128 lines
3.0 KiB
Rust
128 lines
3.0 KiB
Rust
use rhai::{Engine, EvalAltResult, ParseErrorType, Scope, INT};
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#[test]
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fn test_constant() -> Result<(), Box<EvalAltResult>> {
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let engine = Engine::new();
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assert_eq!(engine.eval::<INT>("const x = 123; x")?, 123);
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assert!(matches!(
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*engine
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.eval::<INT>("const x = 123; x = 42;")
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.expect_err("expects error"),
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EvalAltResult::ErrorParsing(ParseErrorType::AssignmentToConstant(x), ..) if x == "x"
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));
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#[cfg(not(feature = "no_index"))]
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assert!(matches!(
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*engine.run("const x = [1, 2, 3, 4, 5]; x[2] = 42;").expect_err("expects error"),
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EvalAltResult::ErrorAssignmentToConstant(x, ..) if x == "x"
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));
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Ok(())
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}
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#[test]
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fn test_constant_scope() -> Result<(), Box<EvalAltResult>> {
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let engine = Engine::new();
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let mut scope = Scope::new();
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scope.push_constant("x", 42 as INT);
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assert!(matches!(
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*engine.run_with_scope(&mut scope, "x = 1").expect_err("expects error"),
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EvalAltResult::ErrorAssignmentToConstant(x, ..) if x == "x"
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));
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Ok(())
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}
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#[cfg(not(feature = "no_object"))]
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#[test]
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fn test_constant_mut() -> Result<(), Box<EvalAltResult>> {
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#[derive(Debug, Clone)]
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struct TestStruct(INT); // custom type
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let mut engine = Engine::new();
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fn set_value(obj: &mut TestStruct, value: INT) {
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obj.0 = value;
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}
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engine
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.register_type_with_name::<TestStruct>("TestStruct")
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.register_fn("new_ts", || TestStruct(123))
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.register_get("value", |obj: &mut TestStruct| obj.0)
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.register_set("value", set_value)
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.register_fn("update_value", set_value);
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assert_eq!(
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engine.eval::<INT>(
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"
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const MY_NUMBER = new_ts();
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MY_NUMBER.update_value(42);
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MY_NUMBER.value
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",
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)?,
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42
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);
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assert_eq!(
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engine.eval::<INT>(
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"
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const MY_NUMBER = new_ts();
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update_value(MY_NUMBER, 42);
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MY_NUMBER.value
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",
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)?,
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123
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);
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assert!(matches!(
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*engine
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.run(
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"
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const MY_NUMBER = new_ts();
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MY_NUMBER.value = 42;
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"
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)
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.unwrap_err(),
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EvalAltResult::ErrorNonPureMethodCallOnConstant(..)
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));
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let mut scope = Scope::new();
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scope.push_constant("MY_NUMBER", TestStruct(123));
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assert_eq!(
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engine.eval_with_scope::<INT>(
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&mut scope,
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"
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update_value(MY_NUMBER, 42);
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MY_NUMBER.value
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",
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)?,
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123
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);
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assert_eq!(
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engine.eval_with_scope::<INT>(
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&mut scope,
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"
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MY_NUMBER.update_value(42);
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MY_NUMBER.value
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",
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)?,
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42
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);
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assert!(matches!(
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*engine
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.run_with_scope(&mut scope, "MY_NUMBER.value = 42;")
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.unwrap_err(),
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EvalAltResult::ErrorNonPureMethodCallOnConstant(..)
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));
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Ok(())
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}
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