2424 lines
74 KiB
Rust
2424 lines
74 KiB
Rust
use std::assert_matches::assert_matches;
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use std::borrow::Cow;
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use std::cmp::Ordering::{Equal, Greater, Less};
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use std::str::{from_utf8, from_utf8_unchecked};
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#[test]
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fn test_le() {
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assert!("" <= "");
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assert!("" <= "foo");
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assert!("foo" <= "foo");
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assert_ne!("foo", "bar");
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}
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#[test]
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fn test_find() {
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assert_eq!("hello".find('l'), Some(2));
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assert_eq!("hello".find(|c: char| c == 'o'), Some(4));
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assert!("hello".find('x').is_none());
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assert!("hello".find(|c: char| c == 'x').is_none());
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assert_eq!("ประเทศไทย中华Việt Nam".find('华'), Some(30));
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assert_eq!("ประเทศไทย中华Việt Nam".find(|c: char| c == '华'), Some(30));
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}
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#[test]
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fn test_rfind() {
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assert_eq!("hello".rfind('l'), Some(3));
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assert_eq!("hello".rfind(|c: char| c == 'o'), Some(4));
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assert!("hello".rfind('x').is_none());
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assert!("hello".rfind(|c: char| c == 'x').is_none());
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assert_eq!("ประเทศไทย中华Việt Nam".rfind('华'), Some(30));
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assert_eq!("ประเทศไทย中华Việt Nam".rfind(|c: char| c == '华'), Some(30));
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}
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#[test]
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fn test_collect() {
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let empty = "";
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let s: String = empty.chars().collect();
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assert_eq!(empty, s);
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let data = "ประเทศไทย中";
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let s: String = data.chars().collect();
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assert_eq!(data, s);
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}
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#[test]
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fn test_into_bytes() {
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let data = String::from("asdf");
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let buf = data.into_bytes();
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assert_eq!(buf, b"asdf");
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}
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#[test]
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fn test_find_str() {
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// byte positions
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assert_eq!("".find(""), Some(0));
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assert!("banana".find("apple pie").is_none());
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let data = "abcabc";
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assert_eq!(data[0..6].find("ab"), Some(0));
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assert_eq!(data[2..6].find("ab"), Some(3 - 2));
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assert!(data[2..4].find("ab").is_none());
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let string = "ประเทศไทย中华Việt Nam";
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let mut data = String::from(string);
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data.push_str(string);
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assert!(data.find("ไท华").is_none());
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assert_eq!(data[0..43].find(""), Some(0));
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assert_eq!(data[6..43].find(""), Some(6 - 6));
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assert_eq!(data[0..43].find("ประ"), Some(0));
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assert_eq!(data[0..43].find("ทศไ"), Some(12));
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assert_eq!(data[0..43].find("ย中"), Some(24));
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assert_eq!(data[0..43].find("iệt"), Some(34));
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assert_eq!(data[0..43].find("Nam"), Some(40));
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assert_eq!(data[43..86].find("ประ"), Some(43 - 43));
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assert_eq!(data[43..86].find("ทศไ"), Some(55 - 43));
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assert_eq!(data[43..86].find("ย中"), Some(67 - 43));
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assert_eq!(data[43..86].find("iệt"), Some(77 - 43));
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assert_eq!(data[43..86].find("Nam"), Some(83 - 43));
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// find every substring -- assert that it finds it, or an earlier occurrence.
