use std::fmt;
use std::result::Result;
use std::error::Error;
use std::panic::catch_unwind;
use super::*;
#[test]
fn test_set_get() {
let lua = Lua::new();
lua.set("foo", "bar").unwrap();
lua.set("baz", "baf").unwrap();
assert_eq!(lua.get::<_, String>("foo").unwrap(), "bar");
assert_eq!(lua.get::<_, String>("baz").unwrap(), "baf");
}
#[test]
fn test_load() {
let lua = Lua::new();
lua.load(r#"
res = 'foo'..'bar'
"#,
None)
.unwrap();
assert_eq!(lua.get::<_, String>("res").unwrap(), "foobar");
}
#[test]
fn test_eval() {
let lua = Lua::new();
assert_eq!(lua.eval::<i32>("1 + 1").unwrap(), 2);
assert_eq!(lua.eval::<bool>("false == false").unwrap(), true);
assert_eq!(lua.eval::<i32>("return 1 + 2").unwrap(), 3);
match lua.eval::<()>("if true then") {
Err(LuaError(LuaErrorKind::IncompleteStatement(_), _)) => {}
r => panic!("expected IncompleteStatement, got {:?}", r),
}
}
#[test]
fn test_table() {
let lua = Lua::new();
lua.set("table", lua.create_empty_table().unwrap()).unwrap();
let table1: LuaTable = lua.get("table").unwrap();
let table2: LuaTable = lua.get("table").unwrap();
table1.set("foo", "bar").unwrap();
table2.set("baz", "baf").unwrap();
assert_eq!(table2.get::<_, String>("foo").unwrap(), "bar");
assert_eq!(table1.get::<_, String>("baz").unwrap(), "baf");
lua.load(r#"
table1 = {1, 2, 3, 4, 5}
table2 = {}
table3 = {1, 2, nil, 4, 5}
"#,
None)
.unwrap();
let table1 = lua.get::<_, LuaTable>("table1").unwrap();
let table2 = lua.get::<_, LuaTable>("table2").unwrap();
let table3 = lua.get::<_, LuaTable>("table3").unwrap();
assert_eq!(table1.length().unwrap(), 5);
assert_eq!(table1.pairs::<i64, i64>().unwrap(),
vec![(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)]);
assert_eq!(table2.length().unwrap(), 0);
assert_eq!(table2.pairs::<i64, i64>().unwrap(), vec![]);
assert_eq!(table2.array_values::<i64>().unwrap(), vec![]);
assert_eq!(table3.length().unwrap(), 5);
assert_eq!(table3.array_values::<Option<i64>>().unwrap(),
vec![Some(1), Some(2), None, Some(4), Some(5)]);
}
#[test]
fn test_function() {
let lua = Lua::new();
lua.load(r#"
function concat(arg1, arg2)
return arg1 .. arg2
end
"#,
None)
.unwrap();
let concat = lua.get::<_, LuaFunction>("concat").unwrap();
assert_eq!(concat.call::<_, String>(lua_multi!["foo", "bar"]).unwrap(),
"foobar");
}
#[test]
fn test_bind() {
let lua = Lua::new();
lua.load(r#"
function concat(...)
