tests/ser.rs

use serde_derive::Serialize;

use std::collections::HashMap;

macro_rules! serializes_to {
    ($value:expr, $actual:expr) => {{
        let actual = serde_json5::to_string(&$value).unwrap();
        assert_eq!(actual, $actual);
    }};
    ($value:expr, $actual:expr,) => {
        serializes_to!($value, $actual)
    };
}

#[test]
fn serializes_bool() {
    serializes_to!(true, "true");
    serializes_to!(false, "false");
}

#[test]
fn serializes_i8() {
    let x: i8 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_u8() {
    let x: u8 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_i16() {
    let x: i16 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_u16() {
    let x: u16 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_i32() {
    let x: i32 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_u32() {
    let x: u32 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_i64() {
    let x: i64 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_u64() {
    let x: u64 = 42;
    serializes_to!(x, "42");
}

#[test]
fn serializes_f32() {
    let x: f32 = 42.42;
    serializes_to!(x, "42.42");

    serializes_to!(f32::INFINITY, "Infinity");
    serializes_to!(f32::NEG_INFINITY, "-Infinity");
    serializes_to!(f32::NAN, "NaN");
}

#[test]
fn serializes_f64() {
    let x: f64 = 42.42;
    serializes_to!(x, "42.42");

    serializes_to!(f64::INFINITY, "Infinity");
    serializes_to!(f64::NEG_INFINITY, "-Infinity");
    serializes_to!(f64::NAN, "NaN");
}

#[test]
fn serializes_char() {
    serializes_to!('x', "\"x\"");
    serializes_to!('자', "\"자\"");
    serializes_to!('"', r#""\"""#);
    serializes_to!('\r', r#""\r""#);
    serializes_to!('\n', r#""\n""#);
    serializes_to!('\t', r#""\t""#);
    serializes_to!('\\', r#""\\""#);
    serializes_to!('/', r#""/""#);
    serializes_to!('\u{0008}', r#""\b""#);
    serializes_to!('\u{000c}', r#""\f""#);
}

#[test]
fn serializes_str() {
    serializes_to!("Hello!", "\"Hello!\"");
    serializes_to!("안녕하세요", "\"안녕하세요\"");
    serializes_to!("\"quotes!\"", "\"\\\"quotes!\\\"\"");
    serializes_to!("new\nlines", "\"new\\nlines\"");
    serializes_to!("\\", "\"\\\\\"");
}

#[test]
fn serializes_string() {
    serializes_to!("Hello!".to_owned(), "\"Hello!\"");
    serializes_to!("안녕하세요".to_owned(), "\"안녕하세요\"");
    serializes_to!("\"quotes!\"".to_owned(), "\"\\\"quotes!\\\"\"");
    serializes_to!("new\nlines".to_owned(), "\"new\\nlines\"");
    serializes_to!("\\".to_owned(), "\"\\\\\"");
}

#[test]
#[ignore] // TODO currently unsupported
fn serializes_bytes() {}

#[test]
#[ignore] // TODO currently unsupported
fn serializes_byte_buf() {}

#[test]
fn serializes_option() {
    serializes_to!(None::<i32>, "null");
    serializes_to!(Some(42), "42");
    serializes_to!(Some(Some(42)), "42");
}

#[test]
fn serializes_unit() {
    serializes_to!((), "null");
}

#[test]
fn serializes_unit_struct() {
    #[derive(Serialize, PartialEq, Debug)]
    struct A;
    serializes_to!(A, "null");
}

#[test]
fn serializes_newtype_struct() {
    #[derive(Serialize, PartialEq, Debug)]
    struct A(i32);

    #[derive(Serialize, PartialEq, Debug)]
    struct B(f64);

    serializes_to!(A(42), "42");
    serializes_to!(B(42.), "42");
}

#[test]
fn serializes_seq() {
    #[derive(Serialize, PartialEq, Debug)]
    #[serde(untagged)]
    enum Val {
        Number(f64),
        Bool(bool),
        String(String),
    }

    serializes_to!(vec![1, 2, 3], "[1,2,3]");
    serializes_to!(
        vec![
            Val::Number(42.),
            Val::Bool(true),
            Val::String("hello".to_owned())
        ],
        "[42,true,\"hello\"]",
    )
}

#[test]
fn serializes_tuple() {
    serializes_to!((1, 2, 3), "[1,2,3]");
}

#[test]
fn serializes_tuple_struct() {
    #[derive(Serialize, PartialEq, Debug)]
    struct A(i32, f64);

    #[derive(Serialize, PartialEq, Debug)]
    struct B(f64, i32);

    serializes_to!(A(1, 2.), "[1,2]");
    serializes_to!(B(1., 2), "[1,2]");
}

#[test]
fn serializes_map() {
    let mut inner = HashMap::new();
    inner.insert("b".to_owned(), true);

    let mut outer = HashMap::new();
    outer.insert("a".to_owned(), inner);

    serializes_to!(outer, "{\"a\":{\"b\":true}}");
}

#[test]
fn serializes_struct() {
    #[derive(Serialize, PartialEq, Debug)]
    struct S {
        a: i32,
        b: i32,
        c: i32,
    }

    serializes_to!(S { a: 1, b: 2, c: 3 }, "{\"a\":1,\"b\":2,\"c\":3}");
}

#[test]
fn serializes_enum() {
    #[derive(Serialize, PartialEq, Debug)]
    enum E {
        A,
        B(i32),
        C(i32, i32),
        D { a: i32, b: i32 },
    }

    serializes_to!(E::A, "\"A\"");
    serializes_to!(E::B(2), "{\"B\":2}");
    serializes_to!(E::C(3, 5), "{\"C\":[3,5]}");
    serializes_to!(E::D { a: 7, b: 11 }, "{\"D\":{\"a\":7,\"b\":11}}");
}

#[test]
fn test_to_writer() {
    #[derive(Serialize)]
    struct S {
        a: i32,
        b: i32,
        c: i32,
    }

    let value = S { a: 5, b: 4, c: 3 };
    let mut writer = Vec::<u8>::new();
    serde_json5::to_writer(&mut writer, &value).expect("to_writer succeeds");
    let data = std::str::from_utf8(&writer).expect("valid utf8");
    assert_eq!(data, r#"{"a":5,"b":4,"c":3}"#);
}