rhai/tests/functions.rs
2020-08-03 12:10:20 +08:00

173 lines
3.7 KiB
Rust

#![cfg(not(feature = "no_function"))]
use rhai::{Engine, EvalAltResult, ParseError, ParseErrorType, INT};
#[test]
fn test_functions() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(engine.eval::<INT>("fn add(x, n) { x + n } add(40, 2)")?, 42);
assert_eq!(
engine.eval::<INT>("fn add(x, n,) { x + n } add(40, 2,)")?,
42
);
assert_eq!(
engine.eval::<INT>("fn add(x, n) { x + n } let a = 40; add(a, 2); a")?,
40
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>("fn add(n) { this + n } let x = 40; x.add(2)")?,
42
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>("fn add(n) { this += n; } let x = 40; x.add(2); x")?,
42
);
assert_eq!(engine.eval::<INT>("fn mul2(x) { x * 2 } mul2(21)")?, 42);
assert_eq!(
engine.eval::<INT>("fn mul2(x) { x *= 2 } let a = 21; mul2(a); a")?,
21
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>("fn mul2() { this * 2 } let x = 21; x.mul2()")?,
42
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>("fn mul2() { this *= 2; } let x = 21; x.mul2(); x")?,
42
);
Ok(())
}
#[test]
fn test_function_pointers() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(engine.eval::<String>(r#"type_of(Fn("abc"))"#)?, "Fn");
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { 40 + x }
let f = Fn("foo");
call(f, 2)
"#
)?,
42
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { 40 + x }
let fn_name = "f";
fn_name += "oo";
let f = Fn(fn_name);
f.call(2)
"#
)?,
42
);
#[cfg(not(feature = "no_object"))]
assert!(matches!(
*engine.eval::<INT>(r#"let f = Fn("abc"); f.call(0)"#).expect_err("should error"),
EvalAltResult::ErrorFunctionNotFound(f, _) if f.starts_with("abc (")
));
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { 40 + x }
let x = #{ action: Fn("foo") };
x.action.call(2)
"#
)?,
42
);
#[cfg(not(feature = "no_object"))]
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(x) { this.data += x; }
let x = #{ data: 40, action: Fn("foo") };
x.action(2);
x.data
"#
)?,
42
);
Ok(())
}
#[test]
#[cfg(not(feature = "no_closure"))]
fn test_function_captures() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
assert_eq!(
engine.eval::<INT>(
r#"
fn foo(y) { x += y; x }
let x = 41;
let y = 999;
foo!(1) + x
"#
)?,
83
);
assert!(engine
.eval::<INT>(
r#"
fn foo(y) { x += y; x }
let x = 41;
let y = 999;
foo(1) + x
"#
)
.is_err());
#[cfg(not(feature = "no_object"))]
assert!(matches!(
engine.compile(
r#"
fn foo() { this += x; }
let x = 41;
let y = 999;
y.foo!();
"#
).expect_err("should error"),
ParseError(err, _) if matches!(*err, ParseErrorType::MalformedCapture(_))
));
Ok(())
}