local res = ""
for _, s in pairs({...}) do
res = res..s
end
return res
end
"#,
None)
.unwrap();
let mut concat = lua.get::<_, LuaFunction>("concat").unwrap();
concat = concat.bind("foo").unwrap();
concat = concat.bind("bar").unwrap();
concat = concat.bind(lua_multi!["baz", "baf"]).unwrap();
assert_eq!(concat.call::<_, String>(lua_multi!["hi", "wut"]).unwrap(),
"foobarbazbafhiwut");
}
#[test]
fn test_rust_function() {
let lua = Lua::new();
lua.load(r#"
function lua_function()
return rust_function()
end
-- Test to make sure chunk return is ignored
return 1
"#,
None)
.unwrap();
let lua_function = lua.get::<_, LuaFunction>("lua_function").unwrap();
let rust_function = lua.create_function(|lua, _| lua.pack("hello")).unwrap();
lua.set("rust_function", rust_function).unwrap();
assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
}
#[test]
fn test_user_data() {
struct UserData1(i64);
struct UserData2(Box<i64>);
impl LuaUserDataType for UserData1 {};
impl LuaUserDataType for UserData2 {};
let lua = Lua::new();
let userdata1 = lua.create_userdata(UserData1(1)).unwrap();
let userdata2 = lua.create_userdata(UserData2(Box::new(2))).unwrap();
assert!(userdata1.is::<UserData1>());
assert!(!userdata1.is::<UserData2>());
assert!(userdata2.is::<UserData2>());
assert!(!userdata2.is::<UserData1>());
assert_eq!(userdata1.borrow::<UserData1>().unwrap().0, 1);
assert_eq!(*userdata2.borrow::<UserData2>().unwrap().0, 2);
}
#[test]
fn test_methods() {
struct UserData(i64);
impl LuaUserDataType for UserData {
fn add_methods(methods: &mut LuaUserDataMethods<Self>) {
methods.add_method("get_value", |lua, data, _| lua.pack(data.0));
methods.add_method_mut("set_value", |lua, data, args| {
data.0 = lua.unpack(args)?;
lua.pack(())
});
}
}
let lua = Lua::new();
let userdata = lua.create_userdata(UserData(42)).unwrap();
lua.set("userdata", userdata.clone()).unwrap();
lua.load(r#"
function get_it()
return userdata:get_value()
end
function set_it(i)
return userdata:set_value(i)
end
"#,
None)
.unwrap();
let get = lua.get::<_, LuaFunction>("get_it").unwrap();
let set = lua.get::<_, LuaFunction>("set_it").unwrap();
assert_eq!(get.call::<_, i64>(()).unwrap(), 42);
userdata.borrow_mut::<UserData>().unwrap().0 = 64;
assert_eq!(get.call::<_, i64>(()).unwrap(), 64);
set.call::<_, ()>(100).unwrap();
assert_eq!(get.call::<_, i64>(()).unwrap(), 100);
}
#[test]
fn test_metamethods() {
#[derive(Copy, Clone)]
struct UserData(i64);
impl LuaUserDataType for UserData {
fn add_methods(methods: &mut LuaUserDataMethods<Self>) {
methods.add_method("get", |lua, data, _| lua.pack(data.0));
methods.add_meta_function(LuaMetaMethod::Add, |lua, args| {
let lua_multi_pat![lhs, rhs] = lua.unpack::<LuaMulti![UserData, UserData]>(args)?;
lua.pack(UserData(lhs.0 + rhs.0))
});
methods.add_meta_function(LuaMetaMethod::Sub, |lua, args| {
let lua_multi_pat![lhs, rhs] = lua.unpack::<LuaMulti![UserData, UserData]>(args)?;
lua.pack(UserData(lhs.0 - rhs.0))
});
methods.add_meta_method(LuaMetaMethod::Index, |lua, data, args| {
let index = lua.unpack::<LuaString>(args)?;
if index.get()? == "inner" {
lua.pack(data.0)
} else {
Err("no such custom index".into())
}
});
}
}
let lua = Lua::new();
lua.set("userdata1", UserData(7)).unwrap();
lua.set("userdata2", UserData(3)).unwrap();
assert_eq!(lua.eval::<UserData>("userdata1 + userdata2").unwrap().0, 10);
assert_eq!(lua.eval::<UserData>("userdata1 - userdata2").unwrap().0, 4);
assert_eq!(lua.eval::<i64>("userdata1:get()").unwrap(), 7);
assert_eq!(lua.eval::<i64>("userdata2.inner").unwrap(), 3);
assert!(lua.eval::<()>("userdata2.nonexist_field").is_err());
}
#[test]
fn test_scope() {
let lua = Lua::new();
lua.load(r#"
touter = {
tin = {1, 2, 3}
}
"#,
None)
.unwrap();
let tin;
{
let touter = lua.get::<_, LuaTable>("touter").unwrap();
tin = touter.get::<_, LuaTable>("tin").unwrap();
}
assert_eq!(tin.get::<_, i64>(1).unwrap(), 1);
assert_eq!(tin.get::<_, i64>(2).unwrap(), 2);
assert_eq!(tin.get::<_, i64>(3).unwrap(), 3);
}
#[test]
fn test_lua_multi() {
let lua = Lua::new();
