mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
28162ad970
According to Godbolt¹, on x86_64 using binary and produces slightly better code than using subtraction. Readability of both is pretty much equivalent so might just as well use the shorter option. ¹ https://rust.godbolt.org/z/9jM3ejbMx
420 lines
13 KiB
Rust
420 lines
13 KiB
Rust
use std::convert::TryFrom;
|
||
use std::str::FromStr;
|
||
use std::{char, str};
|
||
|
||
#[test]
|
||
fn test_convert() {
|
||
assert_eq!(u32::from('a'), 0x61);
|
||
assert_eq!(u64::from('b'), 0x62);
|
||
assert_eq!(u128::from('c'), 0x63);
|
||
assert_eq!(char::from(b'\0'), '\0');
|
||
assert_eq!(char::from(b'a'), 'a');
|
||
assert_eq!(char::from(b'\xFF'), '\u{FF}');
|
||
assert_eq!(char::try_from(0_u32), Ok('\0'));
|
||
assert_eq!(char::try_from(0x61_u32), Ok('a'));
|
||
assert_eq!(char::try_from(0xD7FF_u32), Ok('\u{D7FF}'));
|
||
assert!(char::try_from(0xD800_u32).is_err());
|
||
assert!(char::try_from(0xDFFF_u32).is_err());
|
||
assert_eq!(char::try_from(0xE000_u32), Ok('\u{E000}'));
|
||
assert_eq!(char::try_from(0x10FFFF_u32), Ok('\u{10FFFF}'));
|
||
assert!(char::try_from(0x110000_u32).is_err());
|
||
assert!(char::try_from(0xFFFF_FFFF_u32).is_err());
|
||
}
|
||
|
||
#[test]
|
||
const fn test_convert_const() {
|
||
assert!(u32::from('a') == 0x61);
|
||
assert!(u64::from('b') == 0x62);
|
||
assert!(u128::from('c') == 0x63);
|
||
assert!(char::from(b'\0') == '\0');
|
||
assert!(char::from(b'a') == 'a');
|
||
assert!(char::from(b'\xFF') == '\u{FF}');
|
||
}
|
||
|
||
#[test]
|
||
fn test_from_str() {
|
||
assert_eq!(char::from_str("a").unwrap(), 'a');
|
||
assert_eq!(char::from_str("\0").unwrap(), '\0');
|
||
assert_eq!(char::from_str("\u{D7FF}").unwrap(), '\u{d7FF}');
|
||
assert!(char::from_str("").is_err());
|
||
assert!(char::from_str("abc").is_err());
|
||
}
|
||
|
||
#[test]
|
||
fn test_is_lowercase() {
|
||
assert!('a'.is_lowercase());
|
||
assert!('ö'.is_lowercase());
|
||
assert!('ß'.is_lowercase());
|
||
assert!(!'Ü'.is_lowercase());
|
||
assert!(!'P'.is_lowercase());
|
||
}
|
||
|
||
#[test]
|
||
fn test_is_uppercase() {
|
||
assert!(!'h'.is_uppercase());
|
||
assert!(!'ä'.is_uppercase());
|
||
assert!(!'ß'.is_uppercase());
|
||
assert!('Ö'.is_uppercase());
|
||
assert!('T'.is_uppercase());
|
||
}
|
||
|
||
#[test]
|
||
fn test_is_whitespace() {
|
||
assert!(' '.is_whitespace());
|
||
assert!('\u{2007}'.is_whitespace());
|
||
assert!('\t'.is_whitespace());
|
||
assert!('\n'.is_whitespace());
|
||
assert!(!'a'.is_whitespace());
|
||
assert!(!'_'.is_whitespace());
|
||
assert!(!'\u{0}'.is_whitespace());
|
||
}
|
||
|
||
#[test]
|
||
fn test_to_digit() {
|
||
assert_eq!('0'.to_digit(10), Some(0));
|
||
assert_eq!('1'.to_digit(2), Some(1));
|
||
assert_eq!('2'.to_digit(3), Some(2));
|
||
assert_eq!('9'.to_digit(10), Some(9));
