_eq!(upper('a'), "A");
120 assert_eq!(upper('ö'), "Ö");
121 assert_eq!(upper('ß'), "SS"); // not ẞ: Latin capital letter sharp s
122 assert_eq!(upper('ü'), "Ü");
123 assert_eq!(upper('💩'), "💩");
125 assert_eq!(upper('σ'), "Σ");
126 assert_eq!(upper('τ'), "Τ");
127 assert_eq!(upper('ι'), "Ι");
128 assert_eq!(upper('γ'), "Γ");
129 assert_eq!(upper('μ'), "Μ");
130 assert_eq!(upper('α'), "Α");
131 assert_eq!(upper('ς'), "Σ");
132 assert_eq!(upper('Dž'), "DŽ");
133 assert_eq!(upper('fi'), "FI");
134 assert_eq!(upper('ᾀ'), "ἈΙ");
138 fn test_is_control() {
139 assert!('\u{0}'.is_control());
140 assert!('\u{3}'.is_control());
141 assert!('\u{6}'.is_control());
142 assert!('\u{9}'.is_control());
143 assert!('\u{7f}'.is_control());
144 assert!('\u{92}'.is_control());
145 assert!(!'\u{20}'.is_control());
146 assert!(!'\u{55}'.is_control());
147 assert!(!'\u{68}'.is_control());
152 assert!('2'.is_numeric());
153 assert!('7'.is_numeric());
154 assert!(!'c'.is_numeric());
155 assert!(!'i'.is_numeric());
156 assert!(!'z'.is_numeric());
157 assert!(!'Q'.is_numeric());
161 fn test_escape_debug() {
162 fn string(c: char) -> String {
163 let iter: String = c.escape_debug().collect();
164 let disp: String = c.escape_debug().to_string();
165 assert_eq!(iter, disp);
168 assert_eq!(string('\n'), "\\n");
169 assert_eq!(string('\r'), "\\r");
170 assert_eq!(string('\''), "\\'");
171 assert_eq!(string('"'), "\\\"");
172 assert_eq!(string(' '), " ");
173 assert_eq!(string('a'), "a");
174 assert_eq!(string('~'), "~");
175 assert_eq!(string('é'), "é");
176 assert_eq!(string('文'), "文");
177 assert_eq!(string('\x00'), "\\u{0}");
178 assert_eq!(string('\x1f'), "\\u{1f}");
179 assert_eq!(string('\x7f'), "\\u{7f}");
180 assert_eq!(string('\u{80}'), "\\u{80}");
181 assert_eq!(string('\u{ff}'), "\u{ff}");
182 assert_eq!(string('\u{11b}'), "\u{11b}");
183 assert_eq!(string('\u{1d4b6}'), "\u{1d4b6}");
184 assert_eq!(string('\u{301}'), "\\u{301}"); // combining character
185 assert_eq!(string('\u{200b}'),"\\u{200b}"); // zero width space
186 assert_eq!(string('\u{e000}'), "\\u{e000}"); // private use 1
187 assert_eq!(string('\u{100000}'), "\\u{100000}"); // private use 2
191 fn test_escape_default() {
192 fn string(c: char) -> String {
193 let iter: String = c.escape_default().collect();
194 let disp: String = c.escape_default().to_string();
195 assert_eq!(iter, disp);
198 assert_eq!(string('\n'), "\\n");
199 assert_eq!(string('\r'), "\\r");
200 assert_eq!(string('\''), "\\'");
201 assert_eq!(string('"'), "\\\"");
202 assert_eq!(string(' '), " ");
203 assert_eq!(string('a'), "a");
204 assert_eq!(string('~'), "~");
205 assert_eq!(string('é'), "\\u{e9}");
206 assert_eq!(string('\x00'), "\\u{0}");
207 assert_eq!(string('\x1f'), "\\u{1f}");
208 assert_eq!(string('\x7f'), "\\u{7f}");
209 assert_eq!(string('\u{80}'), "\\u{80}");
210 assert_eq!(string('\u{ff}'), "\\u{ff}");
211 assert_eq!(string('\u{11b}'), "\\u{11b}");
212 assert_eq!(string('\u{1d4b6}'), "\\u{1d4b6}");
213 assert_eq!(string('\u{200b}'), "\\u{200b}"); // zero width space
214 assert_eq!(string('\u{e000}'), "\\u{e000}"); // private use 1
215 assert_eq!(string('\u{100000}'), "\\u{100000}"); // private use 2
219 fn test_escape_unicode() {
220 fn string(c: char) -> String {
221 let iter: String = c.escape_unicode().collect();
222 let disp: String = c.escape_unicode().to_string();
223 assert_eq!(iter, disp);
227 assert_eq!(string('\x00'), "\\u{0}");
228 assert_eq!(string('\n'), "\\u{a}");
229 assert_eq!(string(' '), "\\u{20}");
230 assert_eq!(string('a'), "\\u{61}");
