#[test]
fn simple() {
    use vecmerge::vecmerge;

    assert_eq! {
        vecmerge!([1, 2, 3] + [4, 5] + [6]),
        vec![1, 2, 3, 4, 5, 6],
    }

    let a = vec![1, 2, 3];
    let b = vec![6];

    assert_eq! {
        vecmerge!(a + [4, 5] + b),
        vec![1, 2, 3, 4, 5, 6],
    }

    assert_eq! {
        vecmerge!(vec![1, 2, 3] + vec![4, 5, 6]),
        vec![1, 2, 3, 4, 5, 6],
    }

    assert_eq! {
        vecmerge!([Some(1)]? + [None]? + [Some(3)]? + [4, 5, 6]),
        vec![1, 3, 4, 5, 6],
    }

    assert_eq! {
        vecmerge!([Some(1), Some(2), Some(3)]? + [4, 5, 6]),
        vec![1, 2, 3, 4, 5, 6],
    }

    assert_eq! {
        vecmerge!([Some(1), None, Some(3)]? + [4, 5, 6]),
        vec![4, 5, 6],
    }
}