lua.load(r#"
function concat(arg1, arg2)
return arg1 .. arg2
end
function mreturn()
return 1, 2, 3, 4, 5, 6
end
"#,
None)
.unwrap();
let concat = lua.get::<_, LuaFunction>("concat").unwrap();
let mreturn = lua.get::<_, LuaFunction>("mreturn").unwrap();
assert_eq!(concat.call::<_, String>(lua_multi!["foo", "bar"]).unwrap(),
"foobar");
let lua_multi_pat![a, b] = mreturn.call::<_, LuaMulti![u64, u64]>(lua_multi![]).unwrap();
assert_eq!((a, b), (1, 2));
let lua_multi_pat![a, b, LuaVariadic(v)] = mreturn.call::<_, LuaMulti![u64, u64, LuaVariadic<u64>]>(lua_multi![]).unwrap();
assert_eq!((a, b), (1, 2));
assert_eq!(v, vec![3, 4, 5, 6]);
}
#[test]
fn test_coercion() {
let lua = Lua::new();
lua.load(r#"
int = 123
str = "123"
num = 123.0
"#,
None)
.unwrap();
assert_eq!(lua.get::<_, String>("int").unwrap(), "123");
assert_eq!(lua.get::<_, i32>("str").unwrap(), 123);
assert_eq!(lua.get::<_, i32>("num").unwrap(), 123);
}
#[test]
fn test_error() {
#[derive(Debug)]
pub struct TestError;
impl fmt::Display for TestError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(fmt, "test error")
}
}
impl Error for TestError {
fn description(&self) -> &str {
"test error"
}
fn cause(&self) -> Option<&Error> {
None
}
}
let lua = Lua::new();
lua.load(r#"
function no_error()
end
function lua_error()
error("this is a lua error")
end
function rust_error()
rust_error_function()
end
function test_pcall()
local testvar = 0
pcall(function(arg)
testvar = testvar + arg
error("should be ignored")
end, 3)
local function handler(err)
testvar = testvar + err
return "should be ignored"
end
xpcall(function()
error(5)
end, handler)
if testvar ~= 8 then
error("testvar had the wrong value, pcall / xpcall misbehaving "..testvar)
end
end
function understand_recursion()
understand_recursion()
end
"#,
None)
.unwrap();
let rust_error_function =
lua.create_function(|_, _| Err(LuaExternalError(Box::new(TestError)).into()))
.unwrap();
lua.set("rust_error_function", rust_error_function).unwrap();
let no_error = lua.get::<_, LuaFunction>("no_error").unwrap();
let lua_error = lua.get::<_, LuaFunction>("lua_error").unwrap();
let rust_error = lua.get::<_, LuaFunction>("rust_error").unwrap();
let test_pcall = lua.get::<_, LuaFunction>("test_pcall").unwrap();
let understand_recursion = lua.get::<_, LuaFunction>("understand_recursion").unwrap();
assert!(no_error.call::<_, ()>(()).is_ok());
match lua_error.call::<_, ()>(()) {
Err(LuaError(LuaErrorKind::ScriptError(_), _)) => {}
Err(_) => panic!("error is not ScriptError kind"),
_ => panic!("error not thrown"),
}
match rust_error.call::<_, ()>(()) {
Err(LuaError(LuaErrorKind::ExternalError(e), _)) => {
assert_eq!(e.description(), "test error")
}
Err(_) => panic!("error is not ExternalError kind"),
_ => panic!("error not thrown"),
}
test_pcall.call::<_, ()>(()).unwrap();
assert!(understand_recursion.call::<_, ()>(()).is_err());
match catch_unwind(|| -> LuaResult<()> {
let lua = Lua::new();
lua.load(r#"
function rust_panic()
pcall(function () rust_panic_function() end)
end
"#,
None)?;
let rust_panic_function = lua.create_function(|_, _| {
panic!("expected panic, this panic should be caught in rust")
})?;
lua.set("rust_panic_function", rust_panic_function)?;
let rust_panic = lua.get::<_, LuaFunction>("rust_panic")?;
rust_panic.call::<_, ()>(())
}) {
Ok(Ok(_)) => panic!("no panic was detected, pcall caught it!"),
Ok(Err(e)) => panic!("error during panic test {:?}", e),
Err(_) => {}
};
match catch_unwind(|| -> LuaResult<()> {
let lua = Lua::new();
lua.load(r#"
function rust_panic()
xpcall(function() rust_panic_function() end, function() end)
end
"#,
None)?;
let rust_panic_function = lua.create_function(|_, _| {
panic!("expected panic, this panic should be caught in rust")
})?;
lua.set("rust_panic_function", rust_panic_function)?;
let rust_panic = lua.get::<_, LuaFunction>("rust_panic")?;
rust_panic.call::<_, ()>(())
}) {
Ok(Ok(_)) => panic!("no panic was detected, xpcall caught it!"),
Ok(Err(e)) => panic!("error during panic test {:?}", e),
Err(_) => {}
};
}