rhai/tests/eval.rs
2020-03-21 00:23:13 +08:00

80 lines
1.5 KiB
Rust

use rhai::{Engine, EvalAltResult, Scope, INT};
#[test]
fn test_eval() -> Result<(), EvalAltResult> {
let mut engine = Engine::new();
assert_eq!(
engine.eval::<INT>(
r#"
eval("40 + 2")
"#
)?,
42
);
Ok(())
}
#[test]
#[cfg(not(feature = "no_function"))]
fn test_eval_function() -> Result<(), EvalAltResult> {
let mut engine = Engine::new();
let mut scope = Scope::new();
assert_eq!(
engine.eval_with_scope::<INT>(
&mut scope,
r#"
let x = 10;
fn foo(x) { x += 12; x }
let script = "let y = x;"; // build a script
script += "y += foo(y);";
script += "x + y";
eval(script)
"#
)?,
42
);
assert_eq!(
scope
.get_value::<INT>("x")
.expect("variable x should exist"),
10
);
assert_eq!(
scope
.get_value::<INT>("y")
.expect("variable y should exist"),
32
);
assert!(!scope.contains("z"));
Ok(())
}
#[test]
#[cfg(not(feature = "no_function"))]
fn test_eval_override() -> Result<(), EvalAltResult> {
let mut engine = Engine::new();
assert_eq!(
engine.eval::<String>(
r#"
fn eval(x) { x } // reflect the script back
eval("40 + 2")
"#
)?,
"40 + 2"
);
Ok(())
}