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let string = "Việt Namacbaabcaabaaba";
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for (i, ci) in string.char_indices() {
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let ip = i + ci.len_utf8();
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for j in string[ip..].char_indices().map(|(i, _)| i).chain(Some(string.len() - ip)) {
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let pat = &string[i..ip + j];
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assert!(match string.find(pat) {
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None => false,
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Some(x) => x <= i,
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});
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assert!(match string.rfind(pat) {
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None => false,
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Some(x) => x >= i,
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});
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}
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}
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}
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fn s(x: &str) -> String {
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x.to_string()
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}
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macro_rules! test_concat {
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($expected: expr, $string: expr) => {{
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let s: String = $string.concat();
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assert_eq!($expected, s);
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}};
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}
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#[test]
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fn test_concat_for_different_types() {
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test_concat!("ab", vec![s("a"), s("b")]);
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test_concat!("ab", vec!["a", "b"]);
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}
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#[test]
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fn test_concat_for_different_lengths() {
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let empty: &[&str] = &[];
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test_concat!("", empty);
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test_concat!("a", ["a"]);
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test_concat!("ab", ["a", "b"]);
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test_concat!("abc", ["", "a", "bc"]);
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}
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macro_rules! test_join {
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($expected: expr, $string: expr, $delim: expr) => {{
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let s = $string.join($delim);
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assert_eq!($expected, s);
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}};
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}
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#[test]
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fn test_join_for_different_types() {
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test_join!("a-b", ["a", "b"], "-");
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let hyphen = "-".to_string();
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test_join!("a-b", [s("a"), s("b")], &*hyphen);
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test_join!("a-b", vec!["a", "b"], &*hyphen);
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test_join!("a-b", &*vec!["a", "b"], "-");
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test_join!("a-b", vec![s("a"), s("b")], "-");
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}
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#[test]
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fn test_join_for_different_lengths() {
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let empty: &[&str] = &[];
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test_join!("", empty, "-");
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test_join!("a", ["a"], "-");
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test_join!("a-b", ["a", "b"], "-");
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test_join!("-a-bc", ["", "a", "bc"], "-");
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}
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// join has fast paths for small separators up to 4 bytes
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// this tests the slow paths.
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#[test]
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fn test_join_for_different_lengths_with_long_separator() {
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assert_eq!("～～～～～".len(), 15);
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let empty: &[&str] = &[];
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test_join!("", empty, "～～～～～");
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test_join!("a", ["a"], "～～～～～");
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test_join!("a～～～～～b", ["a", "b"], "～～～～～");
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test_join!("～～～～～a～～～～～bc", ["", "a", "bc"], "～～～～～");
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}
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#[test]
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fn test_join_issue_80335() {
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use core::{borrow::Borrow, cell::Cell};
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struct WeirdBorrow {
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state: Cell<bool>,
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}
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impl Default for WeirdBorrow {
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fn default() -> Self {
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WeirdBorrow { state: Cell::new(false) }
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}
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}
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impl Borrow<str> for WeirdBorrow {
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fn borrow(&self) -> &str {
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let state = self.state.get();
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if state {
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"0"
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} else {
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self.state.set(true);
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"123456"
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}
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}
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}
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let arr: [WeirdBorrow; 3] = Default::default();
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test_join!("0-0-0", arr, "-");
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}
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#[test]
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#[cfg_attr(miri, ignore)] // Miri is too slow
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fn test_unsafe_slice() {
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assert_eq!("ab", unsafe { "abc".get_unchecked(0..2) });
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assert_eq!("bc", unsafe { "abc".get_unchecked(1..3) });
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assert_eq!("", unsafe { "abc".get_unchecked(1..1) });
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fn a_million_letter_a() -> String {
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let mut i = 0;
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let mut rs = String::new();
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while i < 100000 {
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rs.push_str("aaaaaaaaaa");
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i += 1;
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}
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rs
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}
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fn half_a_million_letter_a() -> String {
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let mut i = 0;
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let mut rs = String::new();
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while i < 100000 {
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rs.push_str("aaaaa");
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i += 1;
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}
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rs
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}
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let letters = a_million_letter_a();
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assert_eq!(half_a_million_letter_a(), unsafe { letters.get_unchecked(0..500000) });
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}
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#[test]
