use super::*; use crate::borrow::Cow; #[test] fn code_point_from_u32() { assert!(CodePoint::from_u32(0).is_some()); assert!(CodePoint::from_u32(0xD800).is_some()); assert!(CodePoint::from_u32(0x10FFFF).is_some()); assert!(CodePoint::from_u32(0x110000).is_none()); } #[test] fn code_point_to_u32() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } assert_eq!(c(0).to_u32(), 0); assert_eq!(c(0xD800).to_u32(), 0xD800); assert_eq!(c(0x10FFFF).to_u32(), 0x10FFFF); } #[test] fn code_point_to_lead_surrogate() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } assert_eq!(c(0).to_lead_surrogate(), None); assert_eq!(c(0xE9).to_lead_surrogate(), None); assert_eq!(c(0xD800).to_lead_surrogate(), Some(0xD800)); assert_eq!(c(0xDBFF).to_lead_surrogate(), Some(0xDBFF)); assert_eq!(c(0xDC00).to_lead_surrogate(), None); assert_eq!(c(0xDFFF).to_lead_surrogate(), None); assert_eq!(c(0x1F4A9).to_lead_surrogate(), None); assert_eq!(c(0x10FFFF).to_lead_surrogate(), None); } #[test] fn code_point_to_trail_surrogate() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } assert_eq!(c(0).to_trail_surrogate(), None); assert_eq!(c(0xE9).to_trail_surrogate(), None); assert_eq!(c(0xD800).to_trail_surrogate(), None); assert_eq!(c(0xDBFF).to_trail_surrogate(), None); assert_eq!(c(0xDC00).to_trail_surrogate(), Some(0xDC00)); assert_eq!(c(0xDFFF).to_trail_surrogate(), Some(0xDFFF)); assert_eq!(c(0x1F4A9).to_trail_surrogate(), None); assert_eq!(c(0x10FFFF).to_trail_surrogate(), None); } #[test] fn code_point_from_char() { assert_eq!(CodePoint::from_char('a').to_u32(), 0x61); assert_eq!(CodePoint::from_char('💩').to_u32(), 0x1F4A9); } #[test] fn code_point_to_string() { assert_eq!(format!("{:?}", CodePoint::from_char('a')), "U+0061"); assert_eq!(format!("{:?}", CodePoint::from_char('💩')), "U+1F4A9"); } #[test] fn code_point_to_char() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } assert_eq!(c(0x61).to_char(), Some('a')); assert_eq!(c(0x1F4A9).to_char(), Some('💩')); assert_eq!(c(0xD800).to_char(), None); } #[test] fn code_point_to_char_lossy() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } assert_eq!(c(0x61).to_char_lossy(), 'a'); assert_eq!(c(0x1F4A9).to_char_lossy(), '💩'); assert_eq!(c(0xD800).to_char_lossy(), '\u{FFFD}'); } #[test] fn wtf8buf_new() { assert_eq!(Wtf8Buf::new().bytes, b""); } #[test] fn wtf8buf_from_str() { assert_eq!(Wtf8Buf::from_str("").bytes, b""); assert_eq!(Wtf8Buf::from_str("aé 💩").bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); } #[test] fn wtf8buf_from_string() { assert_eq!(Wtf8Buf::from_string(String::from("")).bytes, b""); assert_eq!(Wtf8Buf::from_string(String::from("aé 💩")).bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); } #[test] fn wtf8buf_from_wide() { let buf = Wtf8Buf::from_wide(&[]); assert_eq!(buf.bytes, b""); assert!(buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0x61, 0xE9, 0x20, 0xD83D, 0xDCA9]); assert_eq!(buf.bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); assert!(buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0x61, 0xE9, 0x20, 0xD83D, 0xD83D, 0xDCA9]); assert_eq!