|
||
assert_eq!('a'.to_digit(16), Some(10));
|
||
assert_eq!('A'.to_digit(16), Some(10));
|
||
assert_eq!('b'.to_digit(16), Some(11));
|
||
assert_eq!('B'.to_digit(16), Some(11));
|
||
assert_eq!('A'.to_digit(36), Some(10));
|
||
assert_eq!('z'.to_digit(36), Some(35));
|
||
assert_eq!('Z'.to_digit(36), Some(35));
|
||
assert_eq!('['.to_digit(36), None);
|
||
assert_eq!('`'.to_digit(36), None);
|
||
assert_eq!('{'.to_digit(36), None);
|
||
assert_eq!('$'.to_digit(36), None);
|
||
assert_eq!('@'.to_digit(16), None);
|
||
assert_eq!('G'.to_digit(16), None);
|
||
assert_eq!('g'.to_digit(16), None);
|
||
assert_eq!(' '.to_digit(10), None);
|
||
assert_eq!('/'.to_digit(10), None);
|
||
assert_eq!(':'.to_digit(10), None);
|
||
assert_eq!(':'.to_digit(11), None);
|
||
}
|
||
|
||
#[test]
|
||
fn test_to_lowercase() {
|
||
fn lower(c: char) -> String {
|
||
let to_lowercase = c.to_lowercase();
|
||
assert_eq!(to_lowercase.len(), to_lowercase.count());
|
||
let iter: String = c.to_lowercase().collect();
|
||
let disp: String = c.to_lowercase().to_string();
|
||
assert_eq!(iter, disp);
|
||
let iter_rev: String = c.to_lowercase().rev().collect();
|
||
let disp_rev: String = disp.chars().rev().collect();
|
||
assert_eq!(iter_rev, disp_rev);
|
||
iter
|
||
}
|
||
assert_eq!(lower('A'), "a");
|
||
assert_eq!(lower('Ö'), "ö");
|
||
assert_eq!(lower('ß'), "ß");
|
||
assert_eq!(lower('Ü'), "ü");
|
||
assert_eq!(lower('💩'), "💩");
|
||
assert_eq!(lower('Σ'), "σ");
|
||
assert_eq!(lower('Τ'), "τ");
|
||
assert_eq!(lower('Ι'), "ι");
|
||
assert_eq!(lower('Γ'), "γ");
|
||
assert_eq!(lower('Μ'), "μ");
|
||
assert_eq!(lower('Α'), "α");
|
||
assert_eq!(lower('Σ'), "σ");
|
||
assert_eq!(lower('Dž'), "dž");
|
||
assert_eq!(lower('fi'), "fi");
|
||
assert_eq!(lower('İ'), "i\u{307}");
|
||
}
|
||
|
||
#[test]
|
||
fn test_to_uppercase() {
|
||
fn upper(c: char) -> String {
|
||
let to_uppercase = c.to_uppercase();
|
||
assert_eq!(to_uppercase.len(), to_uppercase.count());
|
||
let iter: String = c.to_uppercase().collect();
|
||
let disp: String = c.to_uppercase().to_string();
|
||
assert_eq!(iter, disp);
|
||
let iter_rev: String = c.to_uppercase().rev().collect();
|
||
let disp_rev: String = disp.chars().rev().collect();
|
||
assert_eq!(iter_rev, disp_rev);
|
||
iter
|
||
}
|
||
assert_eq!(upper('a'), "A");
|
||
assert_eq!(upper('ö'), "Ö");
|
||
assert_eq!(upper('ß'), "SS"); // not ẞ: Latin capital letter sharp s
|
||
assert_eq!(upper('ü'), "Ü");
|
||
assert_eq!(upper('💩'), "💩");
|
||
|
||
assert_eq!(upper('σ'), "Σ");
|
||
assert_eq!(upper('τ'), "Τ");
|
||
assert_eq!(upper('ι'), "Ι");
|
||
assert_eq!(upper('γ'), "Γ");
|
||
assert_eq!(upper('μ'), "Μ");
|
||
assert_eq!(upper('α'), "Α");
|
||
assert_eq!(upper('ς'), "Σ");
|
||
assert_eq!(upper('Dž'), "DŽ");
|
||
assert_eq!(upper('fi'), "FI");
|
||
