rhai/tests/maps.rs

#![cfg(not(feature = "no_object"))]

use rhai::{Engine, EvalAltResult, Map, Scope, INT};

#[test]
fn test_map_indexing() -> Result<(), Box<EvalAltResult>> {
    let engine = Engine::new();

    #[cfg(not(feature = "no_index"))]
    {
        assert_eq!(
            engine.eval::<INT>(r#"let x = #{a: 1, b: 2, c: 3}; x["b"]"#)?,
            2
        );
        assert_eq!(
            engine.eval::<char>(
                r#"
                    let y = #{d: 1, "e": #{a: 42, b: 88, "": "hello"}, " 123 xyz": 9};
                    y.e[""][4]
            "#
            )?,
            'o'
        );
    }

    assert_eq!(
        engine.eval::<INT>("let y = #{a: 1, b: 2, c: 3}; y.a = 5; y.a")?,
        5
    );
    engine.eval::<()>("let y = #{a: 1, b: 2, c: 3}; y.z")?;

    assert!(engine.eval::<bool>(r#"let y = #{a: 1, b: 2, c: 3}; "c" in y"#)?);
    assert!(engine.eval::<bool>("let y = #{a: 1, b: 2, c: 3}; 'b' in y")?);
    assert!(!engine.eval::<bool>(r#"let y = #{a: 1, b: 2, c: 3}; "z" in y"#)?);

    assert_eq!(
        engine.eval::<INT>(
            r#"
                let x = #{a: 1, b: 2, c: 3};
                let c = x.remove("c");
                x.len() + c
           "#
        )?,
        5
    );
    assert_eq!(
        engine.eval::<INT>(
            r"
                let x = #{a: 1, b: 2, c: 3};
                let y = #{b: 42, d: 9};
                x.mixin(y);
                x.len() + x.b
           "
        )?,
        46
    );
    assert_eq!(
        engine.eval::<INT>(
            r"
                let x = #{a: 1, b: 2, c: 3};
                x += #{b: 42, d: 9};
                x.len() + x.b
           "
        )?,
        46
    );
    assert_eq!(
        engine
            .eval::<Map>(
                r"
                    let x = #{a: 1, b: 2, c: 3};
                    let y = #{b: 42, d: 9};
                    x + y
           "
            )?
            .len(),
        4
    );

    Ok(())
}

#[test]
fn test_map_assign() -> Result<(), Box<EvalAltResult>> {
    let engine = Engine::new();

    let x = engine.eval::<Map>(r#"let x = #{a: 1, b: true, "c$": "hello"}; x"#)?;

    assert_eq!(
        x.get("a")
            .cloned()
            .expect("should have property a")
            .cast::<INT>(),
        1
    );
    assert_eq!(
        x.get("b")
            .cloned()
            .expect("should have property b")
            .cast::<bool>(),
        true
    );
    assert_eq!(
        x.get("c$")
            .cloned()
            .expect("should have property c$")
            .cast::<String>(),
        "hello"
    );

    Ok(())
}

#[test]
fn test_map_return() -> Result<(), Box<EvalAltResult>> {
    let engine = Engine::new();

    let x = engine.eval::<Map>(r#"#{a: 1, b: true, "c$": "hello"}"#)?;

    assert_eq!(
        x.get("a")
            .cloned()
            .expect("should have property a")
            .cast::<INT>(),
        1
    );
    assert_eq!(
        x.get("b")
            .cloned()
            .expect("should have property b")
            .cast::<bool>(),
        true
    );
    assert_eq!(
        x.get("c$")
            .cloned()
            .expect("should have property c$")
            .cast::<String>(),
        "hello"
    );

    Ok(())
}

#[test]
fn test_map_for() -> Result<(), Box<EvalAltResult>> {
    let engine = Engine::new();

    assert_eq!(
        engine
            .eval::<String>(
                r#"
                    let map = #{a: 1, b_x: true, "$c d e!": "hello"};
                    let s = "";

                    for key in keys(map) {
                        s += key;
                    }

                    s
        "#
            )?
            .len(),
        11
    );

    Ok(())
}

#[test]
/// Because a Rhai object map literal is almost the same as JSON,
/// it is possible to convert from JSON into a Rhai object map.
fn test_map_json() -> Result<(), Box<EvalAltResult>> {
    let engine = Engine::new();

    let json = r#"{"a":1, "b":true, "c":42, "$d e f!":"hello", "z":null}"#;

    let map = engine.parse_json(json, true)?;

    assert!(!map.contains_key("x"));

    assert_eq!(
        map.get("a")
            .cloned()
            .expect("should have property a")
            .cast::<INT>(),
        1
    );
    assert_eq!(
        map.get("b")
            .cloned()
            .expect("should have property b")
            .cast::<bool>(),
        true
    );
    assert_eq!(
        map.get("c")
            .cloned()
            .expect("should have property a")
            .cast::<INT>(),
        42
    );
    assert_eq!(
        map.get("$d e f!")
            .cloned()
            .expect("should have property $d e f!")
            .cast::<String>(),
        "hello"
    );
    assert_eq!(
        map.get("z")
            .cloned()
            .expect("should have property z")
            .cast::<()>(),
        ()
    );

    #[cfg(not(feature = "no_index"))]
    {
        let mut scope = Scope::new();
        scope.push_constant("map", map);

        assert_eq!(
            engine
                .eval_with_scope::<String>(
                    &mut scope,
                    r#"
                        let s = "";

                        for key in keys(map) {
                            s += key;
                        }

                        s
        "#
                )?
                .len(),
            11
        );
    }

    Ok(())
}