rhai/tests/float.rs
2020-03-24 16:57:35 +08:00

66 lines
1.5 KiB
Rust

#![cfg(not(feature = "no_float"))]
use rhai::{Engine, EvalAltResult, RegisterFn, FLOAT};
const EPSILON: FLOAT = 0.000_000_000_1;
#[test]
fn test_float() -> Result<(), EvalAltResult> {
let mut engine = Engine::new();
assert_eq!(
engine.eval::<bool>("let x = 0.0; let y = 1.0; x < y")?,
true
);
assert_eq!(
engine.eval::<bool>("let x = 0.0; let y = 1.0; x > y")?,
false
);
assert!((engine.eval::<FLOAT>("let x = 9.9999; x")? - 9.9999 as FLOAT).abs() < EPSILON);
Ok(())
}
#[test]
fn struct_with_float() -> Result<(), EvalAltResult> {
#[derive(Clone)]
struct TestStruct {
x: f64,
}
impl TestStruct {
fn update(&mut self) {
self.x += 5.789_f64;
}
fn get_x(&mut self) -> f64 {
self.x
}
fn set_x(&mut self, new_x: f64) {
self.x = new_x;
}
fn new() -> Self {
TestStruct { x: 1.0 }
}
}
let mut engine = Engine::new();
engine.register_type::<TestStruct>();
engine.register_get_set("x", TestStruct::get_x, TestStruct::set_x);
engine.register_fn("update", TestStruct::update);
engine.register_fn("new_ts", TestStruct::new);
assert!(
(engine.eval::<FLOAT>("let ts = new_ts(); ts.update(); ts.x")? - 6.789).abs() < EPSILON
);
assert!(
(engine.eval::<FLOAT>("let ts = new_ts(); ts.x = 10.1001; ts.x")? - 10.1001).abs()
< EPSILON
);
Ok(())
}