rhai/tests/looping.rs

use rhai::{Engine, EvalAltResult, ParseError, ParseErrorType, INT};

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

    assert_eq!(
        engine.eval::<INT>(
            r"
				let x = 0;
				let i = 0;

				loop {
					if i < 10 {
						i += 1;
						if x > 20 { continue; }
						x = x + i;
					} else {
						break;
					}
				}

				return x;
		"
        )?,
        21
    );

    assert!(matches!(
        engine.compile("let x = 0; break;").expect_err("should error"),
        ParseError(x, _) if *x == ParseErrorType::LoopBreak
    ));

    assert!(matches!(
        engine.compile("let x = 0; if x > 0 { continue; }").expect_err("should error"),
        ParseError(x, _) if *x == ParseErrorType::LoopBreak
    ));

    Ok(())
}