| #![allow(invalid_from_utf8)] |
| |
| use std::assert_matches::assert_matches; |
| use std::borrow::Cow; |
| use std::char::MAX_LEN_UTF8; |
| use std::cmp::Ordering::{Equal, Greater, Less}; |
| use std::str::{from_utf8, from_utf8_unchecked}; |
| |
| #[test] |
| fn test_le() { |
| assert!("" <= ""); |
| assert!("" <= "foo"); |
| assert!("foo" <= "foo"); |
| assert_ne!("foo", "bar"); |
| } |
| |
| #[test] |
| fn test_find() { |
| assert_eq!("hello".find('l'), Some(2)); |
| assert_eq!("hello".find(|c: char| c == 'o'), Some(4)); |
| assert!("hello".find('x').is_none()); |
| assert!("hello".find(|c: char| c == 'x').is_none()); |
| assert_eq!("ประเทศไทย中华Việt Nam".find('华'), Some(30)); |
| assert_eq!("ประเทศไทย中华Việt Nam".find(|c: char| c == '华'), Some(30)); |
| } |
| |
| #[test] |
| fn test_rfind() { |
| assert_eq!("hello".rfind('l'), Some(3)); |
| assert_eq!("hello".rfind(|c: char| c == 'o'), Some(4)); |
| assert!("hello".rfind('x').is_none()); |
| assert!("hello".rfind(|c: char| c == 'x').is_none()); |
| assert_eq!("ประเทศไทย中华Việt Nam".rfind('华'), Some(30)); |
| assert_eq!("ประเทศไทย中华Việt Nam".rfind(|c: char| c == '华'), Some(30)); |
| } |
| |
| #[test] |
| fn test_collect() { |
| let empty = ""; |
| let s: String = empty.chars().collect(); |
| assert_eq!(empty, s); |
| let data = "ประเทศไทย中"; |
| let s: String = data.chars().collect(); |
| assert_eq!(data, s); |
| } |
| |
| #[test] |
| fn test_into_bytes() { |
| let data = String::from("asdf"); |
| let buf = data.into_bytes(); |
| assert_eq!(buf, b"asdf"); |
| } |
| |
| #[test] |
| fn test_find_str() { |
| // byte positions |
| assert_eq!("".find(""), Some(0)); |
| assert!("banana".find("apple pie").is_none()); |
| |
| let data = "abcabc"; |
| assert_eq!(data[0..6].find("ab"), Some(0)); |
| assert_eq!(data[2..6].find("ab"), Some(3 - 2)); |
| assert!(data[2..4].find("ab").is_none()); |
| |
| let string = "ประเทศไทย中华Việt Nam"; |
| let mut data = String::from(string); |
| data.push_str(string); |
| assert!(data.find("ไท华").is_none()); |
| assert_eq!(data[0..43].find(""), Some(0)); |
| assert_eq!(data[6..43].find(""), Some(6 - 6)); |
| |
| assert_eq!(data[0..43].find("ประ"), Some(0)); |
| assert_eq!(data[0..43].find("ทศไ"), Some(12)); |
| assert_eq!(data[0..43].find("ย中"), Some(24)); |
| assert_eq!(data[0..43].find("iệt"), Some(34)); |
| assert_eq!(data[0..43].find("Nam"), Some(40)); |
| |
| assert_eq!(data[43..86].find("ประ"), Some(43 - 43)); |
| assert_eq!(data[43..86].find("ทศไ"), Some(55 - 43)); |
| assert_eq!(data[43..86].find("ย中"), Some(67 - 43)); |
| assert_eq!(data[43..86].find("iệt"), Some(77 - 43)); |
| assert_eq!(data[43..86].find("Nam"), Some(83 - 43)); |
| |
| // find every substring -- assert that it finds it, or an earlier occurrence. |
| let string = "Việt Namacbaabcaabaaba"; |
| for (i, ci) in string.char_indices() { |
| let ip = i + ci.len_utf8(); |
| for j in string[ip..].char_indices().map(|(i, _)| i).chain(Some(string.len() - ip)) { |
| let pat = &string[i..ip + j]; |
| assert!(match string.find(pat) { |
| None => false, |
| Some(x) => x <= i, |
| }); |
| assert!(match string.rfind(pat) { |
| None => false, |
| Some(x) => x >= i, |
| }); |
| } |
| } |
| } |
| |
| fn s(x: &str) -> String { |
| x.to_string() |
| } |
| |
| macro_rules! test_concat { |
| ($expected: expr, $string: expr) => {{ |
| let s: String = $string.concat(); |
| assert_eq!($expected, s); |
| }}; |
| } |
| |
| #[test] |
| fn test_concat_for_different_types() { |
| test_concat!("ab", vec![s("a"), s("b")]); |
| test_concat!("ab", vec!["a", "b"]); |
| } |
| |
| #[test] |
| fn test_concat_for_different_lengths() { |
| let empty: &[&str] = &[]; |
| test_concat!("", empty); |
| test_concat!("a", ["a"]); |
| test_concat!("ab", ["a", "b"]); |
| test_concat!("abc", ["", "a", "bc"]); |
| } |
| |
| macro_rules! test_join { |
| ($expected: expr, $string: expr, $delim: expr) => {{ |
| let s = $string.join($delim); |
| assert_eq!($expected, s); |
| }}; |
| } |
| |
| #[test] |
| fn test_join_for_different_types() { |
| test_join!("a-b", ["a", "b"], "-"); |
| let hyphen = "-".to_string(); |
| test_join!("a-b", [s("a"), s("b")], &*hyphen); |
| test_join!("a-b", vec!["a", "b"], &*hyphen); |
| test_join!("a-b", &*vec!["a", "b"], "-"); |
| test_join!("a-b", vec![s("a"), s("b")], "-"); |
| } |
| |
| #[test] |
| fn test_join_for_different_lengths() { |
| let empty: &[&str] = &[]; |
| test_join!("", empty, "-"); |
| test_join!("a", ["a"], "-"); |
| test_join!("a-b", ["a", "b"], "-"); |
| test_join!("-a-bc", ["", "a", "bc"], "-"); |
| } |
| |
| // join has fast paths for small separators up to 4 bytes |
| // this tests the slow paths. |
| #[test] |
| fn test_join_for_different_lengths_with_long_separator() { |
| assert_eq!("～～～～～".len(), 15); |
| |
| let empty: &[&str] = &[]; |
| test_join!("", empty, "～～～～～"); |
| test_join!("a", ["a"], "～～～～～"); |
| test_join!("a～～～～～b", ["a", "b"], "～～～～～"); |
| test_join!("～～～～～a～～～～～bc", ["", "a", "bc"], "～～～～～"); |
| } |
| |
| #[test] |
| fn test_join_issue_80335() { |
| use core::borrow::Borrow; |
| use core::cell::Cell; |
| |
| struct WeirdBorrow { |
| state: Cell<bool>, |
| } |
| |
| impl Default for WeirdBorrow { |
| fn default() -> Self { |
| WeirdBorrow { state: Cell::new(false) } |
| } |
| } |
| |
| impl Borrow<str> for WeirdBorrow { |
| fn borrow(&self) -> &str { |
| let state = self.state.get(); |
| if state { |
| "0" |
| } else { |
| self.state.set(true); |
| "123456" |
| } |
| } |
| } |
| |
| let arr: [WeirdBorrow; 3] = Default::default(); |
| test_join!("0-0-0", arr, "-"); |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_unsafe_slice() { |
| assert_eq!("ab", unsafe { "abc".get_unchecked(0..2) }); |
| assert_eq!("bc", unsafe { "abc".get_unchecked(1..3) }); |
| assert_eq!("", unsafe { "abc".get_unchecked(1..1) }); |
| fn a_million_letter_a() -> String { |
| let mut i = 0; |
| let mut rs = String::new(); |
| while i < 100000 { |
| rs.push_str("aaaaaaaaaa"); |
| i += 1; |
| } |
| rs |
| } |
| fn half_a_million_letter_a() -> String { |
| let mut i = 0; |
| let mut rs = String::new(); |
| while i < 100000 { |
| rs.push_str("aaaaa"); |
| i += 1; |
| } |
| rs |
| } |
| let letters = a_million_letter_a(); |
| assert_eq!(half_a_million_letter_a(), unsafe { letters.get_unchecked(0..500000) }); |
| } |
| |
| #[test] |
| fn test_starts_with() { |
| assert!("".starts_with("")); |
| assert!("abc".starts_with("")); |
| assert!("abc".starts_with("a")); |
| assert!(!"a".starts_with("abc")); |
| assert!(!"".starts_with("abc")); |
| assert!(!"ödd".starts_with("-")); |
| assert!("ödd".starts_with("öd")); |
| } |
| |
| #[test] |
| fn test_ends_with() { |
| assert!("".ends_with("")); |
| assert!("abc".ends_with("")); |
| assert!("abc".ends_with("c")); |
| assert!(!"a".ends_with("abc")); |
| assert!(!"".ends_with("abc")); |
| assert!(!"ddö".ends_with("-")); |
| assert!("ddö".ends_with("dö")); |
| } |
| |
| #[test] |
| fn test_is_empty() { |
| assert!("".is_empty()); |
| assert!(!"a".is_empty()); |
| } |
| |
| #[test] |
| fn test_replacen() { |
| assert_eq!("".replacen('a', "b", 5), ""); |
| assert_eq!("acaaa".replacen("a", "b", 3), "bcbba"); |
| assert_eq!("aaaa".replacen("a", "b", 0), "aaaa"); |
| |
| let test = "test"; |
| assert_eq!(" test test ".replacen(test, "toast", 3), " toast toast "); |
| assert_eq!(" test test ".replacen(test, "toast", 0), " test test "); |
| assert_eq!(" test test ".replacen(test, "", 5), " "); |
| |
| assert_eq!("qwer123zxc789".replacen(char::is_numeric, "", 3), "qwerzxc789"); |
| } |
| |
| #[test] |
| fn test_replace() { |
| let a = "a"; |
| assert_eq!("".replace(a, "b"), ""); |
| assert_eq!("a".replace(a, "b"), "b"); |
| assert_eq!("ab".replace(a, "b"), "bb"); |
| let test = "test"; |
| assert_eq!(" test test ".replace(test, "toast"), " toast toast "); |
| assert_eq!(" test test ".replace(test, ""), " "); |
| } |
| |
| #[test] |
| fn test_replace_2a() { |
| let data = "ประเทศไทย中华"; |
| let repl = "دولة الكويت"; |
| |
| let a = "ประเ"; |
| let a2 = "دولة الكويتทศไทย中华"; |
| assert_eq!(data.replace(a, repl), a2); |
| } |
| |
| #[test] |
| fn test_replace_2b() { |
| let data = "ประเทศไทย中华"; |
| let repl = "دولة الكويت"; |
| |
| let b = "ะเ"; |
| let b2 = "ปรدولة الكويتทศไทย中华"; |
| assert_eq!(data.replace(b, repl), b2); |
| } |
| |
| #[test] |
| fn test_replace_2c() { |
| let data = "ประเทศไทย中华"; |
| let repl = "دولة الكويت"; |
| |
| let c = "中华"; |
| let c2 = "ประเทศไทยدولة الكويت"; |
| assert_eq!(data.replace(c, repl), c2); |
| } |
| |
| #[test] |
| fn test_replace_2d() { |
| let data = "ประเทศไทย中华"; |
| let repl = "دولة الكويت"; |
| |
| let d = "ไท华"; |
| assert_eq!(data.replace(d, repl), data); |
| } |
| |
| #[test] |
| fn test_replace_pattern() { |
| let data = "abcdαβγδabcdαβγδ"; |
| assert_eq!(data.replace("dαβ", "😺😺😺"), "abc😺😺😺γδabc😺😺😺γδ"); |
| assert_eq!(data.replace('γ', "😺😺😺"), "abcdαβ😺😺😺δabcdαβ😺😺😺δ"); |
| assert_eq!(data.replace(&['a', 'γ'] as &[_], "😺😺😺"), "😺😺😺bcdαβ😺😺😺δ😺😺😺bcdαβ😺😺😺δ"); |
