use {Function, Lua, String};

#[test]
fn test_function() {
    let lua = Lua::new();
    let globals = lua.globals();
    lua.exec::<()>(
        r#"
        function concat(arg1, arg2)
            return arg1 .. arg2
        end
    "#,
        None,
    ).unwrap();

    let concat = globals.get::<_, Function>("concat").unwrap();
    assert_eq!(concat.call::<_, String>(("foo", "bar")).unwrap(), "foobar");
}

#[test]
fn test_bind() {
    let lua = Lua::new();
    let globals = lua.globals();
    lua.exec::<()>(
        r#"
        function concat(...)
            local res = ""
            for _, s in pairs({...}) do
                res = res..s
            end
            return res
        end
    "#,
        None,
    ).unwrap();

    let mut concat = globals.get::<_, Function>("concat").unwrap();
    concat = concat.bind("foo").unwrap();
    concat = concat.bind("bar").unwrap();
    concat = concat.bind(("baz", "baf")).unwrap();
    assert_eq!(
        concat.call::<_, String>(("hi", "wut")).unwrap(),
        "foobarbazbafhiwut"
    );
}

#[test]
fn test_rust_function() {
    let lua = Lua::new();
    let globals = lua.globals();
    lua.exec::<()>(
        r#"
        function lua_function()
            return rust_function()
        end

        -- Test to make sure chunk return is ignored
        return 1
    "#,
        None,
    ).unwrap();

    let lua_function = globals.get::<_, Function>("lua_function").unwrap();
    let rust_function = lua.create_function(|_, ()| Ok("hello")).unwrap();

    globals.set("rust_function", rust_function).unwrap();
    assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
}