(buf.bytes, b"a\xC3\xA9 \xED\xA0\xBD\xF0\x9F\x92\xA9"); assert!(!buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0xD800]); assert_eq!(buf.bytes, b"\xED\xA0\x80"); assert!(!buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0xDBFF]); assert_eq!(buf.bytes, b"\xED\xAF\xBF"); assert!(!buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0xDC00]); assert_eq!(buf.bytes, b"\xED\xB0\x80"); assert!(!buf.is_known_utf8); let buf = Wtf8Buf::from_wide(&[0xDFFF]); assert_eq!(buf.bytes, b"\xED\xBF\xBF"); assert!(!buf.is_known_utf8); } #[test] fn wtf8buf_push_str() { let mut string = Wtf8Buf::new(); assert_eq!(string.bytes, b""); assert!(string.is_known_utf8); string.push_str("aé 💩"); assert_eq!(string.bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); assert!(string.is_known_utf8); } #[test] fn wtf8buf_push_char() { let mut string = Wtf8Buf::from_str("aé "); assert_eq!(string.bytes, b"a\xC3\xA9 "); assert!(string.is_known_utf8); string.push_char('💩'); assert_eq!(string.bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); assert!(string.is_known_utf8); } #[test] fn wtf8buf_push() { let mut string = Wtf8Buf::from_str("aé "); assert_eq!(string.bytes, b"a\xC3\xA9 "); assert!(string.is_known_utf8); string.push(CodePoint::from_char('💩')); assert_eq!(string.bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); assert!(string.is_known_utf8); fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } let mut string = Wtf8Buf::new(); string.push(c(0xD83D)); // lead assert!(!string.is_known_utf8); string.push(c(0xDCA9)); // trail assert_eq!(string.bytes, b"\xF0\x9F\x92\xA9"); // Magic! let mut string = Wtf8Buf::new(); string.push(c(0xD83D)); // lead assert!(!string.is_known_utf8); string.push(c(0x20)); // not surrogate string.push(c(0xDCA9)); // trail assert_eq!(string.bytes, b"\xED\xA0\xBD \xED\xB2\xA9"); let mut string = Wtf8Buf::new(); string.push(c(0xD800)); // lead assert!(!string.is_known_utf8); string.push(c(0xDBFF)); // lead assert_eq!(string.bytes, b"\xED\xA0\x80\xED\xAF\xBF"); let mut string = Wtf8Buf::new(); string.push(c(0xD800)); // lead assert!(!string.is_known_utf8); string.push(c(0xE000)); // not surrogate assert_eq!(string.bytes, b"\xED\xA0\x80\xEE\x80\x80"); let mut string = Wtf8Buf::new(); string.push(c(0xD7FF)); // not surrogate assert!(string.is_known_utf8); string.push(c(0xDC00)); // trail assert!(!string.is_known_utf8); assert_eq!(string.bytes, b"\xED\x9F\xBF\xED\xB0\x80"); let mut string = Wtf8Buf::new(); string.push(c(0x61)); // not surrogate, < 3 bytes assert!(string.is_known_utf8); string.push(c(0xDC00)); // trail assert!(!string.is_known_utf8); assert_eq!(string.bytes, b"\x61\xED\xB0\x80"); let mut string = Wtf8Buf::new(); string.push(c(0xDC00)); // trail assert!(!string.is_known_utf8); assert_eq!(string.bytes, b"\xED\xB0\x80"); } #[test] fn wtf8buf_push_wtf8() { let mut string = Wtf8Buf::from_str("aé"); assert_eq!(string.bytes, b"a\xC3\xA9"); string.push_wtf8(Wtf8::from_str(" 💩")); assert_eq!(string.bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); assert!