| assert_eq!(data.replace(|c| c == 'γ', "😺😺😺"), "abcdαβ😺😺😺δabcdαβ😺😺😺δ"); |
| } |
| |
| // The current implementation of SliceIndex fails to handle methods |
| // orthogonally from range types; therefore, it is worth testing |
| // all of the indexing operations on each input. |
| mod slice_index { |
| // Test a slicing operation **that should succeed,** |
| // testing it on all of the indexing methods. |
| // |
| // This is not suitable for testing failure on invalid inputs. |
| macro_rules! assert_range_eq { |
| ($s:expr, $range:expr, $expected:expr) => { |
| let mut s: String = $s.to_owned(); |
| let mut expected: String = $expected.to_owned(); |
| { |
| let s: &str = &s; |
| let expected: &str = &expected; |
| |
| assert_eq!(&s[$range], expected, "(in assertion for: index)"); |
| assert_eq!(s.get($range), Some(expected), "(in assertion for: get)"); |
| unsafe { |
| assert_eq!( |
| s.get_unchecked($range), |
| expected, |
| "(in assertion for: get_unchecked)", |
| ); |
| } |
| } |
| { |
| let s: &mut str = &mut s; |
| let expected: &mut str = &mut expected; |
| |
| assert_eq!(&mut s[$range], expected, "(in assertion for: index_mut)",); |
| assert_eq!( |
| s.get_mut($range), |
| Some(&mut expected[..]), |
| "(in assertion for: get_mut)", |
| ); |
| unsafe { |
| assert_eq!( |
| s.get_unchecked_mut($range), |
| expected, |
| "(in assertion for: get_unchecked_mut)", |
| ); |
| } |
| } |
| }; |
| } |
| |
| // Make sure the macro can actually detect bugs, |
| // because if it can't, then what are we even doing here? |
| // |
| // (Be aware this only demonstrates the ability to detect bugs |
| // in the FIRST method that panics, as the macro is not designed |
| // to be used in `should_panic`) |
| #[test] |
| #[should_panic(expected = "out of bounds")] |
| fn assert_range_eq_can_fail_by_panic() { |
| assert_range_eq!("abc", 0..5, "abc"); |
| } |
| |
| // (Be aware this only demonstrates the ability to detect bugs |
| // in the FIRST method it calls, as the macro is not designed |
| // to be used in `should_panic`) |
| #[test] |
| #[should_panic(expected = "==")] |
| fn assert_range_eq_can_fail_by_inequality() { |
| assert_range_eq!("abc", 0..2, "abc"); |
| } |
| |
| // Generates test cases for bad index operations. |
| // |
| // This generates `should_panic` test cases for Index/IndexMut |
| // and `None` test cases for get/get_mut. |
| macro_rules! panic_cases { |
| ($( |
| in mod $case_name:ident { |
| data: $data:expr; |
| |
| // optional: |
| // |
| // a similar input for which DATA[input] succeeds, and the corresponding |
| // output str. This helps validate "critical points" where an input range |
| // straddles the boundary between valid and invalid. |
| // (such as the input `len..len`, which is just barely valid) |
| $( |
| good: data[$good:expr] == $output:expr; |
| )* |
| |
| bad: data[$bad:expr]; |
| message: $expect_msg:expr; // must be a literal |
| } |
| )*) => {$( |
| mod $case_name { |
| #[test] |
| fn pass() { |
| let mut v: String = $data.into(); |
| |
| $( assert_range_eq!(v, $good, $output); )* |
| |
| { |
| let v: &str = &v; |
| assert_eq!(v.get($bad), None, "(in None assertion for get)"); |
| } |
| |
| { |
| let v: &mut str = &mut v; |
| assert_eq!(v.get_mut($bad), None, "(in None assertion for get_mut)"); |
| } |
| } |
| |
| #[test] |
| #[should_panic(expected = $expect_msg)] |
| fn index_fail() { |
| let v: String = $data.into(); |
| let v: &str = &v; |
| let _v = &v[$bad]; |
| } |
| |
| #[test] |
| #[should_panic(expected = $expect_msg)] |
| fn index_mut_fail() { |
| let mut v: String = $data.into(); |
| let v: &mut str = &mut v; |
| let _v = &mut v[$bad]; |
| } |
| } |
| )*}; |
| } |
| |
| #[test] |
| fn simple_ascii() { |
| assert_range_eq!("abc", .., "abc"); |
| |
| assert_range_eq!("abc", 0..2, "ab"); |
| assert_range_eq!("abc", 0..=1, "ab"); |
| assert_range_eq!("abc", ..2, "ab"); |
| assert_range_eq!("abc", ..=1, "ab"); |
| |
| assert_range_eq!("abc", 1..3, "bc"); |
| assert_range_eq!("abc", 1..=2, "bc"); |
| assert_range_eq!("abc", 1..1, ""); |
| assert_range_eq!("abc", 1..=0, ""); |
| } |
| |
| #[test] |
| fn simple_unicode() { |
| // 日本 |
| assert_range_eq!("\u{65e5}\u{672c}", .., "\u{65e5}\u{672c}"); |
| |
| assert_range_eq!("\u{65e5}\u{672c}", 0..3, "\u{65e5}"); |
| assert_range_eq!("\u{65e5}\u{672c}", 0..=2, "\u{65e5}"); |
| assert_range_eq!("\u{65e5}\u{672c}", ..3, "\u{65e5}"); |
| assert_range_eq!("\u{65e5}\u{672c}", ..=2, "\u{65e5}"); |
| |
| assert_range_eq!("\u{65e5}\u{672c}", 3..6, "\u{672c}"); |
| assert_range_eq!("\u{65e5}\u{672c}", 3..=5, "\u{672c}"); |
| assert_range_eq!("\u{65e5}\u{672c}", 3.., "\u{672c}"); |
| |
| let data = "ประเทศไทย中华"; |
| assert_range_eq!(data, 0..3, "ป"); |
| assert_range_eq!(data, 3..6, "ร"); |
| assert_range_eq!(data, 3..3, ""); |
| assert_range_eq!(data, 30..33, "华"); |
| |
| /*0: 中 |
| 3: 华 |
| 6: V |
| 7: i |
| 8: ệ |
| 11: t |
| 12: |
| 13: N |
| 14: a |
| 15: m */ |
| let ss = "中华Việt Nam"; |
| assert_range_eq!(ss, 3..6, "华"); |
| assert_range_eq!(ss, 6..16, "Việt Nam"); |
| assert_range_eq!(ss, 6..=15, "Việt Nam"); |
| assert_range_eq!(ss, 6.., "Việt Nam"); |
| |
| assert_range_eq!(ss, 0..3, "中"); |
| assert_range_eq!(ss, 3..7, "华V"); |
| assert_range_eq!(ss, 3..=6, "华V"); |
| assert_range_eq!(ss, 3..3, ""); |
| assert_range_eq!(ss, 3..=2, ""); |
| } |
| |
| #[test] |
| #[cfg_attr(target_os = "emscripten", ignore)] // hits an OOM |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn simple_big() { |
| fn a_million_letter_x() -> String { |
| let mut i = 0; |
| let mut rs = String::new(); |
| while i < 100000 { |
| rs.push_str("华华华华华华华华华华"); |
| i += 1; |
| } |
| rs |
| } |
| fn half_a_million_letter_x() -> String { |
| let mut i = 0; |
| let mut rs = String::new(); |
| while i < 100000 { |
| rs.push_str("华华华华华"); |
| i += 1; |
| } |
| rs |
| } |
| let letters = a_million_letter_x(); |
| assert_range_eq!(letters, 0..3 * 500000, half_a_million_letter_x()); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_slice_fail() { |
| let _ = &"中华Việt Nam"[0..2]; |
| } |
| |
| panic_cases! { |
| in mod rangefrom_len { |
| data: "abcdef"; |
| good: data[6..] == ""; |
| bad: data[7..]; |
| message: "out of bounds"; |
| } |
| |
| in mod rangeto_len { |
| data: "abcdef"; |
| good: data[..6] == "abcdef"; |
| bad: data[..7]; |
| message: "out of bounds"; |
| } |
| |
| in mod rangetoinclusive_len { |
| data: "abcdef"; |
| good: data[..=5] == "abcdef"; |
| bad: data[..=6]; |
| message: "out of bounds"; |
| } |
| |
| in mod rangeinclusive_len { |
| data: "abcdef"; |
| good: data[0..=5] == "abcdef"; |
| bad: data[0..=6]; |
| message: "out of bounds"; |
| } |
| |
| in mod range_len_len { |
| data: "abcdef"; |
| good: data[6..6] == ""; |
| bad: data[7..7]; |
| message: "out of bounds"; |
| } |
| |
| in mod rangeinclusive_len_len { |
| data: "abcdef"; |
| good: data[6..=5] == ""; |
| bad: data[7..=6]; |
| message: "out of bounds"; |
| } |
| } |
| |
| panic_cases! { |
| in mod rangeinclusive_exhausted { |
| data: "abcdef"; |
| |
| good: data[0..=5] == "abcdef"; |
| good: data[{ |
| let mut iter = 0..=5; |
| iter.by_ref().count(); // exhaust it |
| iter |
| }] == ""; |
| |
| // 0..=6 is out of bounds before exhaustion, so it |
| // stands to reason that it still would be after. |
| bad: data[{ |
| let mut iter = 0..=6; |
| iter.by_ref().count(); // exhaust it |
| iter |
| }]; |
| message: "out of bounds"; |
| } |
| } |
| |
| panic_cases! { |
| in mod range_neg_width { |
| data: "abcdef"; |
| good: data[4..4] == ""; |
| bad: data[4..3]; |
| message: "begin <= end (4 <= 3)"; |
| } |
| |
| in mod rangeinclusive_neg_width { |
| data: "abcdef"; |
| good: data[4..=3] == ""; |
| bad: data[4..=2]; |
| message: "begin <= end (4 <= 3)"; |
| } |
| } |
| |
| mod overflow { |
| panic_cases! { |
| in mod rangeinclusive { |
| data: "hello"; |
| // note: using 0 specifically ensures that the result of overflowing is 0..0, |
| // so that `get` doesn't simply return None for the wrong reason. |
| bad: data[0..=usize::MAX]; |
| message: "maximum usize"; |
| } |
| |
| in mod rangetoinclusive { |
| data: "hello"; |
| bad: data[..=usize::MAX]; |
| message: "maximum usize"; |
| } |
| } |
| } |
| |
| mod boundary { |
| const DATA: &str = "abcαβγ"; |
| |
| const BAD_START: usize = 4; |
| const GOOD_START: usize = 3; |
| const BAD_END: usize = 6; |
| const GOOD_END: usize = 7; |
| const BAD_END_INCL: usize = BAD_END - 1; |
| const GOOD_END_INCL: usize = GOOD_END - 1; |
| |
| // it is especially important to test all of the different range types here |
| // because some of the logic may be duplicated as part of micro-optimizations |
| // to dodge unicode boundary checks on half-ranges. |
| panic_cases! { |
| in mod range_1 { |
| data: super::DATA; |
| bad: data[super::BAD_START..super::GOOD_END]; |
| message: |
| "byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of"; |
| } |
| |
| in mod range_2 { |
| data: super::DATA; |
