rhai/tests/constants.rs
2020-05-07 12:25:09 +08:00

22 lines
748 B
Rust

use rhai::{Engine, EvalAltResult, ParseErrorType, INT};
#[test]
fn test_constant() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(engine.eval::<INT>("const x = 123; x")?, 123);
assert!(matches!(
*engine.eval::<INT>("const x = 123; x = 42;").expect_err("expects error"),
EvalAltResult::ErrorParsing(err) if err.error_type() == &ParseErrorType::AssignmentToConstant("x".to_string())
));
#[cfg(not(feature = "no_index"))]
assert!(matches!(
*engine.eval::<INT>("const x = [1, 2, 3, 4, 5]; x[2] = 42;").expect_err("expects error"),
EvalAltResult::ErrorParsing(err) if err.error_type() == &ParseErrorType::AssignmentToConstant("x".to_string())
));
Ok(())
}