rhai/tests/get_set.rs
2022-01-22 17:27:18 +08:00

305 lines
7.6 KiB
Rust

#![cfg(not(feature = "no_object"))]
use rhai::{Engine, EvalAltResult, Scope, INT};
#[test]
fn test_get_set() -> Result<(), Box<EvalAltResult>> {
#[derive(Clone)]
struct TestStruct {
x: INT,
y: INT,
array: Vec<INT>,
}
impl TestStruct {
fn get_x(&mut self) -> INT {
self.x
}
fn set_x(&mut self, new_x: INT) {
self.x = new_x;
}
fn get_y(&mut self) -> INT {
self.y
}
fn new() -> Self {
Self {
x: 1,
y: 0,
array: vec![1, 2, 3, 4, 5],
}
}
}
let mut engine = Engine::new();
engine.register_type::<TestStruct>();
engine.register_get_set("x", TestStruct::get_x, TestStruct::set_x);
engine.register_get("y", TestStruct::get_y);
engine.register_fn("add", |value: &mut INT| *value += 41);
engine.register_fn("new_ts", TestStruct::new);
assert_eq!(engine.eval::<INT>("let a = new_ts(); a.x = 500; a.x")?, 500);
assert_eq!(engine.eval::<INT>("let a = new_ts(); a.x.add(); a.x")?, 42);
assert_eq!(engine.eval::<INT>("let a = new_ts(); a.y.add(); a.y")?, 0);
engine.register_indexer_get_set(
|value: &mut TestStruct, index: &str| value.array[index.len()],
|value: &mut TestStruct, index: &str, new_val: INT| value.array[index.len()] = new_val,
);
#[cfg(not(feature = "no_index"))]
assert_eq!(engine.eval::<INT>(r#"let a = new_ts(); a["abc"]"#)?, 4);
#[cfg(not(feature = "no_index"))]
assert_eq!(
engine.eval::<INT>(r#"let a = new_ts(); a["abc"] = 42; a["abc"]"#)?,
42
);
assert_eq!(engine.eval::<INT>(r"let a = new_ts(); a.abc")?, 4);
assert_eq!(
engine.eval::<INT>(r"let a = new_ts(); a.abc = 42; a.abc")?,
42
);
Ok(())
}
#[test]
fn test_get_set_chain_with_write_back() -> Result<(), Box<EvalAltResult>> {
#[derive(Clone)]
struct TestChild {
x: INT,
}
impl TestChild {
fn get_x(&mut self) -> INT {
self.x
}
fn set_x(&mut self, new_x: INT) {
self.x = new_x;
}
fn new() -> TestChild {
TestChild { x: 1 }
}
}
#[derive(Clone)]
struct TestParent {
child: TestChild,
}
impl TestParent {
fn get_child(&mut self) -> TestChild {
self.child.clone()
}
fn set_child(&mut self, new_child: TestChild) {
self.child = new_child;
}
fn new() -> TestParent {
TestParent {
child: TestChild::new(),
}
}
}
let mut engine = Engine::new();
engine.register_type::<TestChild>();
engine.register_type_with_name::<TestParent>("TestParent");
engine.register_get_set("x", TestChild::get_x, TestChild::set_x);
engine.register_get_set("child", TestParent::get_child, TestParent::set_child);
#[cfg(not(feature = "no_index"))]
engine.register_indexer_get_set(
|parent: &mut TestParent, _: INT| parent.child.clone(),
|parent: &mut TestParent, n: INT, mut new_child: TestChild| {
new_child.x *= n;
parent.child = new_child;
},
);
engine.register_fn("new_tp", TestParent::new);
engine.register_fn("new_tc", TestChild::new);
assert_eq!(engine.eval::<INT>("let a = new_tp(); a.child.x")?, 1);
assert_eq!(
engine.eval::<INT>("let a = new_tp(); a.child.x = 42; a.child.x")?,
42
);
assert_eq!(
engine.eval::<String>("let a = new_tp(); type_of(a)")?,
"TestParent"
);
#[cfg(not(feature = "no_index"))]
assert_eq!(
engine.eval::<INT>("let a = new_tp(); let c = new_tc(); c.x = 123; a[2] = c; a.child.x")?,