| bad: data[super::GOOD_START..super::BAD_END]; |
| message: |
| "byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of"; |
| } |
| |
| in mod rangefrom { |
| data: super::DATA; |
| bad: data[super::BAD_START..]; |
| message: |
| "byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of"; |
| } |
| |
| in mod rangeto { |
| data: super::DATA; |
| bad: data[..super::BAD_END]; |
| message: |
| "byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of"; |
| } |
| |
| in mod rangeinclusive_1 { |
| data: super::DATA; |
| bad: data[super::BAD_START..=super::GOOD_END_INCL]; |
| message: |
| "byte index 4 is not a char boundary; it is inside 'α' (bytes 3..5) of"; |
| } |
| |
| in mod rangeinclusive_2 { |
| data: super::DATA; |
| bad: data[super::GOOD_START..=super::BAD_END_INCL]; |
| message: |
| "byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of"; |
| } |
| |
| in mod rangetoinclusive { |
| data: super::DATA; |
| bad: data[..=super::BAD_END_INCL]; |
| message: |
| "byte index 6 is not a char boundary; it is inside 'β' (bytes 5..7) of"; |
| } |
| } |
| } |
| |
| const LOREM_PARAGRAPH: &str = "\ |
| Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse quis lorem \ |
| sit amet dolor ultricies condimentum. Praesent iaculis purus elit, ac malesuada \ |
| quam malesuada in. Duis sed orci eros. Suspendisse sit amet magna mollis, mollis \ |
| nunc luctus, imperdiet mi. Integer fringilla non sem ut lacinia. Fusce varius \ |
| tortor a risus porttitor hendrerit. Morbi mauris dui, ultricies nec tempus vel, \ |
| gravida nec quam."; |
| |
| // check the panic includes the prefix of the sliced string |
| #[test] |
| #[should_panic(expected = "byte index 1024 is out of bounds of `Lorem ipsum dolor sit amet")] |
| fn test_slice_fail_truncated_1() { |
| let _ = &LOREM_PARAGRAPH[..1024]; |
| } |
| // check the truncation in the panic message |
| #[test] |
| #[should_panic(expected = "luctus, im`[...]")] |
| fn test_slice_fail_truncated_2() { |
| let _ = &LOREM_PARAGRAPH[..1024]; |
| } |
| } |
| |
| #[test] |
| fn test_str_slice_rangetoinclusive_ok() { |
| let s = "abcαβγ"; |
| assert_eq!(&s[..=2], "abc"); |
| assert_eq!(&s[..=4], "abcα"); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_str_slice_rangetoinclusive_notok() { |
| let s = "abcαβγ"; |
| let _ = &s[..=3]; |
| } |
| |
| #[test] |
| fn test_str_slicemut_rangetoinclusive_ok() { |
| let mut s = "abcαβγ".to_owned(); |
| let s: &mut str = &mut s; |
| assert_eq!(&mut s[..=2], "abc"); |
| assert_eq!(&mut s[..=4], "abcα"); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_str_slicemut_rangetoinclusive_notok() { |
| let mut s = "abcαβγ".to_owned(); |
| let s: &mut str = &mut s; |
| let _ = &mut s[..=3]; |
| } |
| |
| #[test] |
| fn test_is_char_boundary() { |
| let s = "ศไทย中华Việt Nam β-release 🐱123"; |
| assert!(s.is_char_boundary(0)); |
| assert!(s.is_char_boundary(s.len())); |
| assert!(!s.is_char_boundary(s.len() + 1)); |
| for (i, ch) in s.char_indices() { |
| // ensure character locations are boundaries and continuation bytes are not |
| assert!(s.is_char_boundary(i), "{} is a char boundary in {:?}", i, s); |
| for j in 1..ch.len_utf8() { |
| assert!( |
| !s.is_char_boundary(i + j), |
| "{} should not be a char boundary in {:?}", |
| i + j, |
| s |
| ); |
| } |
| } |
| } |
| |
| #[test] |
| fn test_trim_start_matches() { |
| let v: &[char] = &[]; |
| assert_eq!(" *** foo *** ".trim_start_matches(v), " *** foo *** "); |
| let chars: &[char] = &['*', ' ']; |
| assert_eq!(" *** foo *** ".trim_start_matches(chars), "foo *** "); |
| assert_eq!(" *** *** ".trim_start_matches(chars), ""); |
| assert_eq!("foo *** ".trim_start_matches(chars), "foo *** "); |
| |
| assert_eq!("11foo1bar11".trim_start_matches('1'), "foo1bar11"); |
| let chars: &[char] = &['1', '2']; |
| assert_eq!("12foo1bar12".trim_start_matches(chars), "foo1bar12"); |
| assert_eq!("123foo1bar123".trim_start_matches(|c: char| c.is_numeric()), "foo1bar123"); |
| } |
| |
| #[test] |
| fn test_trim_end_matches() { |
| let v: &[char] = &[]; |
| assert_eq!(" *** foo *** ".trim_end_matches(v), " *** foo *** "); |
| let chars: &[char] = &['*', ' ']; |
| assert_eq!(" *** foo *** ".trim_end_matches(chars), " *** foo"); |
| assert_eq!(" *** *** ".trim_end_matches(chars), ""); |
| assert_eq!(" *** foo".trim_end_matches(chars), " *** foo"); |
| |
| assert_eq!("11foo1bar11".trim_end_matches('1'), "11foo1bar"); |
| let chars: &[char] = &['1', '2']; |
| assert_eq!("12foo1bar12".trim_end_matches(chars), "12foo1bar"); |
| assert_eq!("123foo1bar123".trim_end_matches(|c: char| c.is_numeric()), "123foo1bar"); |
| } |
| |
| #[test] |
| fn test_trim_matches() { |
| let v: &[char] = &[]; |
| assert_eq!(" *** foo *** ".trim_matches(v), " *** foo *** "); |
| let chars: &[char] = &['*', ' ']; |
| assert_eq!(" *** foo *** ".trim_matches(chars), "foo"); |
| assert_eq!(" *** *** ".trim_matches(chars), ""); |
| assert_eq!("foo".trim_matches(chars), "foo"); |
| |
| assert_eq!("11foo1bar11".trim_matches('1'), "foo1bar"); |
| let chars: &[char] = &['1', '2']; |
| assert_eq!("12foo1bar12".trim_matches(chars), "foo1bar"); |
| assert_eq!("123foo1bar123".trim_matches(|c: char| c.is_numeric()), "foo1bar"); |
| } |
| |
| #[test] |
| fn test_trim_start() { |
| assert_eq!("".trim_start(), ""); |
| assert_eq!("a".trim_start(), "a"); |
| assert_eq!(" ".trim_start(), ""); |
| assert_eq!(" blah".trim_start(), "blah"); |
| assert_eq!(" \u{3000} wut".trim_start(), "wut"); |
| assert_eq!("hey ".trim_start(), "hey "); |
| } |
| |
| #[test] |
| fn test_trim_end() { |
| assert_eq!("".trim_end(), ""); |
| assert_eq!("a".trim_end(), "a"); |
| assert_eq!(" ".trim_end(), ""); |
| assert_eq!("blah ".trim_end(), "blah"); |
| assert_eq!("wut \u{3000} ".trim_end(), "wut"); |
| assert_eq!(" hey".trim_end(), " hey"); |
| } |
| |
| #[test] |
| fn test_trim() { |
| assert_eq!("".trim(), ""); |
| assert_eq!("a".trim(), "a"); |
| assert_eq!(" ".trim(), ""); |
| assert_eq!(" blah ".trim(), "blah"); |
| assert_eq!("\nwut \u{3000} ".trim(), "wut"); |
| assert_eq!(" hey dude ".trim(), "hey dude"); |
| } |
| |
| #[test] |
| fn test_is_whitespace() { |
| assert!("".chars().all(|c| c.is_whitespace())); |
| assert!(" ".chars().all(|c| c.is_whitespace())); |
| assert!("\u{2009}".chars().all(|c| c.is_whitespace())); // Thin space |
| assert!(" \n\t ".chars().all(|c| c.is_whitespace())); |
| assert!(!" _ ".chars().all(|c| c.is_whitespace())); |
| } |
| |
| #[test] |
| fn test_is_utf8() { |
| // deny overlong encodings |
| assert!(from_utf8(&[0xc0, 0x80]).is_err()); |
| assert!(from_utf8(&[0xc0, 0xae]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x80, 0x80]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x80, 0xaf]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x81, 0x81]).is_err()); |
| assert!(from_utf8(&[0xf0, 0x82, 0x82, 0xac]).is_err()); |
| assert!(from_utf8(&[0xf4, 0x90, 0x80, 0x80]).is_err()); |
| |
| // deny surrogates |
| assert!(from_utf8(&[0xED, 0xA0, 0x80]).is_err()); |
| assert!(from_utf8(&[0xED, 0xBF, 0xBF]).is_err()); |
| |
| assert!(from_utf8(&[0xC2, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xDF, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xE0, 0xA0, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xED, 0x9F, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xEE, 0x80, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xEF, 0xBF, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xF0, 0x90, 0x80, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xF4, 0x8F, 0xBF, 0xBF]).is_ok()); |
| } |
| |
| #[test] |
| fn test_const_is_utf8() { |
| const _: () = { |
| // deny overlong encodings |
| assert!(from_utf8(&[0xc0, 0x80]).is_err()); |
| assert!(from_utf8(&[0xc0, 0xae]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x80, 0x80]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x80, 0xaf]).is_err()); |
| assert!(from_utf8(&[0xe0, 0x81, 0x81]).is_err()); |
| assert!(from_utf8(&[0xf0, 0x82, 0x82, 0xac]).is_err()); |
| assert!(from_utf8(&[0xf4, 0x90, 0x80, 0x80]).is_err()); |
| |
| // deny surrogates |
| assert!(from_utf8(&[0xED, 0xA0, 0x80]).is_err()); |
| assert!(from_utf8(&[0xED, 0xBF, 0xBF]).is_err()); |
| |
| assert!(from_utf8(&[0xC2, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xDF, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xE0, 0xA0, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xED, 0x9F, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xEE, 0x80, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xEF, 0xBF, 0xBF]).is_ok()); |
| assert!(from_utf8(&[0xF0, 0x90, 0x80, 0x80]).is_ok()); |
| assert!(from_utf8(&[0xF4, 0x8F, 0xBF, 0xBF]).is_ok()); |
| }; |
| } |
| |
| #[test] |
| fn from_utf8_mostly_ascii() { |
| // deny invalid bytes embedded in long stretches of ascii |
| for i in 32..64 { |
| let mut data = [0; 128]; |
| data[i] = 0xC0; |
| assert!(from_utf8(&data).is_err()); |
| data[i] = 0xC2; |
| assert!(from_utf8(&data).is_err()); |
| } |
| } |
| |
| #[test] |
