nmea0183-parser 0.3.2

A zero-allocation NMEA 0183 parser that separates message framing from content parsing
Documentation 
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use nom::{Err, IResult, Parser, error::ErrorKind};

use crate::nmea0183::{ChecksumMode, LineEndingMode, checksum_crlf};

#[test]
fn test_checksum_crlf_ok() {
    let i = "*1F";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);

    assert!(res.is_ok());
    assert_eq!(res.unwrap().1, Some(0x1F));

    let i = "";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);

    assert!(res.is_ok());
    assert_eq!(res.unwrap().1, None);
}

#[test]
fn test_checksum_crlf_large_hex() {
    let i = "*1F43";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_err());

    let error = res.unwrap_err();
    if let Err::Error(error) = error {
        assert_eq!(error.code, ErrorKind::Count)
    } else {
        panic!("Unexpected error")
    }
}

#[test]
fn test_checksum_crlf_large_text() {
    let i = "*1Fzz";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_err());

    let error = res.unwrap_err();
    if let Err::Error(error) = error {
        assert_eq!(error.code, ErrorKind::Count)
    } else {
        panic!("Unexpected error")
    }
}

#[test]
fn test_checksum_crlf_small() {
    let i = "*1";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_err());

    let error = res.unwrap_err();
    if let Err::Error(error) = error {
        assert_eq!(error.code, ErrorKind::Eof)
    } else {
        panic!("Unexpected error")
    }
}

#[test]
fn test_checksum_crlf_non_hex() {
    let i = "*1z";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_err());

    let error = res.unwrap_err();
    if let Err::Error(error) = error {
        assert_eq!(error.code, ErrorKind::IsA)
    } else {
        panic!("Unexpected error")
    }
}

#[test]
fn test_checksum_crlf_with_crlf() {
    let i = "\r\n";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_err());

    let error = res.unwrap_err();
    if let Err::Error(error) = error {
        assert_eq!(error.code, ErrorKind::CrLf)
    } else {
        panic!("Unexpected error")
    }
}

#[test]
fn test_checksum_crlf_with_checksum() {
    let i = "*1F";
    let res: IResult<_, _> =
        checksum_crlf(ChecksumMode::Optional, LineEndingMode::Forbidden).parse(i);
    assert!(res.is_ok());
}