use ulua::{Error, Function, Lua, Result, String, Table, Variadic};
#[test]
fn test_function_call() -> Result<()> {
let lua = Lua::new();
let concat = lua
.load(r#"function(arg1, arg2) return arg1 .. arg2 end"#)
.eval::<Function>()?;
assert_eq!(concat.call::<String>(("foo", "bar"))?, "foobar");
Ok(())
}
#[test]
fn test_function_call_error() -> Result<()> {
let lua = Lua::new();
let concat_err = lua
.load(r#"function(arg1, arg2) error("concat error") end"#)
.eval::<Function>()?;
match concat_err.call::<String>(("foo", "bar")) {
Err(Error::RuntimeError(msg)) if msg.contains("concat error") => {}
other => panic!("unexpected result: {other:?}"),
}
Ok(())
}
#[test]
fn test_function_bind() -> Result<()> {
let lua = Lua::new();
let globals = lua.globals();
lua.load(
r#"
function concat(...)
local res = ""
for _, s in pairs({...}) do
res = res..s
end
return res
end
"#,
)
.exec()?;
let mut concat = globals.get::<Function>("concat")?;
concat = concat.bind("foo")?;
concat = concat.bind("bar")?;
concat = concat.bind(("baz", "baf"))?;
assert_eq!(concat.call::<String>(())?, "foobarbazbaf");
assert_eq!(concat.call::<String>(("hi", "wut"))?, "foobarbazbafhiwut");
let mut concat2 = globals.get::<Function>("concat")?;
concat2 = concat2.bind(())?;
assert_eq!(concat2.call::<String>(())?, "");
assert_eq!(concat2.call::<String>(("ab", "cd"))?, "abcd");
Ok(())
}
#[test]
#[cfg(not(target_arch = "wasm32"))]
fn test_function_bind_error() -> Result<()> {
let lua = Lua::new();
let func = lua.load(r#"function(...) end"#).eval::<Function>()?;
assert!(func.bind(Variadic::from_iter(1..1000000)).is_err());
assert!(func.call::<()>(Variadic::from_iter(1..1000000)).is_err());
Ok(())
}
#[test]
fn test_function_environment() -> Result<()> {
let lua = Lua::new();
let globals = lua.globals();
let rust_func = lua.create_function(|_, ()| Ok("hello"))?;
assert_eq!(rust_func.environment(), None);
assert_eq!(rust_func.set_environment(globals.clone()).ok(), Some(false));
globals.set("hello", "global")?;
let lua_func = lua
.load(
r#"
local t = ""
return function()
-- two upvalues
return t .. hello
end
"#,
)
.eval::<Function>()?;
let lua_func2 = lua.load("return hello").into_function()?;
assert_eq!(lua_func.call::<String>(())?, "global");
assert_eq!(lua_func.environment().as_ref(), Some(&globals));
let env = lua.create_table_from([("hello", "local")])?;
assert!(lua_func.set_environment(env.clone())?);
assert_eq!(lua_func.call::<String>(())?, "local");
assert_eq!(lua_func2.call::<String>(())?, "global");
lua.load(
r#"
local number = 15
function lucky() return tostring("number is "..number) end
new_env = {
tostring = function() return tostring(number) end,
}
"#,
)
.exec()?;
let lucky = globals.get::<Function>("lucky")?;
assert_eq!(lucky.call::<String>(())?, "number is 15");
let new_env = globals.get::<Table>("new_env")?;
lucky.set_environment(new_env)?;
assert_eq!(lucky.call::<String>(())?, "15");
let lua_func2 = lua
.load(r#"return function() return (function() return hello end)() end"#)
.eval::<Function>()?;
assert!(lua_func2.set_environment(env.clone())?);
lua.gc_collect()?;
assert_eq!(lua_func2.call::<String>(())?, "local");
let chunk = lua
.load("return hello")
.set_environment(lua.create_table_from([("hello", "chunk")])?)