| fn const_from_utf8_mostly_ascii() { |
| const _: () = { |
| // deny invalid bytes embedded in long stretches of ascii |
| let mut i = 32; |
| while i < 64 { |
| let mut data = [0; 128]; |
| data[i] = 0xC0; |
| assert!(from_utf8(&data).is_err()); |
| data[i] = 0xC2; |
| assert!(from_utf8(&data).is_err()); |
| |
| i = i + 1; |
| } |
| }; |
| } |
| |
| #[test] |
| fn from_utf8_error() { |
| macro_rules! test { |
| ($input: expr, $expected_valid_up_to:pat, $expected_error_len:pat) => { |
| let error = from_utf8($input).unwrap_err(); |
| assert_matches!(error.valid_up_to(), $expected_valid_up_to); |
| assert_matches!(error.error_len(), $expected_error_len); |
| |
| const _: () = { |
| match from_utf8($input) { |
| Err(error) => { |
| let valid_up_to = error.valid_up_to(); |
| let error_len = error.error_len(); |
| |
| assert!(matches!(valid_up_to, $expected_valid_up_to)); |
| assert!(matches!(error_len, $expected_error_len)); |
| } |
| Ok(_) => unreachable!(), |
| } |
| }; |
| }; |
| } |
| test!(b"A\xC3\xA9 \xFF ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \x80 ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xC1 ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xC1", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xC2", 4, None); |
| test!(b"A\xC3\xA9 \xC2 ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xC2\xC0", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xE0", 4, None); |
| test!(b"A\xC3\xA9 \xE0\x9F", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xE0\xA0", 4, None); |
| test!(b"A\xC3\xA9 \xE0\xA0\xC0", 4, Some(2)); |
| test!(b"A\xC3\xA9 \xE0\xA0 ", 4, Some(2)); |
| test!(b"A\xC3\xA9 \xED\xA0\x80 ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xF1", 4, None); |
| test!(b"A\xC3\xA9 \xF1\x80", 4, None); |
| test!(b"A\xC3\xA9 \xF1\x80\x80", 4, None); |
| test!(b"A\xC3\xA9 \xF1 ", 4, Some(1)); |
| test!(b"A\xC3\xA9 \xF1\x80 ", 4, Some(2)); |
| test!(b"A\xC3\xA9 \xF1\x80\x80 ", 4, Some(3)); |
| } |
| |
| #[test] |
| fn test_as_bytes() { |
| // no null |
| let v = [ |
| 224, 184, 168, 224, 185, 132, 224, 184, 151, 224, 184, 162, 228, 184, 173, 229, 141, 142, |
| 86, 105, 225, 187, 135, 116, 32, 78, 97, 109, |
| ]; |
| let b: &[u8] = &[]; |
| assert_eq!("".as_bytes(), b); |
| assert_eq!("abc".as_bytes(), b"abc"); |
| assert_eq!("ศไทย中华Việt Nam".as_bytes(), v); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_as_bytes_fail() { |
| // Don't double free. (I'm not sure if this exercises the |
| // original problem code path anymore.) |
| let s = String::from(""); |
| let _bytes = s.as_bytes(); |
| panic!(); |
| } |
| |
| #[test] |
| fn test_as_ptr() { |
| let buf = "hello".as_ptr(); |
| unsafe { |
| assert_eq!(*buf.add(0), b'h'); |
| assert_eq!(*buf.add(1), b'e'); |
| assert_eq!(*buf.add(2), b'l'); |
| assert_eq!(*buf.add(3), b'l'); |
| assert_eq!(*buf.add(4), b'o'); |
| } |
| } |
| |
| #[test] |
| fn vec_str_conversions() { |
| let s1: String = String::from("All mimsy were the borogoves"); |
| |
| let v: Vec<u8> = s1.as_bytes().to_vec(); |
| let s2: String = String::from(from_utf8(&v).unwrap()); |
| let mut i = 0; |
| let n1 = s1.len(); |
| let n2 = v.len(); |
| assert_eq!(n1, n2); |
| while i < n1 { |
| let a: u8 = s1.as_bytes()[i]; |
| let b: u8 = s2.as_bytes()[i]; |
| assert_eq!(a, b); |
| i += 1; |
| } |
| } |
| |
| #[test] |
| fn test_contains() { |
| assert!("abcde".contains("bcd")); |
| assert!("abcde".contains("abcd")); |
| assert!("abcde".contains("bcde")); |
| assert!("abcde".contains("")); |
| assert!("".contains("")); |
| assert!(!"abcde".contains("def")); |
| assert!(!"".contains("a")); |
| |
| let data = "ประเทศไทย中华Việt Nam"; |
| assert!(data.contains("ประเ")); |
| assert!(data.contains("ะเ")); |
| assert!(data.contains("中华")); |
| assert!(!data.contains("ไท华")); |
| } |
| |
| #[test] |
| fn test_contains_char() { |
| assert!("abc".contains('b')); |
| assert!("a".contains('a')); |
| assert!(!"abc".contains('d')); |
| assert!(!"".contains('a')); |
| } |
| |
| #[test] |
| fn test_split_at() { |
| let s = "ศไทย中华Việt Nam"; |
| for (index, _) in s.char_indices() { |
| let (a, b) = s.split_at(index); |
| assert_eq!(&s[..a.len()], a); |
| assert_eq!(&s[a.len()..], b); |
| } |
| let (a, b) = s.split_at(s.len()); |
| assert_eq!(a, s); |
| assert_eq!(b, ""); |
| } |
| |
| #[test] |
| fn test_split_at_mut() { |
| let mut s = "Hello World".to_string(); |
| { |
| let (a, b) = s.split_at_mut(5); |
| a.make_ascii_uppercase(); |
| b.make_ascii_lowercase(); |
| } |
| assert_eq!(s, "HELLO world"); |
| } |
| |
| #[test] |
| #[should_panic] |
| fn test_split_at_boundscheck() { |
| let s = "ศไทย中华Việt Nam"; |
| let _ = s.split_at(1); |
| } |
| |
| #[test] |
| fn test_escape_unicode() { |
| assert_eq!("abc".escape_unicode().to_string(), "\\u{61}\\u{62}\\u{63}"); |
| assert_eq!("a c".escape_unicode().to_string(), "\\u{61}\\u{20}\\u{63}"); |
| assert_eq!("\r\n\t".escape_unicode().to_string(), "\\u{d}\\u{a}\\u{9}"); |
| assert_eq!("'\"\\".escape_unicode().to_string(), "\\u{27}\\u{22}\\u{5c}"); |
| assert_eq!("\x00\x01\u{fe}\u{ff}".escape_unicode().to_string(), "\\u{0}\\u{1}\\u{fe}\\u{ff}"); |
| assert_eq!("\u{100}\u{ffff}".escape_unicode().to_string(), "\\u{100}\\u{ffff}"); |
| assert_eq!("\u{10000}\u{10ffff}".escape_unicode().to_string(), "\\u{10000}\\u{10ffff}"); |
| assert_eq!("ab\u{fb00}".escape_unicode().to_string(), "\\u{61}\\u{62}\\u{fb00}"); |
| assert_eq!("\u{1d4ea}\r".escape_unicode().to_string(), "\\u{1d4ea}\\u{d}"); |
| } |
| |
| #[test] |
| fn test_escape_debug() { |
| // Note that there are subtleties with the number of backslashes |
| // on the left- and right-hand sides. In particular, Unicode code points |
| // are usually escaped with two backslashes on the right-hand side, as |
| // they are escaped. However, when the character is unescaped (e.g., for |
| // printable characters), only a single backslash appears (as the character |
| // itself appears in the debug string). |
| assert_eq!("abc".escape_debug().to_string(), "abc"); |
| assert_eq!("a c".escape_debug().to_string(), "a c"); |
| assert_eq!("éèê".escape_debug().to_string(), "éèê"); |
| assert_eq!("\0\r\n\t".escape_debug().to_string(), "\\0\\r\\n\\t"); |
| assert_eq!("'\"\\".escape_debug().to_string(), "\\'\\\"\\\\"); |
| assert_eq!("\u{7f}\u{ff}".escape_debug().to_string(), "\\u{7f}\u{ff}"); |
| assert_eq!("\u{100}\u{ffff}".escape_debug().to_string(), "\u{100}\\u{ffff}"); |
| assert_eq!("\u{10000}\u{10ffff}".escape_debug().to_string(), "\u{10000}\\u{10ffff}"); |
| assert_eq!("ab\u{200b}".escape_debug().to_string(), "ab\\u{200b}"); |
| assert_eq!("\u{10d4ea}\r".escape_debug().to_string(), "\\u{10d4ea}\\r"); |
| assert_eq!( |
| "\u{301}a\u{301}bé\u{e000}".escape_debug().to_string(), |
| "\\u{301}a\u{301}bé\\u{e000}" |
| ); |
| } |
| |
| #[test] |
| fn test_escape_default() { |
| assert_eq!("abc".escape_default().to_string(), "abc"); |
| assert_eq!("a c".escape_default().to_string(), "a c"); |
| assert_eq!("éèê".escape_default().to_string(), "\\u{e9}\\u{e8}\\u{ea}"); |
| assert_eq!("\r\n\t".escape_default().to_string(), "\\r\\n\\t"); |
| assert_eq!("'\"\\".escape_default().to_string(), "\\'\\\"\\\\"); |
| assert_eq!("\u{7f}\u{ff}".escape_default().to_string(), "\\u{7f}\\u{ff}"); |
| assert_eq!("\u{100}\u{ffff}".escape_default().to_string(), "\\u{100}\\u{ffff}"); |
| assert_eq!("\u{10000}\u{10ffff}".escape_default().to_string(), "\\u{10000}\\u{10ffff}"); |
| assert_eq!("ab\u{200b}".escape_default().to_string(), "ab\\u{200b}"); |
| assert_eq!("\u{10d4ea}\r".escape_default().to_string(), "\\u{10d4ea}\\r"); |
| } |
| |
| #[test] |
| fn test_total_ord() { |
| assert_eq!("1234".cmp("123"), Greater); |
| assert_eq!("123".cmp("1234"), Less); |
| assert_eq!("1234".cmp("1234"), Equal); |
| assert_eq!("12345555".cmp("123456"), Less); |
| assert_eq!("22".cmp("1234"), Greater); |
| } |
| |
| #[test] |
| fn test_iterator() { |
| let s = "ศไทย中华Việt Nam"; |
| let v = ['ศ', 'ไ', 'ท', 'ย', '中', '华', 'V', 'i', 'ệ', 't', ' ', 'N', 'a', 'm']; |
| |
| let mut pos = 0; |
| let it = s.chars(); |
| |
| for c in it { |
| assert_eq!(c, v[pos]); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| assert_eq!(s.chars().count(), v.len()); |
| } |
| |
| #[test] |
| fn test_iterator_advance() { |
| let s = "「赤錆」と呼ばれる鉄錆は、水の存在下での鉄の自然酸化によって生じる、オキシ水酸化鉄(III) 等の（含水）酸化物粒子の疎な凝集膜であるとみなせる。"; |
| let chars: Vec<char> = s.chars().collect(); |
| let mut it = s.chars(); |
| it.advance_by(1).unwrap(); |
| assert_eq!(it.next(), Some(chars[1])); |
| it.advance_by(33).unwrap(); |
| assert_eq!(it.next(), Some(chars[35])); |
| } |
| |
| #[test] |
| fn test_rev_iterator() { |
| let s = "ศไทย中华Việt Nam"; |
| let v = ['m', 'a', 'N', ' ', 't', 'ệ', 'i', 'V', '华', '中', 'ย', 'ท', 'ไ', 'ศ']; |
| |
| let mut pos = 0; |
| let it = s.chars().rev(); |
| |
| for c in it { |
| assert_eq!(c, v[pos]); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| } |
| |
| #[test] |
| fn test_to_lowercase_rev_iterator() { |
| let s = "AÖßÜ💩ΣΤΙΓΜΑΣDžfiİ"; |
