159 lines
3.9 KiB
Rust
159 lines
3.9 KiB
Rust
#![cfg(not(feature = "no_function"))]
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use rhai::{
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Dynamic, Engine, EvalAltResult, Func, ImmutableString, ParseError, ParseErrorType, Scope, INT,
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};
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#[test]
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fn test_fn() -> Result<(), Box<EvalAltResult>> {
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let engine = Engine::new();
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// Expect duplicated parameters error
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assert!(matches!(
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engine
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.compile("fn hello(x, x) { x }")
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.expect_err("should be error"),
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ParseError(x, _) if *x == ParseErrorType::FnDuplicatedParam("hello".to_string(), "x".to_string())
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));
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Ok(())
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}
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#[test]
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fn test_call_fn() -> 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("foo", 42 as INT);
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let ast = engine.compile(
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r"
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fn hello(x, y) {
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x + y
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}
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fn hello(x) {
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x = x * foo;
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foo = 1;
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x
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}
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fn hello() {
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41 + foo
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}
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",
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)?;
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let r: INT = engine.call_fn(&mut scope, &ast, "hello", (42 as INT, 123 as INT))?;
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assert_eq!(r, 165);
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let r: INT = engine.call_fn(&mut scope, &ast, "hello", (123 as INT,))?;
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assert_eq!(r, 5166);
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let r: INT = engine.call_fn(&mut scope, &ast, "hello", ())?;
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assert_eq!(r, 42);
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assert_eq!(
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scope
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.get_value::<INT>("foo")
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.expect("variable foo should exist"),
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1
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);
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Ok(())
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}
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#[test]
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fn test_call_fn_private() -> Result<(), Box<EvalAltResult>> {
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let engine = Engine::new();
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let mut scope = Scope::new();
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let ast = engine.compile("fn add(x, n) { x + n }")?;
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let r: INT = engine.call_fn(&mut scope, &ast, "add", (40 as INT, 2 as INT))?;
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assert_eq!(r, 42);
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let ast = engine.compile("private fn add(x, n, ) { x + n }")?;
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assert!(matches!(
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*engine.call_fn::<_, INT>(&mut scope, &ast, "add", (40 as INT, 2 as INT))
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.expect_err("should error"),
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EvalAltResult::ErrorFunctionNotFound(fn_name, _) if fn_name == "add"
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));
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Ok(())
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}
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#[test]
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fn test_anonymous_fn() -> Result<(), Box<EvalAltResult>> {
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let calc_func = Func::<(INT, INT, INT), INT>::create_from_script(
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Engine::new(),
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"fn calc(x, y, z,) { (x + y) * z }",
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"calc",
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)?;
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assert_eq!(calc_func(42, 123, 9)?, 1485);
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let calc_func = Func::<(INT, String, INT), INT>::create_from_script(
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Engine::new(),
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"fn calc(x, y, z) { (x + len(y)) * z }",
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"calc",
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)?;
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assert_eq!(calc_func(42, "hello".to_string(), 9)?, 423);
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let calc_func = Func::<(INT, INT, INT), INT>::create_from_script(
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Engine::new(),
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"private fn calc(x, y, z) { (x + y) * z }",
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"calc",
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)?;
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assert!(matches!(
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*calc_func(42, 123, 9).expect_err("should error"),
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EvalAltResult::ErrorFunctionNotFound(fn_name, _) if fn_name == "calc"
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));
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Ok(())
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}
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#[test]
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fn test_fn_ptr() -> Result<(), Box<EvalAltResult>> {
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let mut engine = Engine::new();
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let ast = engine.compile(
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r#"
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fn foo(x) { this += x; }
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let x = 41;
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x.bar("foo", 1);
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x
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"#,
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)?;
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let ast_clone = ast.clone();
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engine.register_raw_fn(
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"bar",
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&[
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std::any::TypeId::of::<INT>(),
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std::any::TypeId::of::<ImmutableString>(),
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std::any::TypeId::of::<INT>(),
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],
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move |engine: &Engine, args: &mut [&mut Dynamic]| {
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let callback = args[1].clone().cast::<ImmutableString>();
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let value = args[2].clone();
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let this_ptr = args.get_mut(0).unwrap();
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engine.call_fn_dynamic(
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&mut Scope::new(),
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&ast_clone,
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&callback,
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Some(this_ptr),
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[value],
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)?;
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Ok(().into())
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},
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);
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assert_eq!(engine.eval_ast::<INT>(&ast)?, 42);
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Ok(())
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}
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