(string.is_known_utf8); fn w(v: &[u8]) -> &Wtf8 { unsafe { Wtf8::from_bytes_unchecked(v) } } let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\xA0\xBD")); // lead string.push_wtf8(w(b"\xED\xB2\xA9")); // trail assert_eq!(string.bytes, b"\xF0\x9F\x92\xA9"); // Magic! let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\xA0\xBD")); // lead string.push_wtf8(w(b" ")); // not surrogate string.push_wtf8(w(b"\xED\xB2\xA9")); // trail assert_eq!(string.bytes, b"\xED\xA0\xBD \xED\xB2\xA9"); assert!(!string.is_known_utf8); let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\xA0\x80")); // lead string.push_wtf8(w(b"\xED\xAF\xBF")); // lead assert_eq!(string.bytes, b"\xED\xA0\x80\xED\xAF\xBF"); assert!(!string.is_known_utf8); let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\xA0\x80")); // lead string.push_wtf8(w(b"\xEE\x80\x80")); // not surrogate assert_eq!(string.bytes, b"\xED\xA0\x80\xEE\x80\x80"); assert!(!string.is_known_utf8); let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\x9F\xBF")); // not surrogate string.push_wtf8(w(b"\xED\xB0\x80")); // trail assert_eq!(string.bytes, b"\xED\x9F\xBF\xED\xB0\x80"); assert!(!string.is_known_utf8); let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"a")); // not surrogate, < 3 bytes string.push_wtf8(w(b"\xED\xB0\x80")); // trail assert_eq!(string.bytes, b"\x61\xED\xB0\x80"); assert!(!string.is_known_utf8); let mut string = Wtf8Buf::new(); string.push_wtf8(w(b"\xED\xB0\x80")); // trail assert_eq!(string.bytes, b"\xED\xB0\x80"); assert!(!string.is_known_utf8); } #[test] fn wtf8buf_truncate() { let mut string = Wtf8Buf::from_str("aé"); assert!(string.is_known_utf8); string.truncate(3); assert_eq!(string.bytes, b"a\xC3\xA9"); assert!(string.is_known_utf8); string.truncate(1); assert_eq!(string.bytes, b"a"); assert!(string.is_known_utf8); string.truncate(0); assert_eq!(string.bytes, b""); assert!(string.is_known_utf8); } #[test] fn wtf8buf_truncate_around_non_bmp() { let mut string = Wtf8Buf::from_str("💩"); assert!(string.is_known_utf8); string.truncate(4); assert_eq!(string.bytes, b"\xF0\x9F\x92\xA9"); assert!(string.is_known_utf8); string.truncate(0); assert_eq!(string.bytes, b""); assert!(string.is_known_utf8); } #[test] #[should_panic] fn wtf8buf_truncate_fail_code_point_boundary() { let mut string = Wtf8Buf::from_str("aé"); string.truncate(2); } #[test] #[should_panic] fn wtf8buf_truncate_fail_longer() { let mut string = Wtf8Buf::from_str("aé"); string.truncate(4); } #[test] #[should_panic] fn wtf8buf_truncate_splitting_non_bmp3() { let mut string = Wtf8Buf::from_str("💩"); assert!(string.is_known_utf8); string.truncate(3); } #[test] #[should_panic] fn wtf8buf_truncate_splitting_non_bmp2() { let mut string = Wtf8Buf::from_str("💩"); assert!(string.is_known_utf8); string.truncate(2); } #[test] #[should_panic] fn wtf8buf_truncate_splitting_non_bmp1() { let mut string = Wtf8Buf::from_str("💩"); assert!(string.is_known_utf8); string.truncate(1); } #[test] fn wtf8buf_into_string() { let mut string = Wtf8Buf::from_str("aé 💩"); assert!