sub-strs 0.29.3

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Documentation 
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/*
==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--

sub-strs

Copyright (C) 2019-2024  Anonymous

There are several releases over multiple years,
they are listed as ranges, such as: "2019-2024".

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.

::--::--::--::--::--::--::--::--::--::--::--::--::--::--::--::--
*/

#[test]
#[cfg(feature="std")]
fn test_sub_strs() {
    for (inner, start, end) in &[("1.2.3+something", concat!('`'), concat!('`'))] {
        let src = format!("//! # {start}{inner}{end} _(July 3rd, 2022)_", start=start, inner=inner, end=end);

        let mut parts = sub_strs::sub_strs(&src, start, end);
        let sub = parts.next().unwrap();
        assert!(parts.next().is_none());

        {
            let range = sub.range();
            assert_eq!(range.start, sub.start());
            assert_eq!(range.end, sub.end());
        }
        {
            let range = sub.inner_range();
            assert_eq!(range.start, sub.inner_start());
            assert_eq!(range.end, sub.inner_end());
        }

        assert_eq!(inner, &sub.inner());

        let inner_start = src.find(inner).unwrap();
        assert_eq!(inner_start, sub.inner_start());
        assert_eq!(inner_start + inner.len(), sub.inner_end());
        assert_eq!(inner, &&src[sub.inner_start()..sub.inner_end()]);

        assert_eq!(inner_start - start.len(), sub.start());
        assert_eq!(inner_start + inner.len() + end.len(), sub.end());
    }
}