assert_eq!(upper('ᾀ'), "ἈΙ");
|
||
}
|
||
|
||
#[test]
|
||
fn test_is_control() {
|
||
assert!('\u{0}'.is_control());
|
||
assert!('\u{3}'.is_control());
|
||
assert!('\u{6}'.is_control());
|
||
assert!('\u{9}'.is_control());
|
||
assert!('\u{7f}'.is_control());
|
||
assert!('\u{92}'.is_control());
|
||
assert!(!'\u{20}'.is_control());
|
||
assert!(!'\u{55}'.is_control());
|
||
assert!(!'\u{68}'.is_control());
|
||
}
|
||
|
||
#[test]
|
||
fn test_is_numeric() {
|
||
assert!('2'.is_numeric());
|
||
assert!('7'.is_numeric());
|
||
assert!('¾'.is_numeric());
|
||
assert!(!'c'.is_numeric());
|
||
assert!(!'i'.is_numeric());
|
||
assert!(!'z'.is_numeric());
|
||
assert!(!'Q'.is_numeric());
|
||
}
|
||
|
||
#[test]
|
||
fn test_escape_debug() {
|
||
fn string(c: char) -> String {
|
||
let iter: String = c.escape_debug().collect();
|
||
let disp: String = c.escape_debug().to_string();
|
||
assert_eq!(iter, disp);
|
||
iter
|
||
}
|
||
assert_eq!(string('\n'), "\\n");
|
||
assert_eq!(string('\r'), "\\r");
|
||
assert_eq!(string('\''), "\\'");
|
||
assert_eq!(string('"'), "\\\"");
|
||
assert_eq!(string(' '), " ");
|
||
assert_eq!(string('a'), "a");
|
||
assert_eq!(string('~'), "~");
|
||
assert_eq!(string('é'), "é");
|
||
assert_eq!(string('文'), "文");
|
||
assert_eq!(string('\x00'), "\\0");
|
||
assert_eq!(string('\x1f'), "\\u{1f}");
|
||
assert_eq!(string('\x7f'), "\\u{7f}");
|
||
assert_eq!(string('\u{80}'), "\\u{80}");
|
||
assert_eq!(string('\u{ff}'), "\u{ff}");
|
||
assert_eq!(string('\u{11b}'), "\u{11b}");
|
||
assert_eq!(string('\u{1d4b6}'), "\u{1d4b6}");
|
||
assert_eq!(string('\u{301}'), "\\u{301}"); // combining character
|
||
assert_eq!(string('\u{200b}'), "\\u{200b}"); // zero width space
|
||
assert_eq!(string('\u{e000}'), "\\u{e000}"); // private use 1
|
||
assert_eq!(string('\u{100000}'), "\\u{100000}"); // private use 2
|
||
}
|
||
|
||
#[test]
|
||
fn test_escape_default() {
|
||
fn string(c: char) -> String {
|
||
let iter: String = c.escape_default().collect();
|
||
let disp: String = c.escape_default().to_string();
|
||
assert_eq!(iter, disp);
|
||
iter
|
||
}
|
||
assert_eq!(string('\n'), "\\n");
|
||
assert_eq!(string('\r'), "\\r");
|
||
assert_eq!(string('\''), "\\'");
|
||
assert_eq!(string('"'), "\\\"");
|
||
assert_eq!(string(' '), " ");
|
||
assert_eq!(string('a'), "a");
|
||
assert_eq!(string('~'), "~");
|
||
assert_eq!(string('é'), "\\u{e9}");
|
||
assert_eq!(string('\x00'), "\\u{0}");
|
||
assert_eq!(string('\x1f'), "\\u{1f}");
|
||
assert_eq!(string('\x7f'), "\\u{7f}");
|
||
assert_eq!(string('\u{80}'), "\\u{80}");
|
||
assert_eq!(string('\u{ff}'), "\\u{ff}");
|
||
assert_eq!(string('\u{11b}'), "\\u{11b}");
|
||
assert_eq!(string('\u{1d4b6}'), "\\u{1d4b6}");
|
||
assert_eq!(string('\u{200b}'), "\\u{200b}"); // zero width space
|
||