(string.is_known_utf8); assert_eq!(string.clone().into_string(), Ok(String::from("aé 💩"))); string.push(CodePoint::from_u32(0xD800).unwrap()); assert!(!string.is_known_utf8); assert_eq!(string.clone().into_string(), Err(string)); } #[test] fn wtf8buf_into_string_lossy() { let mut string = Wtf8Buf::from_str("aé 💩"); assert_eq!(string.clone().into_string_lossy(), String::from("aé 💩")); string.push(CodePoint::from_u32(0xD800).unwrap()); assert_eq!(string.clone().into_string_lossy(), String::from("aé 💩�")); } #[test] fn wtf8buf_from_iterator() { fn f(values: &[u32]) -> Wtf8Buf { values.iter().map(|&c| CodePoint::from_u32(c).unwrap()).collect::() } assert_eq!( f(&[0x61, 0xE9, 0x20, 0x1F4A9]), Wtf8Buf { bytes: b"a\xC3\xA9 \xF0\x9F\x92\xA9".to_vec(), is_known_utf8: true } ); assert_eq!(f(&[0xD83D, 0xDCA9]).bytes, b"\xF0\x9F\x92\xA9"); // Magic! assert_eq!( f(&[0xD83D, 0x20, 0xDCA9]), Wtf8Buf { bytes: b"\xED\xA0\xBD \xED\xB2\xA9".to_vec(), is_known_utf8: false } ); assert_eq!( f(&[0xD800, 0xDBFF]), Wtf8Buf { bytes: b"\xED\xA0\x80\xED\xAF\xBF".to_vec(), is_known_utf8: false } ); assert_eq!( f(&[0xD800, 0xE000]), Wtf8Buf { bytes: b"\xED\xA0\x80\xEE\x80\x80".to_vec(), is_known_utf8: false } ); assert_eq!( f(&[0xD7FF, 0xDC00]), Wtf8Buf { bytes: b"\xED\x9F\xBF\xED\xB0\x80".to_vec(), is_known_utf8: false } ); assert_eq!( f(&[0x61, 0xDC00]), Wtf8Buf { bytes: b"\x61\xED\xB0\x80".to_vec(), is_known_utf8: false } ); assert_eq!(f(&[0xDC00]), Wtf8Buf { bytes: b"\xED\xB0\x80".to_vec(), is_known_utf8: false }); } #[test] fn wtf8buf_extend() { fn e(initial: &[u32], extended: &[u32]) -> Wtf8Buf { fn c(value: &u32) -> CodePoint { CodePoint::from_u32(*value).unwrap() } let mut string = initial.iter().map(c).collect::(); string.extend(extended.iter().map(c)); string } assert_eq!( e(&[0x61, 0xE9], &[0x20, 0x1F4A9]), Wtf8Buf { bytes: b"a\xC3\xA9 \xF0\x9F\x92\xA9".to_vec(), is_known_utf8: true } ); assert_eq!(e(&[0xD83D], &[0xDCA9]).bytes, b"\xF0\x9F\x92\xA9"); // Magic! assert_eq!( e(&[0xD83D, 0x20], &[0xDCA9]), Wtf8Buf { bytes: b"\xED\xA0\xBD \xED\xB2\xA9".to_vec(), is_known_utf8: false } ); assert_eq!( e(&[0xD800], &[0xDBFF]), Wtf8Buf { bytes: b"\xED\xA0\x80\xED\xAF\xBF".to_vec(), is_known_utf8: false } ); assert_eq!( e(&[0xD800], &[0xE000]), Wtf8Buf { bytes: b"\xED\xA0\x80\xEE\x80\x80".to_vec(), is_known_utf8: false } ); assert_eq!( e(&[0xD7FF], &[0xDC00]), Wtf8Buf { bytes: b"\xED\x9F\xBF\xED\xB0\x80".to_vec(), is_known_utf8: false } ); assert_eq!( e(&[0x61], &[0xDC00]), Wtf8Buf { bytes: b"\x61\xED\xB0\x80".to_vec(), is_known_utf8: false } ); assert_eq!( e(&[], &[0xDC00]), Wtf8Buf { bytes: b"\xED\xB0\x80".to_vec(), is_known_utf8: false } ); } #[test] fn wtf8buf_show() { let mut string = Wtf8Buf::from_str("a\té \u{7f}💩\r"); string.push(CodePoint::from_u32(0xD800).unwrap()); assert_eq!(format!("{string:?}"), "\"a\\té \\u{7f}\u{1f4a9}\\r\\u{d800}\""); } #[test] fn wtf8buf_as_slice() { assert_eq!(Wtf8Buf::from_str("aé").as_slice(), Wtf8::from_str("aé")); } #[test] fn wtf8buf_show_str() { let text = "a\té 💩\r"; let string = Wtf8Buf::from_str(text); assert_eq!