.into_function()?;
assert_eq!(chunk.environment().unwrap().get::<String>("hello")?, "chunk");
Ok(())
}
#[test]
fn test_function_info() -> Result<()> {
let lua = Lua::new();
let globals = lua.globals();
lua.load(
r#"
function function1()
return function() end
end
"#,
)
.set_name("source1")
.exec()?;
let function1 = globals.get::<Function>("function1")?;
let function2 = function1.call::<Function>(())?;
let function3 = lua.create_function(|_, ()| Ok(()))?;
let function1_info = function1.info();
assert_eq!(function1_info.name.as_deref(), Some("function1"));
assert_eq!(function1_info.source.as_deref(), Some("source1"));
assert_eq!(function1_info.line_defined, Some(2));
assert_eq!(function1_info.last_line_defined, None);
assert_eq!(function1_info.what, "Lua");
let function2_info = function2.info();
assert_eq!(function2_info.name, None);
assert_eq!(function2_info.source.as_deref(), Some("source1"));
assert_eq!(function2_info.line_defined, Some(3));
assert_eq!(function2_info.last_line_defined, None);
assert_eq!(function2_info.what, "Lua");
let function3_info = function3.info();
assert_eq!(function3_info.name, None);
assert_eq!(function3_info.source.as_deref(), Some("=[C]"));
assert_eq!(function3_info.line_defined, None);
assert_eq!(function3_info.last_line_defined, None);
assert_eq!(function3_info.what, "C");
let print_info = globals.get::<Function>("print")?.info();
assert_eq!(print_info.name.as_deref(), Some("print"));
assert_eq!(print_info.source.as_deref(), Some("=[C]"));
assert_eq!(print_info.what, "C");
assert_eq!(print_info.line_defined, None);
Ok(())
}
#[test]
fn test_function_coverage() -> Result<()> {
let lua = Lua::new();
lua.set_compiler(ulua::Compiler::default().set_coverage_level(1));
let f = lua
.load(
r#"local s = "abc"
assert(#s == 3)
function abc(i)
if i < 5 then
return 0
else
return 1
end
end
(function()
(function() abc(10) end)()
end)()
"#,
)
.into_function()?;
f.call::<()>(())?;
let mut report = Vec::new();
f.coverage(|cov| {
report.push(cov);
});
assert_eq!(
report[0],
ulua::CoverageInfo {
function: None,
line_defined: 1,
depth: 0,
hits: vec![-1, 1, 1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1],
}
);
assert_eq!(
report[1],
ulua::CoverageInfo {
function: Some("abc".into()),
line_defined: 4,
depth: 1,
hits: vec![-1, -1, -1, -1, -1, 1, 0, -1, 1, -1, -1, -1, -1, -1, -1, -1],
}
);
assert_eq!(
report[2],
ulua::CoverageInfo {
function: None,
line_defined: 12,
depth: 1,
hits: vec![-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1],
}
);
assert_eq!(
report[3],
ulua::CoverageInfo {
function: None,
line_defined: 13,
depth: 2,
hits: vec![-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1],
}
);
Ok(())
}
#[test]
fn test_function_pointer() -> Result<()> {
let lua = Lua::new();
let func1 = lua.load("return function() end").into_function()?;
let func2 = func1.call::<Function>(())?;
assert_eq!(func1.to_pointer(), func1.clone().to_pointer());
assert_ne!(func1.to_pointer(), func2.to_pointer());
Ok(())
}
#[test]
fn test_function_deep_clone() -> Result<()> {
let lua = Lua::new();
lua.globals().set("a", 1)?;
let func1 = lua.load("a += 1; return a").into_function()?;
let func2 = func1.deep_clone()?;
assert_ne!(func1.to_pointer(), func2.to_pointer());
assert_eq!(func1.call::<i32>(())?, 2);
assert_eq!(func2.call::<i32>(())?, 3);
let rust_func = lua.create_function(|_, ()| Ok(42))?;
let rust_func2 = rust_func.deep_clone()?;
assert_eq!(rust_func.to_pointer(), rust_func2.to_pointer());
Ok(())
}
#[test]
fn test_function_wrap() -> Result<()> {
let lua = Lua::new();
let f = Function::wrap(|s: String, n| Ok(s.to_str().unwrap().repeat(n)));
lua.globals().set("f", f)?;
lua.load(r#"assert(f("hello", 2) == "hellohello")"#)
.exec()
.unwrap();
let ferr = Function::wrap(|| Err::<(), _>(Error::runtime("some error")));
lua.globals().set("ferr", ferr)?;
lua.load(
r#"
local ok, err = pcall(ferr)
assert(not ok and tostring(err):find("some error"))
"#,
)
.exec()
.unwrap();
let mut i = 0;
let fmut = Function::wrap_mut(move || {
i += 1;
Ok(i)
});
lua.globals().set("fmut", fmut)?;
lua.load(r#"fmut(); fmut(); assert(fmut() == 3)"#).exec().unwrap();
let fmut_err = Function::wrap_mut(|| Err::<(), _>(Error::runtime("some error")));
lua.globals().set("fmut_err", fmut_err)?;
lua.load(
r#"
local ok, err = pcall(fmut_err)
assert(not ok and tostring(err):find("some error"))
"#,
)
.exec()
.unwrap();
let fmut = Function::wrap_mut(|f: Function| match f.call::<()>(&f) {
Err(Error::CallbackError { cause, .. }) => match cause.as_ref() {
Error::RecursiveMutCallback { .. } => Ok(()),
other => panic!("incorrect result: {other:?}"),
},
other => panic!("incorrect result: {other:?}"),
});
let fmut = lua.convert::<Function>(fmut)?;
assert!(fmut.call::<()>(&fmut).is_ok());
Ok(())
}
#[test]
fn test_function_wrap_raw() -> Result<()> {
let lua = Lua::new();
let f = Function::wrap_raw(|| "hello");
lua.globals().set("f", f)?;
lua.load(r#"assert(f() == "hello")"#).exec().unwrap();
let ferr = Function::wrap_raw(|| Err::<(), _>("some error"));
lua.globals().set("ferr", ferr)?;
lua.load(
r#"
local _, err = ferr()
assert(err == "some error")
"#,
)
.exec()
.unwrap();
let mut i = 0;
let fmut = Function::wrap_raw_mut(move || {
i += 1;
i
});
lua.globals().set("fmut", fmut)?;
lua.load(r#"fmut(); fmut(); assert(fmut() == 3)"#).exec().unwrap();
let fmut_err = Function::wrap_raw_mut(|| Err::<(), _>("some error"));
lua.globals().set("fmut_err", fmut_err)?;
lua.load(
r#"
local _, err = fmut_err()
assert(err == "some error")
"#,
)
.exec()
.unwrap();
Ok(())
}