stanza 0.3.0

An abstract table model with customisable text formatting and renderers.
Documentation 
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use alloc::vec;
use alloc::vec::Vec;

#[test]
fn wrap() {
    #[derive(Debug)]
    struct Case {
        input: (&'static str, usize),
        expect: Vec<&'static str>,
    }

    for case in vec![
        Case {
            input: ("", 20),
            expect: vec![""],
        },
        Case {
            input: (" ", 20),
            expect: vec![" "],
        },
        Case {
            input: ("small", 20),
            expect: vec!["small"],
        },
        Case {
            input: ("small ", 20),
            expect: vec!["small "],
        },
        Case {
            input: ("large pair", 10),
            expect: vec!["large pair"],
        },
        Case {
            input: ("large pair", 20),
            expect: vec!["large pair"],
        },
        Case {
            input: ("the quick brown fox jumped over the lazy", 20),
            expect: vec!["the quick brown fox", "jumped over the lazy"],
        },
        Case {
            input: ("the quick brown fox jumped over the lazy dog", 20),
            expect: vec!["the quick brown fox", "jumped over the lazy", "dog"],
        },
        Case {
            input: ("Supercalifragilisticexpialidocious", 10),
            expect: vec!["Supercalif", "ragilistic", "expialidoc", "ious"],
        },
        Case {
            input: ("abcd Supercalifragilisticexpialidocious", 10),
            expect: vec!["abcd Super", "califragil", "isticexpia", "lidocious"],
        },
        Case {
            input: ("abcdefgh abcdefghijklmno", 10),
            expect: vec!["abcdefgh a", "bcdefghijk", "lmno"],
        },
        Case {
            input: ("abcdefghi abcdefghijklmno", 10),
            expect: vec!["abcdefghi", "abcdefghij", "klmno"],
        },
        Case {
            input: ("abcdefghij abcdefghijklmno", 10),
            expect: vec!["abcdefghij", "abcdefghij", "klmno"],
        },
        Case {
            input: ("abcde edcba abcde", 10),
            expect: vec!["abcde", "edcba", "abcde"],
        },
        Case {
            input: ("abcd edcba abcde", 10),
            expect: vec!["abcd edcba", "abcde"],
        },
        Case {
            input: ("abcde abcdefghij large pair", 10),
            expect: vec!["abcde", "abcdefghij", "large pair"],
        },
        Case {
            input: ("abc abcdefghijk tiny pair", 10),
            expect: vec!["abc abcdef", "ghijk tiny", "pair"],
        },
        Case {
            input: ("abc\ndef", 10),
            expect: vec!["abc", "def"],
        },
        Case {
            input: ("abc\n\ndef", 10),
            expect: vec!["abc", "", "def"],
        },
        Case {
            input: ("abc\n\ndef\n", 10), // single trailing newline is ignored
            expect: vec!["abc", "", "def"],
        },
        Case {
            input: ("abc\n\ndef\n\n", 10),
            expect: vec!["abc", "", "def", ""],
        },
        Case {
            input: ("abc\n\ndef ghi jkl", 10),
            expect: vec!["abc", "", "def ghi", "jkl"],
        },
    ] {
        let actual = super::wrap(case.input.0, case.input.1);
        assert_eq!(case.expect, actual, "for {:?}", &case);
    }
}

#[test]
fn split_preserving_whitespace() {
    #[derive(Debug)]
    struct Case {
        input: &'static str,
        expect: Vec<&'static str>,
    }

    for case in vec![
        Case {
            input: "",
            expect: vec![""],
        },
        Case {
            input: " ",
            expect: vec![" "],
        },
        Case {
            input: "  ",
            expect: vec!["  "],
        },
        Case {
            input: "  abc",
            expect: vec!["  abc"],
        },
        Case {
            input: "abc ",
            expect: vec!["abc", ""],
        },
        Case {
            input: "abc  ",
            expect: vec!["abc", " "],
        },
        Case {
            input: "abc def",
            expect: vec!["abc", "def"],
        },
        Case {
            input: "abc  def",
            expect: vec!["abc", " def"],
        },
        Case {
            input: "abc def ",
            expect: vec!["abc", "def", ""],
        },
        Case {
            input: "abc def  ",
            expect: vec!["abc", "def", " "],
        },
    ] {
        let actual = super::split_preserving_whitespace(case.input);
        assert_eq!(case.expect, actual, "for {:?}", case);

        let whitespace_in_input = count_whitespace(case.input);
        let whitespace_in_output = actual
            .iter()
            .map(|frag| count_whitespace(frag))
            .sum::<usize>();
        assert_eq!(
            whitespace_in_input,
            whitespace_in_output + actual.len() - 1,
            "for {:?}",
            case
        );
    }
}

fn count_whitespace(s: &str) -> usize {
    s.chars().filter(|ch| ch.is_whitespace()).count()
}