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fn test_starts_with() {
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assert!("".starts_with(""));
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assert!("abc".starts_with(""));
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assert!("abc".starts_with("a"));
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assert!(!"a".starts_with("abc"));
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assert!(!"".starts_with("abc"));
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assert!(!"ödd".starts_with("-"));
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assert!("ödd".starts_with("öd"));
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}
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#[test]
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fn test_ends_with() {
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assert!("".ends_with(""));
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assert!("abc".ends_with(""));
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assert!("abc".ends_with("c"));
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assert!(!"a".ends_with("abc"));
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assert!(!"".ends_with("abc"));
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assert!(!"ddö".ends_with("-"));
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assert!("ddö".ends_with("dö"));
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}
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#[test]
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fn test_is_empty() {
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assert!("".is_empty());
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assert!(!"a".is_empty());
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}
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#[test]
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fn test_replacen() {
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assert_eq!("".replacen('a', "b", 5), "");
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assert_eq!("acaaa".replacen("a", "b", 3), "bcbba");
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assert_eq!("aaaa".replacen("a", "b", 0), "aaaa");
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let test = "test";
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assert_eq!(" test test ".replacen(test, "toast", 3), " toast toast ");
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assert_eq!(" test test ".replacen(test, "toast", 0), " test test ");
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assert_eq!(" test test ".replacen(test, "", 5), " ");
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assert_eq!("qwer123zxc789".replacen(char::is_numeric, "", 3), "qwerzxc789");
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}
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#[test]
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fn test_replace() {
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let a = "a";
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assert_eq!("".replace(a, "b"), "");
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assert_eq!("a".replace(a, "b"), "b");
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assert_eq!("ab".replace(a, "b"), "bb");
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let test = "test";
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assert_eq!(" test test ".replace(test, "toast"), " toast toast ");
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assert_eq!(" test test ".replace(test, ""), " ");
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}
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#[test]
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fn test_replace_2a() {
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let data = "ประเทศไทย中华";
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let repl = "دولة الكويت";
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let a = "ประเ";
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let a2 = "دولة الكويتทศไทย中华";
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assert_eq!(data.replace(a, repl), a2);
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}
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#[test]
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fn test_replace_2b() {
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let data = "ประเทศไทย中华";
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let repl = "دولة الكويت";
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let b = "ะเ";
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let b2 = "ปรدولة الكويتทศไทย中华";
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assert_eq!(data.replace(b, repl), b2);
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}
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#[test]
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fn test_replace_2c() {
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let data = "ประเทศไทย中华";
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let repl = "دولة الكويت";
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let c = "中华";
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let c2 = "ประเทศไทยدولة الكويت";
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assert_eq!(data.replace(c, repl), c2);
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}
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#[test]
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fn test_replace_2d() {
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let data = "ประเทศไทย中华";
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let repl = "دولة الكويت";
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let d = "ไท华";
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assert_eq!(data.replace(d, repl), data);
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}
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#[test]
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fn test_replace_pattern() {
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let data = "abcdαβγδabcdαβγδ";
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assert_eq!(data.replace("dαβ", "😺😺😺"), "abc😺😺😺γδabc😺😺😺γδ");
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assert_eq!(data.replace('γ', "😺😺😺"), "abcdαβ😺😺😺δabcdαβ😺😺😺δ");
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assert_eq!(data.replace(&['a', 'γ'] as &[_], "😺😺😺"), "😺😺😺bcdαβ😺😺😺δ😺😺😺bcdαβ😺😺😺δ");
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assert_eq!(data.replace(|c| c == 'γ', "😺😺😺"), "abcdαβ😺😺😺δabcdαβ😺😺😺δ");
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}
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// The current implementation of SliceIndex fails to handle methods
|
||
// orthogonally from range types; therefore, it is worth testing
|
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// all of the indexing operations on each input.
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mod slice_index {
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// Test a slicing operation **that should succeed,**
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// testing it on all of the indexing methods.
|
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//
|
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// This is not suitable for testing failure on invalid inputs.
|
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macro_rules! assert_range_eq {
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($s:expr, $range:expr, $expected:expr) => {
|
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let mut s: String = $s.to_owned();
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||
let mut expected: String = $expected.to_owned();
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{
|
||
let s: &str = &s;
|
||
let expected: &str = &expected;
|
||
|
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assert_eq!(&s[$range], expected, "(in assertion for: index)");
|
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assert_eq!(s.get($range), Some(expected), "(in assertion for: get)");
|
||
unsafe {
|
||
assert_eq!(
|
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s.get_unchecked($range),
|
||
expected,
|
||
"(in assertion for: get_unchecked)",
|
||
);
|
||
}
|
||
}
|
||
{
|
||
let s: &mut str = &mut s;
|
||
let expected: &mut str = &mut expected;
|
||
|
||
assert_eq!(&mut s[$range], expected, "(in assertion for: index_mut)",);
|
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assert_eq!(
|
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s.get_mut($range),
|
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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_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; 4];
|
||
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; 4];
|
||
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 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");
|
||
|
||
// 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<'a>(
|
||
rev: bool,
|
||
pat: impl Pattern<'a, Searcher: ReverseSearcher<'a>>,
|
||
haystack: &'a str,
|
||
right: Vec<SearchStep>,
|
||
) {
|
||
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<'a, P>(p: P)
|
||
where
|
||
for<'b> &'b P: Pattern<'a>,
|
||
{
|
||
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);
|
||
}
|
||
|
||
#[test]
|
||
#[should_panic]
|
||
fn ceil_char_boundary_above_len_panic() {
|
||
let _ = "x".ceil_char_boundary(2);
|
||
}
|