Grcov report - dasharray.rs

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//! Parser for the `stroke-dasharray` property.

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use cssparser::Parser;

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use crate::error::*;

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use crate::length::*;

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use crate::parsers::{optional_comma, Parse};

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#[derive(Debug, Default, PartialEq, Clone)]

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pub enum Dasharray {

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    #[default]

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    None,

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    Array(Box<[ULength<Both>]>),

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impl Parse for Dasharray {

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    fn parse<'i>(parser: &mut Parser<'i, '_>) -> Result<Dasharray, ParseError<'i>> {

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        if parser

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            .try_parse(|p| p.expect_ident_matching("none"))

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            .is_ok()

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            return Ok(Dasharray::None);

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        let mut dasharray = Vec::new();

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        loop {

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            let d = ULength::<Both>::parse(parser)?;

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            dasharray.push(d);

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            if parser.is_exhausted() {

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                break;

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            optional_comma(parser);

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        Ok(Dasharray::Array(dasharray.into_boxed_slice()))

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#[cfg(test)]

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mod tests {

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    use super::*;

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    fn dasharray(l: &[ULength<Both>]) -> Dasharray {

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        Dasharray::Array(l.to_vec().into_boxed_slice())

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    #[test]

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    fn parses_dash_array() {

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        // helper to cut down boilderplate

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        let length_parse = |s| ULength::<Both>::parse_str(s).unwrap();

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        let expected = dasharray(&[

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            length_parse("1"),

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            length_parse("2in"),

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            length_parse("3"),

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            length_parse("4%"),

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]);

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        let sample_1 = dasharray(&[length_parse("10"), length_parse("6")]);

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        let sample_2 = dasharray(&[length_parse("5"), length_parse("5"), length_parse("20")]);

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        let sample_3 = dasharray(&[

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            length_parse("10px"),

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            length_parse("20px"),

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            length_parse("20px"),

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]);

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        let sample_4 = dasharray(&[

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            length_parse("25"),

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            length_parse("5"),

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            length_parse("5"),

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            length_parse("5"),

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]);

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        let sample_5 = dasharray(&[length_parse("3.1415926"), length_parse("8")]);

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        let sample_6 = dasharray(&[length_parse("5"), length_parse("3.14")]);

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        let sample_7 = dasharray(&[length_parse("2")]);

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        assert_eq!(Dasharray::parse_str("none").unwrap(), Dasharray::None);

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        assert_eq!(Dasharray::parse_str("1 2in,3 4%").unwrap(), expected);

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        assert_eq!(Dasharray::parse_str("10,6").unwrap(), sample_1);

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        assert_eq!(Dasharray::parse_str("5,5,20").unwrap(), sample_2);

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        assert_eq!(Dasharray::parse_str("10px 20px 20px").unwrap(), sample_3);

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        assert_eq!(Dasharray::parse_str("25  5 , 5 5").unwrap(), sample_4);

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        assert_eq!(Dasharray::parse_str("3.1415926,8").unwrap(), sample_5);

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        assert_eq!(Dasharray::parse_str("5, 3.14").unwrap(), sample_6);

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        assert_eq!(Dasharray::parse_str("2").unwrap(), sample_7);

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        // Negative numbers

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        assert!(Dasharray::parse_str("20,40,-20").is_err());

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        // Empty dash_array

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        assert!(Dasharray::parse_str("").is_err());

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        assert!(Dasharray::parse_str("\t  \n     ").is_err());

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        assert!(Dasharray::parse_str(",,,").is_err());

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        assert!(Dasharray::parse_str("10,  \t, 20 \n").is_err());

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        // No trailing commas allowed, parse error

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        assert!(Dasharray::parse_str("10,").is_err());

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        // A comma should be followed by a number

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        assert!(Dasharray::parse_str("20,,10").is_err());

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