| let v = ['\u{307}', 'i', 'fi', 'dž', 'σ', 'α', 'μ', 'γ', 'ι', 'τ', 'σ', '💩', 'ü', 'ß', 'ö', 'a']; |
| |
| let mut pos = 0; |
| let it = s.chars().flat_map(|c| c.to_lowercase()).rev(); |
| |
| for c in it { |
| assert_eq!(c, v[pos]); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| } |
| |
| #[test] |
| fn test_to_uppercase_rev_iterator() { |
| let s = "aößü💩στιγμαςDžfiᾀ"; |
| let v = |
| ['Ι', 'Ἀ', 'I', 'F', 'DŽ', 'Σ', 'Α', 'Μ', 'Γ', 'Ι', 'Τ', 'Σ', '💩', 'Ü', 'S', 'S', 'Ö', 'A']; |
| |
| let mut pos = 0; |
| let it = s.chars().flat_map(|c| c.to_uppercase()).rev(); |
| |
| for c in it { |
| assert_eq!(c, v[pos]); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_chars_decoding() { |
| let mut bytes = [0; MAX_LEN_UTF8]; |
| for c in (0..0x110000).filter_map(std::char::from_u32) { |
| let s = c.encode_utf8(&mut bytes); |
| if Some(c) != s.chars().next() { |
| panic!("character {:x}={} does not decode correctly", c as u32, c); |
| } |
| } |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_chars_rev_decoding() { |
| let mut bytes = [0; MAX_LEN_UTF8]; |
| for c in (0..0x110000).filter_map(std::char::from_u32) { |
| let s = c.encode_utf8(&mut bytes); |
| if Some(c) != s.chars().rev().next() { |
| panic!("character {:x}={} does not decode correctly", c as u32, c); |
| } |
| } |
| } |
| |
| #[test] |
| fn test_iterator_clone() { |
| let s = "ศไทย中华Việt Nam"; |
| let mut it = s.chars(); |
| it.next(); |
| assert!(it.clone().zip(it).all(|(x, y)| x == y)); |
| } |
| |
| #[test] |
| fn test_iterator_last() { |
| let s = "ศไทย中华Việt Nam"; |
| let mut it = s.chars(); |
| it.next(); |
| assert_eq!(it.last(), Some('m')); |
| } |
| |
| #[test] |
| fn test_chars_debug() { |
| let s = "ศไทย中华Việt Nam"; |
| let c = s.chars(); |
| assert_eq!( |
| format!("{c:?}"), |
| r#"Chars(['ศ', 'ไ', 'ท', 'ย', '中', '华', 'V', 'i', 'ệ', 't', ' ', 'N', 'a', 'm'])"# |
| ); |
| } |
| |
| #[test] |
| fn test_bytesator() { |
| let s = "ศไทย中华Việt Nam"; |
| let v = [ |
| 224, 184, 168, 224, 185, 132, 224, 184, 151, 224, 184, 162, 228, 184, 173, 229, 141, 142, |
| 86, 105, 225, 187, 135, 116, 32, 78, 97, 109, |
| ]; |
| let mut pos = 0; |
| |
| for b in s.bytes() { |
| assert_eq!(b, v[pos]); |
| pos += 1; |
| } |
| } |
| |
| #[test] |
| fn test_bytes_revator() { |
| let s = "ศไทย中华Việt Nam"; |
| let v = [ |
| 224, 184, 168, 224, 185, 132, 224, 184, 151, 224, 184, 162, 228, 184, 173, 229, 141, 142, |
| 86, 105, 225, 187, 135, 116, 32, 78, 97, 109, |
| ]; |
| let mut pos = v.len(); |
| |
| for b in s.bytes().rev() { |
| pos -= 1; |
| assert_eq!(b, v[pos]); |
| } |
| } |
| |
| #[test] |
| fn test_bytesator_nth() { |
| let s = "ศไทย中华Việt Nam"; |
| let v = [ |
| 224, 184, 168, 224, 185, 132, 224, 184, 151, 224, 184, 162, 228, 184, 173, 229, 141, 142, |
| 86, 105, 225, 187, 135, 116, 32, 78, 97, 109, |
| ]; |
| |
| let mut b = s.bytes(); |
| assert_eq!(b.nth(2).unwrap(), v[2]); |
| assert_eq!(b.nth(10).unwrap(), v[10]); |
| assert_eq!(b.nth(200), None); |
| } |
| |
| #[test] |
| fn test_bytesator_count() { |
| let s = "ศไทย中华Việt Nam"; |
| |
| let b = s.bytes(); |
| assert_eq!(b.count(), 28) |
| } |
| |
| #[test] |
| fn test_bytesator_last() { |
| let s = "ศไทย中华Việt Nam"; |
| |
| let b = s.bytes(); |
| assert_eq!(b.last().unwrap(), 109) |
| } |
| |
| #[test] |
| fn test_char_indicesator() { |
| let s = "ศไทย中华Việt Nam"; |
| let p = [0, 3, 6, 9, 12, 15, 18, 19, 20, 23, 24, 25, 26, 27]; |
| let v = ['ศ', 'ไ', 'ท', 'ย', '中', '华', 'V', 'i', 'ệ', 't', ' ', 'N', 'a', 'm']; |
| |
| let mut pos = 0; |
| let it = s.char_indices(); |
| |
| for c in it { |
| assert_eq!(c, (p[pos], v[pos])); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| assert_eq!(pos, p.len()); |
| } |
| |
| #[test] |
| fn test_char_indices_revator() { |
| let s = "ศไทย中华Việt Nam"; |
| let p = [27, 26, 25, 24, 23, 20, 19, 18, 15, 12, 9, 6, 3, 0]; |
| let v = ['m', 'a', 'N', ' ', 't', 'ệ', 'i', 'V', '华', '中', 'ย', 'ท', 'ไ', 'ศ']; |
| |
| let mut pos = 0; |
| let it = s.char_indices().rev(); |
| |
| for c in it { |
| assert_eq!(c, (p[pos], v[pos])); |
| pos += 1; |
| } |
| assert_eq!(pos, v.len()); |
| assert_eq!(pos, p.len()); |
| } |
| |
| #[test] |
| fn test_char_indices_last() { |
| let s = "ศไทย中华Việt Nam"; |
| let mut it = s.char_indices(); |
| it.next(); |
| assert_eq!(it.last(), Some((27, 'm'))); |
| } |
| |
| #[test] |
| fn test_splitn_char_iterator() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.splitn(4, ' ').collect(); |
| assert_eq!(split, ["\nMäry", "häd", "ä", "little lämb\nLittle lämb\n"]); |
| |
| let split: Vec<&str> = data.splitn(4, |c: char| c == ' ').collect(); |
| assert_eq!(split, ["\nMäry", "häd", "ä", "little lämb\nLittle lämb\n"]); |
| |
| // Unicode |
| let split: Vec<&str> = data.splitn(4, 'ä').collect(); |
| assert_eq!(split, ["\nM", "ry h", "d ", " little lämb\nLittle lämb\n"]); |
| |
| let split: Vec<&str> = data.splitn(4, |c: char| c == 'ä').collect(); |
| assert_eq!(split, ["\nM", "ry h", "d ", " little lämb\nLittle lämb\n"]); |
| } |
| |
| #[test] |
| fn test_split_char_iterator_no_trailing() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.split('\n').collect(); |
| assert_eq!(split, ["", "Märy häd ä little lämb", "Little lämb", ""]); |
| |
| let split: Vec<&str> = data.split_terminator('\n').collect(); |
| assert_eq!(split, ["", "Märy häd ä little lämb", "Little lämb"]); |
| } |
| |
| #[test] |
| fn test_split_char_iterator_inclusive() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.split_inclusive('\n').collect(); |
| assert_eq!(split, ["\n", "Märy häd ä little lämb\n", "Little lämb\n"]); |
| |
| let uppercase_separated = "SheePSharKTurtlECaT"; |
| let mut first_char = true; |
| let split: Vec<&str> = uppercase_separated |
| .split_inclusive(|c: char| { |
| let split = !first_char && c.is_uppercase(); |
| first_char = split; |
| split |
| }) |
| .collect(); |
| assert_eq!(split, ["SheeP", "SharK", "TurtlE", "CaT"]); |
| } |
| |
| #[test] |
| fn test_split_char_iterator_inclusive_rev() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.split_inclusive('\n').rev().collect(); |
| assert_eq!(split, ["Little lämb\n", "Märy häd ä little lämb\n", "\n"]); |
| |
| // Note that the predicate is stateful and thus dependent |
| // on the iteration order. |
| // (A different predicate is needed for reverse iterator vs normal iterator.) |
| // Not sure if anything can be done though. |
| let uppercase_separated = "SheePSharKTurtlECaT"; |
| let mut term_char = true; |
| let split: Vec<&str> = uppercase_separated |
| .split_inclusive(|c: char| { |
| let split = term_char && c.is_uppercase(); |
| term_char = c.is_uppercase(); |
| split |
| }) |
| .rev() |
| .collect(); |
| assert_eq!(split, ["CaT", "TurtlE", "SharK", "SheeP"]); |
| } |
| |
| #[test] |
| fn test_rsplit() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.rsplit(' ').collect(); |
| assert_eq!(split, ["lämb\n", "lämb\nLittle", "little", "ä", "häd", "\nMäry"]); |
| |
| let split: Vec<&str> = data.rsplit("lämb").collect(); |
| assert_eq!(split, ["\n", "\nLittle ", "\nMäry häd ä little "]); |
| |
| let split: Vec<&str> = data.rsplit(|c: char| c == 'ä').collect(); |
| assert_eq!(split, ["mb\n", "mb\nLittle l", " little l", "d ", "ry h", "\nM"]); |
| } |
| |
| #[test] |
| fn test_rsplitn() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.rsplitn(2, ' ').collect(); |
| assert_eq!(split, ["lämb\n", "\nMäry häd ä little lämb\nLittle"]); |
| |
| let split: Vec<&str> = data.rsplitn(2, "lämb").collect(); |
| assert_eq!(split, ["\n", "\nMäry häd ä little lämb\nLittle "]); |
| |
| let split: Vec<&str> = data.rsplitn(2, |c: char| c == 'ä').collect(); |
| assert_eq!(split, ["mb\n", "\nMäry häd ä little lämb\nLittle l"]); |
| } |
| |
| #[test] |
| fn test_split_once() { |
| assert_eq!("".split_once("->"), None); |
| assert_eq!("-".split_once("->"), None); |
| assert_eq!("->".split_once("->"), Some(("", ""))); |
| assert_eq!("a->".split_once("->"), Some(("a", ""))); |
| assert_eq!("->b".split_once("->"), Some(("", "b"))); |
| assert_eq!("a->b".split_once("->"), Some(("a", "b"))); |
| assert_eq!("a->b->c".split_once("->"), Some(("a", "b->c"))); |
| assert_eq!("---".split_once("--"), Some(("", "-"))); |
| } |
| |
| #[test] |
| fn test_rsplit_once() { |
| assert_eq!("".rsplit_once("->"), None); |
| assert_eq!("-".rsplit_once("->"), None); |
| assert_eq!("->".rsplit_once("->"), Some(("", ""))); |
| assert_eq!("a->".rsplit_once("->"), Some(("a", ""))); |
| assert_eq!("->b".rsplit_once("->"), Some(("", "b"))); |
| assert_eq!("a->b".rsplit_once("->"), Some(("a", "b"))); |
| assert_eq!("a->b->c".rsplit_once("->"), Some(("a->b", "c"))); |
| assert_eq!("---".rsplit_once("--"), Some(("-", ""))); |
| } |
| |
| #[test] |
| fn test_split_whitespace() { |
| let data = "\n \tMäry häd\tä little lämb\nLittle lämb\n"; |
| let words: Vec<&str> = data.split_whitespace().collect(); |
| assert_eq!(words, ["Märy", "häd", "ä", "little", "lämb", "Little", "lämb"]) |
| } |
| |
| #[test] |
