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use std::panic::catch_unwind;
use mlua::{Error, Function, Lua, Result, Thread, ThreadStatus};
#[test]
fn test_thread() -> Result<()> {
let lua = Lua::new();
let thread = lua.create_thread(
lua.load(
r#"
function (s)
local sum = s
for i = 1,4 do
sum = sum + coroutine.yield(sum)
end
return sum
end
"#,
)
.eval()?,
)?;
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(0)?, 0);
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(1)?, 1);
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(2)?, 3);
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(3)?, 6);
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(4)?, 10);
assert_eq!(thread.status(), ThreadStatus::Unresumable);
let accumulate = lua.create_thread(
lua.load(
r#"
function (sum)
while true do
sum = sum + coroutine.yield(sum)
end
end
"#,
)
.eval::<Function>()?,
)?;
for i in 0..4 {
accumulate.resume::<_, ()>(i)?;
}
assert_eq!(accumulate.resume::<_, i64>(4)?, 10);
assert_eq!(accumulate.status(), ThreadStatus::Resumable);
assert!(accumulate.resume::<_, ()>("error").is_err());
assert_eq!(accumulate.status(), ThreadStatus::Error);
let thread = lua
.load(
r#"
coroutine.create(function ()
while true do
coroutine.yield(42)
end
end)
"#,
)
.eval::<Thread>()?;
assert_eq!(thread.status(), ThreadStatus::Resumable);
assert_eq!(thread.resume::<_, i64>(())?, 42);
let thread: Thread = lua
.load(
r#"
coroutine.create(function(arg)
assert(arg == 42)
local yieldarg = coroutine.yield(123)
assert(yieldarg == 43)
return 987
end)
"#,
)
.eval()?;
assert_eq!(thread.resume::<_, u32>(42)?, 123);
assert_eq!(thread.resume::<_, u32>(43)?, 987);
match thread.resume::<_, u32>(()) {
Err(Error::CoroutineInactive) => {}
Err(_) => panic!("resuming dead coroutine error is not CoroutineInactive kind"),
_ => panic!("resuming dead coroutine did not return error"),
}
Ok(())
}
#[test]
fn coroutine_from_closure() -> Result<()> {
let lua = Lua::new();
let thrd_main = lua.create_function(|_, ()| Ok(()))?;
lua.globals().set("main", thrd_main)?;
#[cfg(any(feature = "lua53", feature = "lua52", feature = "luajit"))]
let thrd: Thread = lua.load("coroutine.create(main)").eval()?;
#[cfg(feature = "lua51")]
let thrd: Thread = lua
.load("coroutine.create(function(...) return main(unpack(arg)) end)")
.eval()?;
thrd.resume::<_, ()>(())?;
Ok(())
}
#[test]
fn coroutine_panic() {
match catch_unwind(|| -> Result<()> {
// check that coroutines propagate panics correctly
let lua = Lua::new();
let thrd_main = lua.create_function(|_, ()| -> Result<()> {
panic!("test_panic");
})?;
lua.globals().set("main", thrd_main.clone())?;
let thrd: Thread = lua.create_thread(thrd_main)?;
thrd.resume(())
}) {
Ok(r) => panic!("coroutine panic not propagated, instead returned {:?}", r),
Err(p) => assert!(*p.downcast::<&str>().unwrap() == "test_panic"),
}
}
|
