52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
use rhai::{Engine, EvalAltResult, Scope};
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#[test]
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fn test_var_scope() -> Result<(), EvalAltResult> {
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let mut engine = Engine::new();
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let mut scope = Scope::new();
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engine.eval_with_scope::<()>(&mut scope, "let x = 4 + 5")?;
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assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 9);
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engine.eval_with_scope::<()>(&mut scope, "x = x + 1; x = x + 2;")?;
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assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 12);
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assert_eq!(engine.eval_with_scope::<()>(&mut scope, "{let x = 3}")?, ());
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assert_eq!(engine.eval_with_scope::<i64>(&mut scope, "x")?, 12);
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Ok(())
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}
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#[test]
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fn test_scope_eval() -> Result<(), EvalAltResult> {
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let mut engine = Engine::new();
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// First create the state
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let mut scope = Scope::new();
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// Then push some initialized variables into the state
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// NOTE: Remember the default numbers used by Rhai are i64 and f64.
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// Better stick to them or it gets hard to work with other variables in the script.
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scope.push("y", 42_i64);
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scope.push("z", 999_i64);
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// First invocation
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engine
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.eval_with_scope::<()>(
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&mut scope,
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r"
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let x = 4 + 5 - y + z;
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y = 1;
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",
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)
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.expect("y and z not found?");
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// Second invocation using the same state
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if let Ok(result) = engine.eval_with_scope::<i64>(&mut scope, "x") {
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println!("result: {}", result); // should print 966
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}
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// Variable y is changed in the script
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assert_eq!(scope.get_value::<i64>("y").unwrap(), 1);
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Ok(())
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}
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