/*
 * Copyright [2022] [Kevin Velasco]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use empty_type::EmptyType;
use empty_type_derive::EmptyType;

#[derive(EmptyType)]
struct TestStruct {
    value: Option<&'static str>,
}

#[derive(EmptyType)]
struct Data(String, usize);

#[test]
fn empty_type_can_be_instantiated() {
    let empty = TestStruct::new_empty();
    assert!(empty.value.is_none());
}

#[test]
fn empty_type_can_be_unwrapped() {
    use std::ops::DerefMut;
    let mut empty = TestStruct::new_empty();
    let ptr = empty.value.deref_mut();
    *ptr = Some("str");

    let unwrapped = empty.resolve();
    assert!(unwrapped.value.is_some());
}