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(ParseErrorType::AssignmentToConstant(x), _) if x == "x" )); #[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(ParseErrorType::AssignmentToConstant(x), _) if x == "x" )); Ok(()) }