(format!("{text:?}"), format!("{string:?}")); } #[test] fn wtf8_from_str() { assert_eq!(&Wtf8::from_str("").bytes, b""); assert_eq!(&Wtf8::from_str("aé 💩").bytes, b"a\xC3\xA9 \xF0\x9F\x92\xA9"); } #[test] fn wtf8_len() { assert_eq!(Wtf8::from_str("").len(), 0); assert_eq!(Wtf8::from_str("aé 💩").len(), 8); } #[test] fn wtf8_slice() { assert_eq!(&Wtf8::from_str("aé 💩")[1..4].bytes, b"\xC3\xA9 "); } #[test] #[should_panic] fn wtf8_slice_not_code_point_boundary() { let _ = &Wtf8::from_str("aé 💩")[2..4]; } #[test] fn wtf8_slice_from() { assert_eq!(&Wtf8::from_str("aé 💩")[1..].bytes, b"\xC3\xA9 \xF0\x9F\x92\xA9"); } #[test] #[should_panic] fn wtf8_slice_from_not_code_point_boundary() { let _ = &Wtf8::from_str("aé 💩")[2..]; } #[test] fn wtf8_slice_to() { assert_eq!(&Wtf8::from_str("aé 💩")[..4].bytes, b"a\xC3\xA9 "); } #[test] #[should_panic] fn wtf8_slice_to_not_code_point_boundary() { let _ = &Wtf8::from_str("aé 💩")[5..]; } #[test] fn wtf8_ascii_byte_at() { let slice = Wtf8::from_str("aé 💩"); assert_eq!(slice.ascii_byte_at(0), b'a'); assert_eq!(slice.ascii_byte_at(1), b'\xFF'); assert_eq!(slice.ascii_byte_at(2), b'\xFF'); assert_eq!(slice.ascii_byte_at(3), b' '); assert_eq!(slice.ascii_byte_at(4), b'\xFF'); } #[test] fn wtf8_code_points() { fn c(value: u32) -> CodePoint { CodePoint::from_u32(value).unwrap() } fn cp(string: &Wtf8Buf) -> Vec> { string.code_points().map(|c| c.to_char()).collect::>() } let mut string = Wtf8Buf::from_str("é "); assert_eq!(cp(&string), [Some('é'), Some(' ')]); string.push(c(0xD83D)); assert_eq!(cp(&string), [Some('é'), Some(' '), None]); string.push(c(0xDCA9)); assert_eq!(cp(&string), [Some('é'), Some(' '), Some('💩')]); } #[test] fn wtf8_as_str() { assert_eq!(Wtf8::from_str("").as_str(), Ok("")); assert_eq!(Wtf8::from_str("aé 💩").as_str(), Ok("aé 💩")); let mut string = Wtf8Buf::new(); string.push(CodePoint::from_u32(0xD800).unwrap()); assert!(string.as_str().is_err()); } #[test] fn wtf8_to_string_lossy() { assert_eq!(Wtf8::from_str("").to_string_lossy(), Cow::Borrowed("")); assert_eq!(Wtf8::from_str("aé 💩").to_string_lossy(), Cow::Borrowed("aé 💩")); let mut string = Wtf8Buf::from_str("aé 💩"); string.push(CodePoint::from_u32(0xD800).unwrap()); let expected: Cow<'_, str> = Cow::Owned(String::from("aé 💩�")); assert_eq!(string.to_string_lossy(), expected); } #[test] fn wtf8_display() { fn d(b: &[u8]) -> String { (&unsafe { Wtf8::from_bytes_unchecked(b) }).to_string() } assert_eq!("", d("".as_bytes())); assert_eq!("aé 💩", d("aé 💩".as_bytes())); let mut string = Wtf8Buf::from_str("aé 💩"); string.push(CodePoint::from_u32(0xD800).unwrap()); assert_eq!("aé 💩�", d(string.as_inner())); } #[test] fn wtf8_encode_wide() { let mut string = Wtf8Buf::from_str("aé "); string.push(CodePoint::from_u32(0xD83D).unwrap()); string.push_char('💩'); assert_eq!( string.encode_wide().collect::>(), vec![0x61, 0xE9, 0x20, 0xD83D, 0xD83D, 0xDCA9] ); } #[test] fn wtf8_encode_wide_size_hint() { let string = Wtf8Buf::from_str("\u{12345}"); let mut iter = string.encode_wide(); assert_eq!