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extern crate rlua;
use std::cell::Cell;
use std::rc::Rc;
use rlua::{Error, Function, Lua, MetaMethod, String, UserData, UserDataMethods};
#[test]
fn scope_func() {
let lua = Lua::new();
let rc = Rc::new(Cell::new(0));
lua.scope(|scope| {
let r = rc.clone();
let f = scope
.create_function(move |_, ()| {
r.set(42);
Ok(())
})
.unwrap();
lua.globals().set("bad", f.clone()).unwrap();
f.call::<_, ()>(()).unwrap();
assert_eq!(Rc::strong_count(&rc), 2);
});
assert_eq!(rc.get(), 42);
assert_eq!(Rc::strong_count(&rc), 1);
match lua
.globals()
.get::<_, Function>("bad")
.unwrap()
.call::<_, ()>(())
{
Err(Error::CallbackError { .. }) => {}
r => panic!("improper return for destructed function: {:?}", r),
};
}
#[test]
fn scope_drop() {
let lua = Lua::new();
struct MyUserdata(Rc<()>);
impl UserData for MyUserdata {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method("method", |_, _, ()| Ok(()));
}
}
let rc = Rc::new(());
lua.scope(|scope| {
lua.globals()
.set(
"test",
scope
.create_static_userdata(MyUserdata(rc.clone()))
.unwrap(),
)
.unwrap();
assert_eq!(Rc::strong_count(&rc), 2);
});
assert_eq!(Rc::strong_count(&rc), 1);
match lua.exec::<()>("test:method()", None) {
Err(Error::CallbackError { .. }) => {}
r => panic!("improper return for destructed userdata: {:?}", r),
};
}
#[test]
fn scope_capture() {
let lua = Lua::new();
let mut i = 0;
lua.scope(|scope| {
scope
.create_function_mut(|_, ()| {
i = 42;
Ok(())
})
.unwrap()
.call::<_, ()>(())
.unwrap();
});
assert_eq!(i, 42);
}
#[test]
fn outer_lua_access() {
let lua = Lua::new();
let table = lua.create_table().unwrap();
lua.scope(|scope| {
scope
.create_function_mut(|_, ()| {
table.set("a", "b").unwrap();
Ok(())
})
.unwrap()
.call::<_, ()>(())
.unwrap();
});
assert_eq!(table.get::<_, String>("a").unwrap(), "b");
}
#[test]
fn scope_userdata_methods() {
struct MyUserData<'a>(&'a Cell<i64>);
impl<'a> UserData for MyUserData<'a> {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method("inc", |_, data, ()| {
data.0.set(data.0.get() + 1);
Ok(())
});
methods.add_method("dec", |_, data, ()| {
data.0.set(data.0.get() - 1);
Ok(())
});
}
}
let lua = Lua::new();
let i = Cell::new(42);
lua.scope(|scope| {
let f: Function =
lua.eval(
r#"
function(u)
u:inc()
u:inc()
u:inc()
u:dec()
end
"#,
None,
).unwrap();
f.call::<_, ()>(scope.create_nonstatic_userdata(MyUserData(&i)).unwrap())
.unwrap();
});
assert_eq!(i.get(), 44);
}
#[test]
fn scope_userdata_functions() {
struct MyUserData<'a>(&'a i64);
impl<'a> UserData for MyUserData<'a> {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_meta_function(MetaMethod::Add, |lua, ()| {
let globals = lua.globals();
globals.set("i", globals.get::<_, i64>("i")? + 1)?;
Ok(())
});
methods.add_meta_function(MetaMethod::Sub, |lua, ()| {
let globals = lua.globals();
globals.set("i", globals.get::<_, i64>("i")? + 1)?;
Ok(())
});
}
}
let lua = Lua::new();
let f =
lua.exec::<Function>(
r#"
i = 0
return function(u)
_ = u + u
_ = u - 1
_ = 1 + u
end
"#,
None,
).unwrap();
let dummy = 0;
lua.scope(|scope| {
f.call::<_, ()>(scope.create_nonstatic_userdata(MyUserData(&dummy)).unwrap())
.unwrap();
});
assert_eq!(lua.globals().get::<_, i64>("i").unwrap(), 3);
}
#[test]
fn scope_userdata_mismatch() {
struct MyUserData<'a>(&'a Cell<i64>);
impl<'a> UserData for MyUserData<'a> {
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method("inc", |_, data, ()| {
data.0.set(data.0.get() + 1);
Ok(())
});
}
}
let lua = Lua::new();
lua.exec::<()>(
r#"
function okay(a, b)
a.inc(a)
b.inc(b)
end
function bad(a, b)
a.inc(b)
end
"#,
None,
).unwrap();
let a = Cell::new(1);
let b = Cell::new(1);
let okay: Function = lua.globals().get("okay").unwrap();
let bad: Function = lua.globals().get("bad").unwrap();
lua.scope(|scope| {
let au = scope.create_nonstatic_userdata(MyUserData(&a)).unwrap();
let bu = scope.create_nonstatic_userdata(MyUserData(&b)).unwrap();
assert!(okay.call::<_, ()>((au.clone(), bu.clone())).is_ok());
match bad.call::<_, ()>((au, bu)) {
Err(Error::CallbackError { ref cause, .. }) => match *cause.as_ref() {
Error::UserDataTypeMismatch => {}
ref other => panic!("wrong error type {:?}", other),
},
Err(other) => panic!("wrong error type {:?}", other),
Ok(_) => panic!("incorrectly returned Ok"),
}
});
}
|
