dasl 0.2.0

Data-Adressed Structures & Links
Documentation 
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use dasl::drisl::{from_slice, to_vec};
use serde::{Deserialize, Serialize};

fn to_binary(s: &'static str) -> Vec<u8> {
    assert!(s.len() % 2 == 0);
    let mut b = Vec::with_capacity(s.len() / 2);
    for i in 0..s.len() / 2 {
        b.push(u8::from_str_radix(&s[i * 2..(i + 1) * 2], 16).unwrap());
    }
    b
}

macro_rules! testcase {
    ($name:ident, f64, $expr:expr, $s:expr) => {
        #[test]
        fn $name() {
            let expr: f64 = $expr;
            let serialized = to_binary($s);
            assert_eq!(to_vec(&expr).unwrap(), serialized);
            let parsed: f64 = from_slice(&serialized[..]).unwrap();
            if !expr.is_nan() {
                assert_eq!(expr, parsed);
            } else {
                assert!(parsed.is_nan())
            }

            let parsed: f64 = dasl::drisl::from_reader(&mut &serialized[..]).unwrap();
            if !expr.is_nan() {
                assert_eq!(expr, parsed);
            } else {
                assert!(parsed.is_nan())
            }
        }
    };
    ($name:ident, $ty:ty, $expr:expr, $s:expr) => {
        #[test]
        fn $name() {
            let expr: $ty = $expr;
            let serialized = to_binary($s);
            assert_eq!(
                to_vec(&expr).expect("ser1 works"),
                serialized,
                "serialization differs"
            );
            let parsed: $ty = from_slice(&serialized[..]).expect("de1 works");
            assert_eq!(parsed, expr, "parsed result differs");
        }
    };
}

testcase!(test_bool_false, bool, false, "f4");
testcase!(test_bool_true, bool, true, "f5");
testcase!(test_isize_neg_256, isize, -256, "38ff");
testcase!(test_isize_neg_257, isize, -257, "390100");
testcase!(test_isize_255, isize, 255, "18ff");
testcase!(test_i8_5, i8, 5, "05");
testcase!(test_i8_23, i8, 23, "17");
testcase!(test_i8_24, i8, 24, "1818");
testcase!(test_i8_neg_128, i8, -128, "387f");
testcase!(test_u32_98745874, u32, 98745874, "1a05e2be12");
// In DAG-CBOR you cannot deserialize into f32, it's always f64.
//testcase!(test_f32_1234_point_5, f32, 1234.5, "fb40934a0000000000");
testcase!(test_f64_12345_point_6, f64, 12345.6, "fb40c81ccccccccccd");
testcase!(test_char_null, char, '\x00', "6100");
testcase!(test_char_broken_heart, char, '💔', "64f09f9294");
testcase!(
    test_str_pangram_de,
    String,
    "aâø↓é".to_owned(),
    "6a61c3a2c3b8e28693c3a9"
);

#[derive(Debug, PartialEq, Deserialize, Serialize)]
struct NewtypeStruct(bool);
testcase!(
    test_newtype_struct,
    NewtypeStruct,
    NewtypeStruct(true),
    "f5"
);

testcase!(test_option_none, Option<u8>, None, "f6");
testcase!(test_option_some, Option<u8>, Some(42), "182a");

#[derive(Debug, PartialEq, Deserialize, Serialize)]
struct Person {
    name: String,
    year_of_birth: u16,
    profession: Option<String>,
}

testcase!(
    test_person_struct,
    Person,
    Person {
        name: "Grace Hopper".to_string(),
        year_of_birth: 1906,
        profession: Some("computer scientist".to_string()),
    },
    "a3646e616d656c477261636520486f707065726a70726f66657373696f6e72636f6d707574657220736369656e746973746d796561725f6f665f6269727468190772"
);

#[derive(Debug, PartialEq, Deserialize, Serialize)]
struct OptionalPerson {
    name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    year_of_birth: Option<u16>,
    profession: Option<String>,
}

testcase!(
    test_optional_person_struct,
    OptionalPerson,
    OptionalPerson {
        name: "Grace Hopper".to_string(),
        year_of_birth: None,
        profession: Some("computer scientist".to_string()),
    },
    "a2646e616d656c477261636520486f707065726a70726f66657373696f6e72636f6d707574657220736369656e74697374"
);

#[derive(Debug, PartialEq, Deserialize, Serialize)]
enum Color {
    Red,
    Blue,
    Yellow,
    Other(u64),
    Alpha(u64, u8),
}

testcase!(test_color_enum, Color, Color::Blue, "64426c7565");
testcase!(
    test_color_enum_transparent,
    Color,
    Color::Other(42),
    "a1654f74686572182a"
);
testcase!(
    test_color_enum_with_alpha,
    Color,
    Color::Alpha(234567, 60),
    "a165416c706861821a00039447183c"
);
testcase!(test_i128_a, i128, -1i128, "20");
testcase!(test_u128, u128, 17, "11");