((1, Some(8)), iter.size_hint()); iter.next().unwrap(); assert_eq!((1, Some(1)), iter.size_hint()); iter.next().unwrap(); assert_eq!((0, Some(0)), iter.size_hint()); assert!(iter.next().is_none()); } #[test] fn wtf8_clone_into() { let mut string = Wtf8Buf::new(); Wtf8::from_str("green").clone_into(&mut string); assert_eq!(string.bytes, b"green"); let mut string = Wtf8Buf::from_str("green"); Wtf8::from_str("").clone_into(&mut string); assert_eq!(string.bytes, b""); let mut string = Wtf8Buf::from_str("red"); Wtf8::from_str("green").clone_into(&mut string); assert_eq!(string.bytes, b"green"); let mut string = Wtf8Buf::from_str("green"); Wtf8::from_str("red").clone_into(&mut string); assert_eq!(string.bytes, b"red"); let mut string = Wtf8Buf::from_str("green"); assert!(string.is_known_utf8); unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").clone_into(&mut string) }; assert_eq!(string.bytes, b"\xED\xA0\x80"); assert!(!string.is_known_utf8); } #[test] fn wtf8_to_ascii_lowercase() { let lowercase = Wtf8::from_str("").to_ascii_lowercase(); assert_eq!(lowercase.bytes, b""); let lowercase = Wtf8::from_str("GrEeN gRaPeS! 🍇").to_ascii_lowercase(); assert_eq!(lowercase.bytes, b"green grapes! \xf0\x9f\x8d\x87"); let lowercase = unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").to_ascii_lowercase() }; assert_eq!(lowercase.bytes, b"\xED\xA0\x80"); assert!(!lowercase.is_known_utf8); } #[test] fn wtf8_to_ascii_uppercase() { let uppercase = Wtf8::from_str("").to_ascii_uppercase(); assert_eq!(uppercase.bytes, b""); let uppercase = Wtf8::from_str("GrEeN gRaPeS! 🍇").to_ascii_uppercase(); assert_eq!(uppercase.bytes, b"GREEN GRAPES! \xf0\x9f\x8d\x87"); let uppercase = unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").to_ascii_uppercase() }; assert_eq!(uppercase.bytes, b"\xED\xA0\x80"); assert!(!uppercase.is_known_utf8); } #[test] fn wtf8_make_ascii_lowercase() { let mut lowercase = Wtf8Buf::from_str(""); lowercase.make_ascii_lowercase(); assert_eq!(lowercase.bytes, b""); let mut lowercase = Wtf8Buf::from_str("GrEeN gRaPeS! 🍇"); lowercase.make_ascii_lowercase(); assert_eq!(lowercase.bytes, b"green grapes! \xf0\x9f\x8d\x87"); let mut lowercase = unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").to_owned() }; lowercase.make_ascii_lowercase(); assert_eq!(lowercase.bytes, b"\xED\xA0\x80"); assert!(!lowercase.is_known_utf8); } #[test] fn wtf8_make_ascii_uppercase() { let mut uppercase = Wtf8Buf::from_str(""); uppercase.make_ascii_uppercase(); assert_eq!(uppercase.bytes, b""); let mut uppercase = Wtf8Buf::from_str("GrEeN gRaPeS! 🍇"); uppercase.make_ascii_uppercase(); assert_eq!(uppercase.bytes, b"GREEN GRAPES! \xf0\x9f\x8d\x87"); let mut uppercase = unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").to_owned() }; uppercase.make_ascii_uppercase(); assert_eq!(uppercase.bytes, b"\xED\xA0\x80"); assert!(!uppercase.is_known_utf8); } #[test] fn wtf8_to_owned() { let string = unsafe { Wtf8::from_bytes_unchecked(b"\xED\xA0\x80").to_owned() }; assert_eq!(string.bytes, b"\xED\xA0\x80"); assert!(!string.is_known_utf8); }