assert_eq!(string('\u{e000}'), "\\u{e000}"); // private use 1
|
||
assert_eq!(string('\u{100000}'), "\\u{100000}"); // private use 2
|
||
}
|
||
|
||
#[test]
|
||
fn test_escape_unicode() {
|
||
fn string(c: char) -> String {
|
||
let iter: String = c.escape_unicode().collect();
|
||
let disp: String = c.escape_unicode().to_string();
|
||
assert_eq!(iter, disp);
|
||
iter
|
||
}
|
||
|
||
assert_eq!(string('\x00'), "\\u{0}");
|
||
assert_eq!(string('\n'), "\\u{a}");
|
||
assert_eq!(string(' '), "\\u{20}");
|
||
assert_eq!(string('a'), "\\u{61}");
|
||
assert_eq!(string('\u{11b}'), "\\u{11b}");
|
||
assert_eq!(string('\u{1d4b6}'), "\\u{1d4b6}");
|
||
}
|
||
|
||
#[test]
|
||
fn test_encode_utf8() {
|
||
fn check(input: char, expect: &[u8]) {
|
||
let mut buf = [0; 4];
|
||
let ptr = buf.as_ptr();
|
||
let s = input.encode_utf8(&mut buf);
|
||
assert_eq!(s.as_ptr() as usize, ptr as usize);
|
||
assert!(str::from_utf8(s.as_bytes()).is_ok());
|
||
assert_eq!(s.as_bytes(), expect);
|
||
}
|
||
|
||
check('x', &[0x78]);
|
||
check('\u{e9}', &[0xc3, 0xa9]);
|
||
check('\u{a66e}', &[0xea, 0x99, 0xae]);
|
||
check('\u{1f4a9}', &[0xf0, 0x9f, 0x92, 0xa9]);
|
||
}
|
||
|
||
#[test]
|
||
fn test_encode_utf16() {
|
||
fn check(input: char, expect: &[u16]) {
|
||
let mut buf = [0; 2];
|
||
let ptr = buf.as_mut_ptr();
|
||
let b = input.encode_utf16(&mut buf);
|
||
assert_eq!(b.as_mut_ptr() as usize, ptr as usize);
|
||
assert_eq!(b, expect);
|
||
}
|
||
|
||
check('x', &[0x0078]);
|
||
check('\u{e9}', &[0x00e9]);
|
||
check('\u{a66e}', &[0xa66e]);
|
||
check('\u{1f4a9}', &[0xd83d, 0xdca9]);
|
||
}
|
||
|
||
#[test]
|
||
fn test_len_utf16() {
|
||
assert!('x'.len_utf16() == 1);
|
||
assert!('\u{e9}'.len_utf16() == 1);
|
||
assert!('\u{a66e}'.len_utf16() == 1);
|
||
assert!('\u{1f4a9}'.len_utf16() == 2);
|
||
}
|
||
|
||
#[test]
|
||
fn test_decode_utf16() {
|
||
fn check(s: &[u16], expected: &[Result<char, u16>]) {
|
||
let v = char::decode_utf16(s.iter().cloned())
|
||
.map(|r| r.map_err(|e| e.unpaired_surrogate()))
|
||
.collect::<Vec<_>>();
|
||
assert_eq!(v, expected);
|
||
}
|
||
check(&[0xD800, 0x41, 0x42], &[Err(0xD800), Ok('A'), Ok('B')]);
|
||
check(&[0xD800, 0], &[Err(0xD800), Ok('\0')]);
|
||
check(&[0xD800], &[Err(0xD800)]);
|
||
check(&[0xD840, 0xDC00], &[Ok('\u{20000}')]);
|
||
check(&[0xD840, 0xD840, 0xDC00], &[Err(0xD840), Ok('\u{20000}')]);
|
||
check(&[0xDC00, 0xD840], &[Err(0xDC00), Err(0xD840)]);
|
||
}
|
||
|
||
#[test]
|
||
fn test_decode_utf16_size_hint() {
|
||
fn check(s: &[u16]) {
|
||
let mut iter = char::decode_utf16(s.iter().cloned());
|
||
|
||
loop {
|
||
let count = iter.clone().count();
|
||
let (lower, upper) = iter.size_hint();
|
||
|
||
assert!(
|
||
lower <= count && count <= upper.unwrap(),
|
||
"lower = {lower}, count = {count}, upper = {upper:?}"
|
||
);
|
||
|
||