| fn test_lines() { |
| fn t(data: &str, expected: &[&str]) { |
| let lines: Vec<&str> = data.lines().collect(); |
| assert_eq!(lines, expected); |
| } |
| t("", &[]); |
| t("\n", &[""]); |
| t("\n2nd", &["", "2nd"]); |
| t("\r\n", &[""]); |
| t("bare\r", &["bare\r"]); |
| t("bare\rcr", &["bare\rcr"]); |
| t("Text\n\r", &["Text", "\r"]); |
| t( |
| "\nMäry häd ä little lämb\n\r\nLittle lämb\n", |
| &["", "Märy häd ä little lämb", "", "Little lämb"], |
| ); |
| t( |
| "\r\nMäry häd ä little lämb\n\nLittle lämb", |
| &["", "Märy häd ä little lämb", "", "Little lämb"], |
| ); |
| } |
| |
| #[test] |
| fn test_splitator() { |
| fn t(s: &str, sep: &str, u: &[&str]) { |
| let v: Vec<&str> = s.split(sep).collect(); |
| assert_eq!(v, u); |
| } |
| t("--1233345--", "12345", &["--1233345--"]); |
| t("abc::hello::there", "::", &["abc", "hello", "there"]); |
| t("::hello::there", "::", &["", "hello", "there"]); |
| t("hello::there::", "::", &["hello", "there", ""]); |
| t("::hello::there::", "::", &["", "hello", "there", ""]); |
| t("ประเทศไทย中华Việt Nam", "中华", &["ประเทศไทย", "Việt Nam"]); |
| t("zzXXXzzYYYzz", "zz", &["", "XXX", "YYY", ""]); |
| t("zzXXXzYYYz", "XXX", &["zz", "zYYYz"]); |
| t(".XXX.YYY.", ".", &["", "XXX", "YYY", ""]); |
| t("", ".", &[""]); |
| t("zz", "zz", &["", ""]); |
| t("ok", "z", &["ok"]); |
| t("zzz", "zz", &["", "z"]); |
| t("zzzzz", "zz", &["", "", "z"]); |
| } |
| |
| #[test] |
| fn test_str_default() { |
| use std::default::Default; |
| |
| fn t<S: Default + AsRef<str>>() { |
| let s: S = Default::default(); |
| assert_eq!(s.as_ref(), ""); |
| } |
| |
| t::<&str>(); |
| t::<String>(); |
| t::<&mut str>(); |
| } |
| |
| #[test] |
| fn test_str_container() { |
| fn sum_len(v: &[&str]) -> usize { |
| v.iter().map(|x| x.len()).sum() |
| } |
| |
| let s = "01234"; |
| assert_eq!(5, sum_len(&["012", "", "34"])); |
| assert_eq!(5, sum_len(&["01", "2", "34", ""])); |
| assert_eq!(5, sum_len(&[s])); |
| } |
| |
| #[test] |
| fn test_str_from_utf8() { |
| let xs = b"hello"; |
| assert_eq!(from_utf8(xs), Ok("hello")); |
| |
| let xs = "ศไทย中华Việt Nam".as_bytes(); |
| assert_eq!(from_utf8(xs), Ok("ศไทย中华Việt Nam")); |
| |
| let xs = b"hello\xFF"; |
| assert!(from_utf8(xs).is_err()); |
| } |
| |
| #[test] |
| fn test_pattern_deref_forward() { |
| let data = "aabcdaa"; |
| assert!(data.contains("bcd")); |
| assert!(data.contains(&"bcd")); |
| assert!(data.contains(&"bcd".to_string())); |
| } |
| |
| #[test] |
| fn test_empty_match_indices() { |
| let data = "aä中!"; |
| let vec: Vec<_> = data.match_indices("").collect(); |
| assert_eq!(vec, [(0, ""), (1, ""), (3, ""), (6, ""), (7, "")]); |
| } |
| |
| #[test] |
| fn test_bool_from_str() { |
| assert_eq!("true".parse().ok(), Some(true)); |
| assert_eq!("false".parse().ok(), Some(false)); |
| assert_eq!("not even a boolean".parse::<bool>().ok(), None); |
| } |
| |
| fn check_contains_all_substrings(haystack: &str) { |
| let mut modified_needle = String::new(); |
| |
| for i in 0..haystack.len() { |
| // check different haystack lengths since we special-case short haystacks. |
| let haystack = &haystack[0..i]; |
| assert!(haystack.contains("")); |
| for j in 0..haystack.len() { |
| for k in j + 1..=haystack.len() { |
| let needle = &haystack[j..k]; |
| assert!(haystack.contains(needle)); |
| modified_needle.clear(); |
| modified_needle.push_str(needle); |
| modified_needle.replace_range(0..1, "\0"); |
| assert!(!haystack.contains(&modified_needle)); |
| |
| modified_needle.clear(); |
| modified_needle.push_str(needle); |
| modified_needle.replace_range(needle.len() - 1..needle.len(), "\0"); |
| assert!(!haystack.contains(&modified_needle)); |
| } |
| } |
| } |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn strslice_issue_16589() { |
| assert!("bananas".contains("nana")); |
| |
| // prior to the fix for #16589, x.contains("abcdabcd") returned false |
| // test all substrings for good measure |
| check_contains_all_substrings("012345678901234567890123456789bcdabcdabcd"); |
| } |
| |
| #[test] |
| fn strslice_issue_16878() { |
| assert!(!"1234567ah012345678901ah".contains("hah")); |
| assert!(!"00abc01234567890123456789abc".contains("bcabc")); |
| } |
| |
| #[test] |
| fn strslice_issue_104726() { |
| // Edge-case in the simd_contains impl. |
| // The first and last byte are the same so it backtracks by one byte |
| // which aligns with the end of the string. Previously incorrect offset calculations |
| // lead to out-of-bounds slicing. |
| #[rustfmt::skip] |
| let needle = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaba"; |
| let haystack = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab"; |
| assert!(!haystack.contains(needle)); |
| } |
| |
| #[test] |
| #[cfg_attr(miri, ignore)] // Miri is too slow |
| fn test_strslice_contains() { |
| let x = "There are moments, Jeeves, when one asks oneself, 'Do trousers matter?'"; |
| check_contains_all_substrings(x); |
| } |
| |
| #[test] |
| fn test_rsplitn_char_iterator() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let mut split: Vec<&str> = data.rsplitn(4, ' ').collect(); |
| split.reverse(); |
| assert_eq!(split, ["\nMäry häd ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| let mut split: Vec<&str> = data.rsplitn(4, |c: char| c == ' ').collect(); |
| split.reverse(); |
| assert_eq!(split, ["\nMäry häd ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| // Unicode |
| let mut split: Vec<&str> = data.rsplitn(4, 'ä').collect(); |
| split.reverse(); |
| assert_eq!(split, ["\nMäry häd ", " little l", "mb\nLittle l", "mb\n"]); |
| |
| let mut split: Vec<&str> = data.rsplitn(4, |c: char| c == 'ä').collect(); |
| split.reverse(); |
| assert_eq!(split, ["\nMäry häd ", " little l", "mb\nLittle l", "mb\n"]); |
| } |
| |
| #[test] |
| fn test_split_char_iterator() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let split: Vec<&str> = data.split(' ').collect(); |
| assert_eq!(split, ["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| let mut rsplit: Vec<&str> = data.split(' ').rev().collect(); |
| rsplit.reverse(); |
| assert_eq!(rsplit, ["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| let split: Vec<&str> = data.split(|c: char| c == ' ').collect(); |
| assert_eq!(split, ["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| let mut rsplit: Vec<&str> = data.split(|c: char| c == ' ').rev().collect(); |
| rsplit.reverse(); |
| assert_eq!(rsplit, ["\nMäry", "häd", "ä", "little", "lämb\nLittle", "lämb\n"]); |
| |
| // Unicode |
| let split: Vec<&str> = data.split('ä').collect(); |
| assert_eq!(split, ["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]); |
| |
| let mut rsplit: Vec<&str> = data.split('ä').rev().collect(); |
| rsplit.reverse(); |
| assert_eq!(rsplit, ["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]); |
| |
| let split: Vec<&str> = data.split(|c: char| c == 'ä').collect(); |
| assert_eq!(split, ["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]); |
| |
| let mut rsplit: Vec<&str> = data.split(|c: char| c == 'ä').rev().collect(); |
| rsplit.reverse(); |
| assert_eq!(rsplit, ["\nM", "ry h", "d ", " little l", "mb\nLittle l", "mb\n"]); |
| } |
| |
| #[test] |
| fn test_rev_split_char_iterator_no_trailing() { |
| let data = "\nMäry häd ä little lämb\nLittle lämb\n"; |
| |
| let mut split: Vec<&str> = data.split('\n').rev().collect(); |
| split.reverse(); |
| assert_eq!(split, ["", "Märy häd ä little lämb", "Little lämb", ""]); |
| |
| let mut split: Vec<&str> = data.split_terminator('\n').rev().collect(); |
| split.reverse(); |
| assert_eq!(split, ["", "Märy häd ä little lämb", "Little lämb"]); |
| } |
| |
| #[test] |
| fn test_utf16_code_units() { |
| assert_eq!("é\u{1F4A9}".encode_utf16().collect::<Vec<u16>>(), [0xE9, 0xD83D, 0xDCA9]) |
| } |
| |
| #[test] |
| fn test_utf16_size_hint() { |
| assert_eq!("".encode_utf16().size_hint(), (0, Some(0))); |
| assert_eq!("123".encode_utf16().size_hint(), (1, Some(3))); |
| assert_eq!("1234".encode_utf16().size_hint(), (2, Some(4))); |
| assert_eq!("12345678".encode_utf16().size_hint(), (3, Some(8))); |
| |
| fn hint_vec(src: &str) -> Vec<(usize, Option<usize>)> { |
| let mut it = src.encode_utf16(); |
| let mut result = Vec::new(); |
| result.push(it.size_hint()); |
| while it.next().is_some() { |
| result.push(it.size_hint()) |
| } |
| result |
| } |
| |
| assert_eq!(hint_vec("12"), [(1, Some(2)), (1, Some(1)), (0, Some(0))]); |
| assert_eq!(hint_vec("\u{101234}"), [(2, Some(4)), (1, Some(1)), (0, Some(0))]); |
| assert_eq!(hint_vec("\u{101234}a"), [(2, Some(5)), (2, Some(2)), (1, Some(1)), (0, Some(0))]); |
| } |
| |
| #[test] |
| fn starts_with_in_unicode() { |
| assert!(!"├── Cargo.toml".starts_with("# ")); |
| } |
| |
| #[test] |
| fn starts_short_long() { |
| assert!(!"".starts_with("##")); |
| assert!(!"##".starts_with("####")); |
| assert!("####".starts_with("##")); |
| assert!(!"##ä".starts_with("####")); |
| assert!("####ä".starts_with("##")); |
| assert!(!"##".starts_with("####ä")); |