246
);
#[cfg(not(feature = "no_index"))]
assert_eq!(
engine.eval::<INT>("let a = new_tp(); a[2].x = 42; a.child.x")?,
84
);
Ok(())
}
#[test]
fn test_get_set_op_assignment() -> Result<(), Box<EvalAltResult>> {
#[derive(Clone, Debug, Eq, PartialEq)]
struct Num(INT);
impl Num {
fn get(&mut self) -> INT {
self.0
}
fn set(&mut self, x: INT) {
self.0 = x;
}
}
let mut engine = Engine::new();
engine
.register_type::<Num>()
.register_fn("new_ts", || Num(40))
.register_get_set("v", Num::get, Num::set);
assert_eq!(
engine.eval::<Num>("let a = new_ts(); a.v = a.v + 2; a")?,
Num(42)
);
assert_eq!(
engine.eval::<Num>("let a = new_ts(); a.v += 2; a")?,
Num(42)
);
Ok(())
}
#[test]
fn test_get_set_chain_without_write_back() -> Result<(), Box<EvalAltResult>> {
#[derive(Debug, Clone)]
struct Outer {
pub inner: Inner,
}
#[derive(Debug, Clone)]
struct Inner {
pub value: INT,
}
let mut engine = Engine::new();
let mut scope = Scope::new();
scope.push(
"outer",
Outer {
inner: Inner { value: 42 },
},
);
engine
.register_type::<Inner>()
.register_get_set(
"value",
|t: &mut Inner| t.value,
|_: &mut Inner, new: INT| panic!("Inner::value setter called with {}", new),
)
.register_type::<Outer>()
.register_get_set(
"inner",
|t: &mut Outer| t.inner.clone(),
|_: &mut Outer, new: Inner| panic!("Outer::inner setter called with {:?}", new),
);
#[cfg(not(feature = "no_index"))]
engine.register_indexer_get_set(
|t: &mut Outer, n: INT| Inner {
value: t.inner.value * n,
},
|_: &mut Outer, n: INT, new: Inner| {
panic!("Outer::inner index setter called with {} and {:?}", n, new)
},
);
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, "outer.inner.value")?,
42
);
#[cfg(not(feature = "no_index"))]
assert_eq!(
engine.eval_with_scope::<INT>(&mut scope, "outer[2].value")?,
84
);
engine.run_with_scope(&mut scope, "print(outer.inner.value)")?;
#[cfg(not(feature = "no_index"))]
engine.run_with_scope(&mut scope, "print(outer[0].value)")?;
Ok(())
}
#[test]
fn test_get_set_collection() -> Result<(), Box<EvalAltResult>> {
type MyItem = INT;
type MyBag = std::collections::BTreeSet<MyItem>;
let mut engine = Engine::new();
engine
.register_type_with_name::<MyBag>("MyBag")
.register_iterator::<MyBag>()
.register_fn("new_bag", || MyBag::new())
.register_fn("len", |col: &mut MyBag| col.len() as INT)
.register_get("len", |col: &mut MyBag| col.len() as INT)
.register_fn("clear", |col: &mut MyBag| col.clear())
.register_fn("contains", |col: &mut MyBag, item: INT| col.contains(&item))
.register_fn("add", |col: &mut MyBag, item: MyItem| col.insert(item))
.register_fn("+=", |col: &mut MyBag, item: MyItem| col.insert(item))
.register_fn("remove", |col: &mut MyBag, item: MyItem| col.remove(&item))
.register_fn("-=", |col: &mut MyBag, item: MyItem| col.remove(&item))
.register_fn("+", |mut col1: MyBag, col2: MyBag| {
col1.extend(col2.into_iter());
col1
});
let result = engine.eval::<INT>(
"
let bag = new_bag();
bag += 1;
bag += 2;
bag += 39;
bag -= 2;
if !bag.contains(2) {
let sum = 0;
for n in bag { sum += n; }
sum + bag.len
} else {
-1
}
",
)?;
assert_eq!(result, 42);
Ok(())
}