rhai/tests/arrays.rs

use rhai::{Engine, EvalAltResult, RegisterFn};

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

    assert_eq!(engine.eval::<i64>("let x = [1, 2, 3]; x[1]")?, 2);
    assert_eq!(engine.eval::<i64>("let y = [1, 2, 3]; y[1] = 5; y[1]")?, 5);

    Ok(())
}

#[test]
fn test_array_with_structs() -> Result<(), EvalAltResult> {
    #[derive(Clone)]
    struct TestStruct {
        x: i64,
    }

    impl TestStruct {
        fn update(&mut self) {
            self.x += 1000;
        }

        fn get_x(&mut self) -> i64 {
            self.x
        }

        fn set_x(&mut self, new_x: i64) {
            self.x = new_x;
        }

        fn new() -> TestStruct {
            TestStruct { x: 1 }
        }
    }

    let mut engine = Engine::new();

    engine.register_type::<TestStruct>();

    engine.register_get_set("x", TestStruct::get_x, TestStruct::set_x);
    engine.register_fn("update", TestStruct::update);
    engine.register_fn("new_ts", TestStruct::new);

    assert_eq!(engine.eval::<i64>("let a = [new_ts()]; a[0].x")?, 1);

    assert_eq!(
        engine.eval::<i64>(
            "let a = [new_ts()];     \
             a[0].x = 100;           \
             a[0].update();          \
             a[0].x",
        )?,
        1100
    );

    Ok(())
}