| assert!("##ä##".starts_with("##ä")); |
| |
| assert!("".starts_with("")); |
| assert!("ä".starts_with("")); |
| assert!("#ä".starts_with("")); |
| assert!("##ä".starts_with("")); |
| assert!("ä###".starts_with("")); |
| assert!("#ä##".starts_with("")); |
| assert!("##ä#".starts_with("")); |
| } |
| |
| #[test] |
| fn contains_weird_cases() { |
| assert!("* \t".contains(' ')); |
| assert!(!"* \t".contains('?')); |
| assert!(!"* \t".contains('\u{1F4A9}')); |
| } |
| |
| #[test] |
| fn trim_ws() { |
| assert_eq!(" \t a \t ".trim_start_matches(|c: char| c.is_whitespace()), "a \t "); |
| assert_eq!(" \t a \t ".trim_end_matches(|c: char| c.is_whitespace()), " \t a"); |
| assert_eq!(" \t a \t ".trim_start_matches(|c: char| c.is_whitespace()), "a \t "); |
| assert_eq!(" \t a \t ".trim_end_matches(|c: char| c.is_whitespace()), " \t a"); |
| assert_eq!(" \t a \t ".trim_matches(|c: char| c.is_whitespace()), "a"); |
| assert_eq!(" \t \t ".trim_start_matches(|c: char| c.is_whitespace()), ""); |
| assert_eq!(" \t \t ".trim_end_matches(|c: char| c.is_whitespace()), ""); |
| assert_eq!(" \t \t ".trim_start_matches(|c: char| c.is_whitespace()), ""); |
| assert_eq!(" \t \t ".trim_end_matches(|c: char| c.is_whitespace()), ""); |
| assert_eq!(" \t \t ".trim_matches(|c: char| c.is_whitespace()), ""); |
| } |
| |
| #[test] |
| fn to_lowercase() { |
| assert_eq!("".to_lowercase(), ""); |
| assert_eq!("AÉDžaé ".to_lowercase(), "aédžaé "); |
| |
| // https://github.com/rust-lang/rust/issues/26035 |
| assert_eq!("ΑΣ".to_lowercase(), "ας"); |
| assert_eq!("Α'Σ".to_lowercase(), "α'ς"); |
| assert_eq!("Α''Σ".to_lowercase(), "α''ς"); |
| |
| assert_eq!("ΑΣ Α".to_lowercase(), "ας α"); |
| assert_eq!("Α'Σ Α".to_lowercase(), "α'ς α"); |
| assert_eq!("Α''Σ Α".to_lowercase(), "α''ς α"); |
| |
| assert_eq!("ΑΣ' Α".to_lowercase(), "ας' α"); |
| assert_eq!("ΑΣ'' Α".to_lowercase(), "ας'' α"); |
| |
| assert_eq!("Α'Σ' Α".to_lowercase(), "α'ς' α"); |
| assert_eq!("Α''Σ'' Α".to_lowercase(), "α''ς'' α"); |
| |
| assert_eq!("Α Σ".to_lowercase(), "α σ"); |
| assert_eq!("Α 'Σ".to_lowercase(), "α 'σ"); |
| assert_eq!("Α ''Σ".to_lowercase(), "α ''σ"); |
| |
| assert_eq!("Σ".to_lowercase(), "σ"); |
| assert_eq!("'Σ".to_lowercase(), "'σ"); |
| assert_eq!("''Σ".to_lowercase(), "''σ"); |
| |
| assert_eq!("ΑΣΑ".to_lowercase(), "ασα"); |
| assert_eq!("ΑΣ'Α".to_lowercase(), "ασ'α"); |
| assert_eq!("ΑΣ''Α".to_lowercase(), "ασ''α"); |
| |
| // https://github.com/rust-lang/rust/issues/124714 |
| // input lengths around the boundary of the chunk size used by the ascii prefix optimization |
| assert_eq!("abcdefghijklmnoΣ".to_lowercase(), "abcdefghijklmnoς"); |
| assert_eq!("abcdefghijklmnopΣ".to_lowercase(), "abcdefghijklmnopς"); |
| assert_eq!("abcdefghijklmnopqΣ".to_lowercase(), "abcdefghijklmnopqς"); |
| |
| // a really long string that has it's lowercase form |
| // even longer. this tests that implementations don't assume |
| // an incorrect upper bound on allocations |
| let upper = str::repeat("İ", 512); |
| let lower = str::repeat("i̇", 512); |
| assert_eq!(upper.to_lowercase(), lower); |
| |
| // a really long ascii-only string. |
| // This test that the ascii hot-path |
| // functions correctly |
| let upper = str::repeat("A", 511); |
| let lower = str::repeat("a", 511); |
| assert_eq!(upper.to_lowercase(), lower); |
| } |
| |
| #[test] |
| fn to_uppercase() { |
| assert_eq!("".to_uppercase(), ""); |
| assert_eq!("aéDžßfiᾀ".to_uppercase(), "AÉDŽSSFIἈΙ"); |
| } |
| |
| #[test] |
| fn test_into_string() { |
| // The only way to acquire a Box<str> in the first place is through a String, so just |
| // test that we can round-trip between Box<str> and String. |
| let string = String::from("Some text goes here"); |
| assert_eq!(string.clone().into_boxed_str().into_string(), string); |
| } |
| |
| #[test] |
| fn test_box_slice_clone() { |
| let data = String::from("hello HELLO hello HELLO yes YES 5 中ä华!!!"); |
| let data2 = data.clone().into_boxed_str().clone().into_string(); |
| |
| assert_eq!(data, data2); |
| } |
| |
| #[test] |
| fn test_cow_from() { |
| let borrowed = "borrowed"; |
| let owned = String::from("owned"); |
| match (Cow::from(owned.clone()), Cow::from(borrowed)) { |
| (Cow::Owned(o), Cow::Borrowed(b)) => assert!(o == owned && b == borrowed), |
| _ => panic!("invalid `Cow::from`"), |
| } |
| } |
| |
| #[test] |
| fn test_repeat() { |
| assert_eq!("".repeat(3), ""); |
| assert_eq!("abc".repeat(0), ""); |
| assert_eq!("α".repeat(3), "ααα"); |
| } |
| |
| mod pattern { |
| use std::str::pattern::SearchStep::{self, Done, Match, Reject}; |
| use std::str::pattern::{Pattern, ReverseSearcher, Searcher}; |
| |
| macro_rules! make_test { |
| ($name:ident, $p:expr, $h:expr, [$($e:expr,)*]) => { |
| #[allow(unused_imports)] |
| mod $name { |
| use std::str::pattern::SearchStep::{Match, Reject}; |
| use super::{cmp_search_to_vec}; |
| #[test] |
| fn fwd() { |
| cmp_search_to_vec(false, $p, $h, vec![$($e),*]); |
| } |
| #[test] |
| fn bwd() { |
| cmp_search_to_vec(true, $p, $h, vec![$($e),*]); |
| } |
| } |
| } |
| } |
| |
| fn cmp_search_to_vec<P>(rev: bool, pat: P, haystack: &str, right: Vec<SearchStep>) |
| where |
| P: for<'a> Pattern<Searcher<'a>: ReverseSearcher<'a>>, |
| { |
| let mut searcher = pat.into_searcher(haystack); |
| let mut v = vec![]; |
| loop { |
| match if !rev { searcher.next() } else { searcher.next_back() } { |
| Match(a, b) => v.push(Match(a, b)), |
| Reject(a, b) => v.push(Reject(a, b)), |
| Done => break, |
| } |
| } |
| if rev { |
| v.reverse(); |
| } |
| |
| let mut first_index = 0; |
| let mut err = None; |
| |
| for (i, e) in right.iter().enumerate() { |
| match *e { |
| Match(a, b) | Reject(a, b) if a <= b && a == first_index => { |
| first_index = b; |
| } |
| _ => { |
| err = Some(i); |
| break; |
| } |
| } |
| } |
| |
| if let Some(err) = err { |
| panic!("Input skipped range at {err}"); |
| } |
| |
| if first_index != haystack.len() { |
| panic!("Did not cover whole input"); |
| } |
| |
| assert_eq!(v, right); |
| } |
| |
| make_test!( |
| str_searcher_ascii_haystack, |
| "bb", |
| "abbcbbd", |
| [Reject(0, 1), Match(1, 3), Reject(3, 4), Match(4, 6), Reject(6, 7),] |
| ); |
| make_test!( |
| str_searcher_ascii_haystack_seq, |
| "bb", |
| "abbcbbbbd", |
| [Reject(0, 1), Match(1, 3), Reject(3, 4), Match(4, 6), Match(6, 8), Reject(8, 9),] |
| ); |
| make_test!( |
| str_searcher_empty_needle_ascii_haystack, |
| "", |
| "abbcbbd", |
| [ |
| Match(0, 0), |
| Reject(0, 1), |
| Match(1, 1), |
| Reject(1, 2), |
| Match(2, 2), |
| Reject(2, 3), |
| Match(3, 3), |
| Reject(3, 4), |
| Match(4, 4), |
| Reject(4, 5), |
| Match(5, 5), |
| Reject(5, 6), |
| Match(6, 6), |
| Reject(6, 7), |
| Match(7, 7), |
| ] |
| ); |
| make_test!( |
| str_searcher_multibyte_haystack, |
| " ", |
| "├──", |
| [Reject(0, 3), Reject(3, 6), Reject(6, 9),] |
| ); |
| make_test!( |
| str_searcher_empty_needle_multibyte_haystack, |
| "", |
| "├──", |
| [ |
| Match(0, 0), |
| Reject(0, 3), |
| Match(3, 3), |
| Reject(3, 6), |
| Match(6, 6), |
| Reject(6, 9), |
| Match(9, 9), |
| ] |
| ); |
| make_test!(str_searcher_empty_needle_empty_haystack, "", "", [Match(0, 0),]); |
| make_test!(str_searcher_nonempty_needle_empty_haystack, "├", "", []); |
| make_test!( |
| char_searcher_ascii_haystack, |
| 'b', |
| "abbcbbd", |
| [ |
| Reject(0, 1), |
| Match(1, 2), |
| Match(2, 3), |
| Reject(3, 4), |
| Match(4, 5), |
| Match(5, 6), |
| Reject(6, 7), |
| ] |
| ); |
| make_test!( |
| char_searcher_multibyte_haystack, |
| ' ', |
| "├──", |
| [Reject(0, 3), Reject(3, 6), Reject(6, 9),] |
| ); |
| make_test!( |
| char_searcher_short_haystack, |
| '\u{1F4A9}', |
| "* \t", |
| [Reject(0, 1), Reject(1, 2), Reject(2, 3),] |
| ); |
| |
| // See #85462 |
| #[test] |
| fn str_searcher_empty_needle_after_done() { |
| // Empty needle and haystack |
| { |
| let mut searcher = "".into_searcher(""); |
| |
| assert_eq!(searcher.next(), SearchStep::Match(0, 0)); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| |
| let mut searcher = "".into_searcher(""); |
| |
| assert_eq!(searcher.next_back(), SearchStep::Match(0, 0)); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| } |
| // Empty needle and non-empty haystack |
| { |
| let mut searcher = "".into_searcher("a"); |
| |
| assert_eq!(searcher.next(), SearchStep::Match(0, 0)); |
| assert_eq!(searcher.next(), SearchStep::Reject(0, 1)); |
| assert_eq!(searcher.next(), SearchStep::Match(1, 1)); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| assert_eq!(searcher.next(), SearchStep::Done); |
| |
| let mut searcher = "".into_searcher("a"); |
| |
| assert_eq!(searcher.next_back(), SearchStep::Match(1, 1)); |
| assert_eq!(searcher.next_back(), SearchStep::Reject(0, 1)); |
| assert_eq!(searcher.next_back(), SearchStep::Match(0, 0)); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| assert_eq!(searcher.next_back(), SearchStep::Done); |
| } |
| } |
| } |
| |
| macro_rules! generate_iterator_test { |