231 assert_eq!(string('\u{11b}'), "\\u{11b}");
232 assert_eq!(string('\u{1d4b6}'), "\\u{1d4b6}");
236 fn test_encode_utf8() {
237 fn check(input: char, expect: &[u8]) {
238 let mut buf = [0; 4];
239 let ptr = buf.as_ptr();
240 let s = input.encode_utf8(&mut buf);
241 assert_eq!(s.as_ptr() as usize, ptr as usize);
242 assert!(str::from_utf8(s.as_bytes()).is_ok());
243 assert_eq!(s.as_bytes(), expect);
247 check('\u{e9}', &[0xc3, 0xa9]);
248 check('\u{a66e}', &[0xea, 0x99, 0xae]);
249 check('\u{1f4a9}', &[0xf0, 0x9f, 0x92, 0xa9]);
253 fn test_encode_utf16() {
254 fn check(input: char, expect: &[u16]) {
255 let mut buf = [0; 2];
256 let ptr = buf.as_mut_ptr();
257 let b = input.encode_utf16(&mut buf);
258 assert_eq!(b.as_mut_ptr() as usize, ptr as usize);
259 assert_eq!(b, expect);
262 check('x', &[0x0078]);
263 check('\u{e9}', &[0x00e9]);
264 check('\u{a66e}', &[0xa66e]);
265 check('\u{1f4a9}', &[0xd83d, 0xdca9]);
269 fn test_len_utf16() {
270 assert!('x'.len_utf16() == 1);
271 assert!('\u{e9}'.len_utf16() == 1);
272 assert!('\u{a66e}'.len_utf16() == 1);
273 assert!('\u{1f4a9}'.len_utf16() == 2);
277 fn test_decode_utf16() {
278 fn check(s: &[u16], expected: &[Result<char, u16>]) {
279 let v = char::decode_utf16(s.iter().cloned())
280 .map(|r| r.map_err(|e| e.unpaired_surrogate()))
281 .collect::<Vec<_>>();
282 assert_eq!(v, expected);
284 check(&[0xD800, 0x41, 0x42], &[Err(0xD800), Ok('A'), Ok('B')]);
285 check(&[0xD800, 0], &[Err(0xD800), Ok('\0')]);
289 fn ed_iterator_specializations() {
291 assert_eq!('\n'.escape_default().count(), 2);
292 assert_eq!('c'.escape_default().count(), 1);
293 assert_eq!(' '.escape_default().count(), 1);
294 assert_eq!('\\'.escape_default().count(), 2);
295 assert_eq!('\''.escape_default().count(), 2);
299 // Check that OoB is handled correctly
300 assert_eq!('\n'.escape_default().nth(2), None);
301 assert_eq!('c'.escape_default().nth(1), None);
302 assert_eq!(' '.escape_default().nth(1), None);
303 assert_eq!('\\'.escape_default().nth(2), None);
304 assert_eq!('\''.escape_default().nth(2), None);
306 // Check the first char
307 assert_eq!('\n'.escape_default().nth(0), Some('\\'));
308 assert_eq!('c'.escape_default().nth(0), Some('c'));
309 assert_eq!(' '.escape_default().nth(0), Some(' '));
310 assert_eq!('\\'.escape_default().nth(0), Some('\\'));
311 assert_eq!('\''.escape_default().nth(0), Some('\\'));
313 // Check the second char
314 assert_eq!('\n'.escape_default().nth(1), Some('n'));
315 assert_eq!('\\'.escape_default().nth(1), Some('\\'));
316 assert_eq!('\''.escape_default().nth(1), Some('\''));
318 // Check the last char
319 assert_eq!('\n'.escape_default().last(), Some('n'));
320 assert_eq!('c'.escape_default().last(), Some('c'));
321 assert_eq!(' '.escape_default().last(), Some(' '));
322 assert_eq!('\\'.escape_default().last(), Some('\\'));
323 assert_eq!('\''.escape_default().last(), Some('\''));
327 fn eu_iterator_specializations() {
329 let len = c.escape_unicode().count();
332 assert_eq!(c.escape_unicode().nth(len), None);
334 // For all possible in-bound offsets
335 let mut iter = c.escape_unicode();
336 for offset in 0..len {
338 assert_eq!(iter.clone().last(), Some('}'));
341 assert_eq!(iter.len(), len - offset);
343 // Check size_hint (= len in ExactSizeIterator)
344 assert_eq!(iter.size_hint(), (iter.len(), Some(iter.len())));
347 assert_eq!(iter.clone().count(), len - offset);
350 assert_eq!(c.escape_unicode().nth(offset), iter.next());
354 assert_eq!(iter.clone().last(), None);
355 assert_eq!(iter.clone().count(), 0);