| use std::convert::TryFrom; |
| use std::str::FromStr; |
| use std::{char, str}; |
| |
| #[test] |
| fn test_convert() { |
| assert_eq!(u32::from('a'), 0x61); |
| 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] |
| 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!('z'.to_digit(36), Some(35)); |
| assert_eq!('Z'.to_digit(36), Some(35)); |
| assert_eq!(' '.to_digit(10), None); |
| assert_eq!('$'.to_digit(36), 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); |
| 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); |
| 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'), "\\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{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')]); |
| } |
| |
| #[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}'); |
| } |