| { |
| $name:ident { |
| $( |
| ($($arg:expr),*) -> [$($t:tt)*]; |
| )* |
| } |
| with $fwd:expr, $bwd:expr; |
| } => { |
| #[test] |
| fn $name() { |
| $( |
| { |
| let res = vec![$($t)*]; |
| |
| let fwd_vec: Vec<_> = ($fwd)($($arg),*).collect(); |
| assert_eq!(fwd_vec, res); |
| |
| let mut bwd_vec: Vec<_> = ($bwd)($($arg),*).collect(); |
| bwd_vec.reverse(); |
| assert_eq!(bwd_vec, res); |
| } |
| )* |
| } |
| }; |
| { |
| $name:ident { |
| $( |
| ($($arg:expr),*) -> [$($t:tt)*]; |
| )* |
| } |
| with $fwd:expr; |
| } => { |
| #[test] |
| fn $name() { |
| $( |
| { |
| let res = vec![$($t)*]; |
| |
| let fwd_vec: Vec<_> = ($fwd)($($arg),*).collect(); |
| assert_eq!(fwd_vec, res); |
| } |
| )* |
| } |
| } |
| } |
| |
| generate_iterator_test! { |
| double_ended_split { |
| ("foo.bar.baz", '.') -> ["foo", "bar", "baz"]; |
| ("foo::bar::baz", "::") -> ["foo", "bar", "baz"]; |
| } |
| with str::split, str::rsplit; |
| } |
| |
| generate_iterator_test! { |
| double_ended_split_terminator { |
| ("foo;bar;baz;", ';') -> ["foo", "bar", "baz"]; |
| } |
| with str::split_terminator, str::rsplit_terminator; |
| } |
| |
| generate_iterator_test! { |
| double_ended_matches { |
| ("a1b2c3", char::is_numeric) -> ["1", "2", "3"]; |
| } |
| with str::matches, str::rmatches; |
| } |
| |
| generate_iterator_test! { |
| double_ended_match_indices { |
| ("a1b2c3", char::is_numeric) -> [(1, "1"), (3, "2"), (5, "3")]; |
| } |
| with str::match_indices, str::rmatch_indices; |
| } |
| |
| generate_iterator_test! { |
| not_double_ended_splitn { |
| ("foo::bar::baz", 2, "::") -> ["foo", "bar::baz"]; |
| } |
| with str::splitn; |
| } |
| |
| generate_iterator_test! { |
| not_double_ended_rsplitn { |
| ("foo::bar::baz", 2, "::") -> ["baz", "foo::bar"]; |
| } |
| with str::rsplitn; |
| } |
| |
| #[test] |
| fn different_str_pattern_forwarding_lifetimes() { |
| use std::str::pattern::Pattern; |
| |
| fn foo<P>(p: P) |
| where |
| for<'b> &'b P: Pattern, |
| { |
| for _ in 0..3 { |
| "asdf".find(&p); |
| } |
| } |
| |
| foo::<&str>("x"); |
| } |
| |
| #[test] |
| fn test_str_multiline() { |
| let a: String = "this \ |
| is a test" |
| .to_string(); |
| let b: String = "this \ |
| is \ |
| another \ |
| test" |
| .to_string(); |
| assert_eq!(a, "this is a test".to_string()); |
| assert_eq!(b, "this is another test".to_string()); |
| } |
| |
| #[test] |
| fn test_str_escapes() { |
| let x = "\\\\\ |
| "; |
| assert_eq!(x, r"\\"); // extraneous whitespace stripped |
| } |
| |
| #[test] |
| fn const_str_ptr() { |
| const A: [u8; 2] = ['h' as u8, 'i' as u8]; |
| const B: &'static [u8; 2] = &A; |
| const C: *const u8 = B as *const u8; |
| |
| // Miri does not deduplicate consts (https://github.com/rust-lang/miri/issues/131) |
| #[cfg(not(miri))] |
| { |
| let foo = &A as *const u8; |
| assert_eq!(foo, C); |
| } |
| |
| unsafe { |
| assert_eq!(from_utf8_unchecked(&A), "hi"); |
| assert_eq!(*C, A[0]); |
| assert_eq!(*(&B[0] as *const u8), A[0]); |
| } |
| } |
| |
| #[test] |
| fn utf8() { |
| let yen: char = '¥'; // 0xa5 |
| let c_cedilla: char = 'ç'; // 0xe7 |
| let thorn: char = 'þ'; // 0xfe |
| let y_diaeresis: char = 'ÿ'; // 0xff |
| let pi: char = 'Π'; // 0x3a0 |
| |
| assert_eq!(yen as isize, 0xa5); |
| assert_eq!(c_cedilla as isize, 0xe7); |
| assert_eq!(thorn as isize, 0xfe); |
| assert_eq!(y_diaeresis as isize, 0xff); |
| assert_eq!(pi as isize, 0x3a0); |
| |
| assert_eq!(pi as isize, '\u{3a0}' as isize); |
| assert_eq!('\x0a' as isize, '\n' as isize); |
| |
| let bhutan: String = "འབྲུག་ཡུལ།".to_string(); |
| let japan: String = "日本".to_string(); |
| let uzbekistan: String = "Ўзбекистон".to_string(); |
| let austria: String = "Österreich".to_string(); |
| |
| let bhutan_e: String = |
| "\u{f60}\u{f56}\u{fb2}\u{f74}\u{f42}\u{f0b}\u{f61}\u{f74}\u{f63}\u{f0d}".to_string(); |
| let japan_e: String = "\u{65e5}\u{672c}".to_string(); |
| let uzbekistan_e: String = |
| "\u{40e}\u{437}\u{431}\u{435}\u{43a}\u{438}\u{441}\u{442}\u{43e}\u{43d}".to_string(); |
| let austria_e: String = "\u{d6}sterreich".to_string(); |
| |
| let oo: char = 'Ö'; |
| assert_eq!(oo as isize, 0xd6); |
| |
| fn check_str_eq(a: String, b: String) { |
| let mut i: isize = 0; |
| for ab in a.bytes() { |
| println!("{i}"); |
| println!("{ab}"); |
| let bb: u8 = b.as_bytes()[i as usize]; |
| println!("{bb}"); |
| assert_eq!(ab, bb); |
| i += 1; |
| } |
| } |
| |
| check_str_eq(bhutan, bhutan_e); |
| check_str_eq(japan, japan_e); |
| check_str_eq(uzbekistan, uzbekistan_e); |
| check_str_eq(austria, austria_e); |
| } |
| |
| #[test] |
| fn utf8_chars() { |
| // Chars of 1, 2, 3, and 4 bytes |
| let chs: Vec<char> = vec!['e', 'é', '€', '\u{10000}']; |
| let s: String = chs.iter().cloned().collect(); |
| let schs: Vec<char> = s.chars().collect(); |
| |
| assert_eq!(s.len(), 10); |
| assert_eq!(s.chars().count(), 4); |
| assert_eq!(schs.len(), 4); |
| assert_eq!(schs.iter().cloned().collect::<String>(), s); |
| |
| assert!(from_utf8(s.as_bytes()).is_ok()); |
| // invalid prefix |
| assert!(!from_utf8(&[0x80]).is_ok()); |
| // invalid 2 byte prefix |
| assert!(!from_utf8(&[0xc0]).is_ok()); |
| assert!(!from_utf8(&[0xc0, 0x10]).is_ok()); |
| // invalid 3 byte prefix |
| assert!(!from_utf8(&[0xe0]).is_ok()); |
| assert!(!from_utf8(&[0xe0, 0x10]).is_ok()); |
| assert!(!from_utf8(&[0xe0, 0xff, 0x10]).is_ok()); |
| // invalid 4 byte prefix |
| assert!(!from_utf8(&[0xf0]).is_ok()); |
| assert!(!from_utf8(&[0xf0, 0x10]).is_ok()); |
| assert!(!from_utf8(&[0xf0, 0xff, 0x10]).is_ok()); |
| assert!(!from_utf8(&[0xf0, 0xff, 0xff, 0x10]).is_ok()); |
| } |
| |
| #[test] |
| fn utf8_char_counts() { |
| let strs = [("e", 1), ("é", 1), ("€", 1), ("\u{10000}", 1), ("eé€\u{10000}", 4)]; |
| let spread = if cfg!(miri) { 4 } else { 8 }; |
| let mut reps = [8, 64, 256, 512] |
| .iter() |
| .copied() |
| .flat_map(|n| n - spread..=n + spread) |
| .collect::<Vec<usize>>(); |
| if cfg!(not(miri)) { |
| reps.extend([1024, 1 << 16].iter().copied().flat_map(|n| n - spread..=n + spread)); |
| } |
| let counts = if cfg!(miri) { 0..1 } else { 0..8 }; |
| let padding = counts.map(|len| " ".repeat(len)).collect::<Vec<String>>(); |
| |
| for repeat in reps { |
| for (tmpl_str, tmpl_char_count) in strs { |
| for pad_start in &padding { |
| for pad_end in &padding { |
| // Create a string with padding... |
| let with_padding = |
| format!("{}{}{}", pad_start, tmpl_str.repeat(repeat), pad_end); |
| // ...and then skip past that padding. This should ensure |
| // that we test several different alignments for both head |
| // and tail. |
| let si = pad_start.len(); |
| let ei = with_padding.len() - pad_end.len(); |
| let target = &with_padding[si..ei]; |
| |
| assert!(!target.starts_with(" ") && !target.ends_with(" ")); |
| let expected_count = tmpl_char_count * repeat; |
| assert_eq!( |
| expected_count, |
| target.chars().count(), |
| "wrong count for `{:?}.repeat({})` (padding: `{:?}`)", |
| tmpl_str, |
| repeat, |
| (pad_start.len(), pad_end.len()), |
| ); |
| } |
| } |
| } |
| } |
| } |
| |
| #[test] |
| fn floor_char_boundary() { |
| fn check_many(s: &str, arg: impl IntoIterator<Item = usize>, ret: usize) { |
| for idx in arg { |
| assert_eq!( |
| s.floor_char_boundary(idx), |
| ret, |
| "{:?}.floor_char_boundary({:?}) != {:?}", |
| s, |
| idx, |
| ret |
| ); |
| } |
| } |
| |
| // edge case |
| check_many("", [0, 1, isize::MAX as usize, usize::MAX], 0); |
| |
| // basic check |
| check_many("x", [0], 0); |
| check_many("x", [1, isize::MAX as usize, usize::MAX], 1); |
| |
| // 1-byte chars |
| check_many("jp", [0], 0); |
| check_many("jp", [1], 1); |
| check_many("jp", 2..4, 2); |
| |
| // 2-byte chars |
| check_many("ĵƥ", 0..2, 0); |
| check_many("ĵƥ", 2..4, 2); |
| check_many("ĵƥ", 4..6, 4); |
| |
| // 3-byte chars |
| check_many("日本", 0..3, 0); |
| check_many("日本", 3..6, 3); |
| check_many("日本", 6..8, 6); |
| |
| // 4-byte chars |
| check_many("🇯🇵", 0..4, 0); |
| check_many("🇯🇵", 4..8, 4); |
| check_many("🇯🇵", 8..10, 8); |
| } |
| |
| #[test] |
| fn ceil_char_boundary() { |
| fn check_many(s: &str, arg: impl IntoIterator<Item = usize>, ret: usize) { |
| for idx in arg { |
| assert_eq!( |
| s.ceil_char_boundary(idx), |
| ret, |
| "{:?}.ceil_char_boundary({:?}) != {:?}", |
| s, |
| idx, |
| ret |
| ); |
| } |
| } |
| |
| // edge case |
| check_many("", [0], 0); |
| |
| // basic check |
| check_many("x", [0], 0); |
| check_many("x", [1], 1); |
| |
| // 1-byte chars |
| check_many("jp", [0], 0); |
| check_many("jp", [1], 1); |
| check_many("jp", [2], 2); |
| |
| // 2-byte chars |
| check_many("ĵƥ", 0..=0, 0); |
| check_many("ĵƥ", 1..=2, 2); |
| check_many("ĵƥ", 3..=4, 4); |
| |
| // 3-byte chars |
| check_many("日本", 0..=0, 0); |
| check_many("日本", 1..=3, 3); |
| check_many("日本", 4..=6, 6); |
| |
| // 4-byte chars |
| check_many("🇯🇵", 0..=0, 0); |
| check_many("🇯🇵", 1..=4, 4); |
| check_many("🇯🇵", 5..=8, 8); |
| |
| // above len |
| check_many("hello", 5..=10, 5); |
| } |