if let None = iter.next() {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
check(&[0xD800, 0xD800, 0xDC00]);
|
||
check(&[0xD800, 0xD800, 0x0]);
|
||
check(&[0xD800, 0x41, 0x42]);
|
||
check(&[0xD800, 0]);
|
||
check(&[0xD834, 0x006d]);
|
||
}
|
||
|
||
#[test]
|
||
fn ed_iterator_specializations() {
|
||
// Check counting
|
||
assert_eq!('\n'.escape_default().count(), 2);
|
||
assert_eq!('c'.escape_default().count(), 1);
|
||
assert_eq!(' '.escape_default().count(), 1);
|
||
assert_eq!('\\'.escape_default().count(), 2);
|
||
assert_eq!('\''.escape_default().count(), 2);
|
||
|
||
// Check nth
|
||
|
||
// Check that OoB is handled correctly
|
||
assert_eq!('\n'.escape_default().nth(2), None);
|
||
assert_eq!('c'.escape_default().nth(1), None);
|
||
assert_eq!(' '.escape_default().nth(1), None);
|
||
assert_eq!('\\'.escape_default().nth(2), None);
|
||
assert_eq!('\''.escape_default().nth(2), None);
|
||
|
||
// Check the first char
|
||
assert_eq!('\n'.escape_default().nth(0), Some('\\'));
|
||
assert_eq!('c'.escape_default().nth(0), Some('c'));
|
||
assert_eq!(' '.escape_default().nth(0), Some(' '));
|
||
assert_eq!('\\'.escape_default().nth(0), Some('\\'));
|
||
assert_eq!('\''.escape_default().nth(0), Some('\\'));
|
||
|
||
// Check the second char
|
||
assert_eq!('\n'.escape_default().nth(1), Some('n'));
|
||
assert_eq!('\\'.escape_default().nth(1), Some('\\'));
|
||
assert_eq!('\''.escape_default().nth(1), Some('\''));
|
||
|
||
// Check the last char
|
||
assert_eq!('\n'.escape_default().last(), Some('n'));
|
||
assert_eq!('c'.escape_default().last(), Some('c'));
|
||
assert_eq!(' '.escape_default().last(), Some(' '));
|
||
assert_eq!('\\'.escape_default().last(), Some('\\'));
|
||
assert_eq!('\''.escape_default().last(), Some('\''));
|
||
}
|
||
|
||
#[test]
|
||
fn eu_iterator_specializations() {
|
||
fn check(c: char) {
|
||
let len = c.escape_unicode().count();
|
||
|
||
// Check OoB
|
||
assert_eq!(c.escape_unicode().nth(len), None);
|
||
|
||
// For all possible in-bound offsets
|
||
let mut iter = c.escape_unicode();
|
||
for offset in 0..len {
|
||
// Check last
|
||
assert_eq!(iter.clone().last(), Some('}'));
|
||
|
||
// Check len
|
||
assert_eq!(iter.len(), len - offset);
|
||
|
||
// Check size_hint (= len in ExactSizeIterator)
|
||
assert_eq!(iter.size_hint(), (iter.len(), Some(iter.len())));
|
||
|
||
// Check counting
|
||
assert_eq!(iter.clone().count(), len - offset);
|
||
|
||
// Check nth
|
||
assert_eq!(c.escape_unicode().nth(offset), iter.next());
|
||
}
|
||
|
||
// Check post-last
|
||
assert_eq!(iter.clone().last(), None);
|
||
assert_eq!(iter.clone().count(), 0);
|
||
}
|
||
|
||
check('\u{0}');
|
||
check('\u{1}');
|
||
check('\u{12}');
|
||
check('\u{123}');
|
||
check('\u{1234}');
|
||
check('\u{12340}');
|
||
check('\u{10FFFF}');
|
||
}
|