use enum_utils::IterVariants;

#[derive(Debug, IterVariants, PartialEq, Eq)]
#[repr(u32)]
enum LargeDiscriminant {
    MaxMinusOne = 0xffff_fffe,
    Max = 0xffff_ffff,
}

#[test]
fn large_discriminant() {
    use self::LargeDiscriminant::*;

    assert_eq!(vec![MaxMinusOne, Max],
               LargeDiscriminant::iter().collect::<Vec<_>>());
}

#[derive(Debug, Clone, IterVariants, PartialEq, Eq)]
#[repr(u8)]
enum Zst {
    Singleton,
}

#[test]
fn zst() {
    assert_eq!(vec![Zst::Singleton],
               Zst::iter().collect::<Vec<_>>());
}

#[derive(Debug, IterVariants, PartialEq, Eq)]
enum Empty {}

#[test]
fn empty() {
    assert_eq!(Vec::<Empty>::new(),
               Empty::iter().collect::<Vec<Empty>>());
}

#[derive(Debug, Clone, IterVariants, PartialEq, Eq)]
#[repr(u8)]
#[allow(unused)]
enum SkipCLike {
    A,
    #[enumeration(skip)]
    B,
    C,
}

#[test]
fn skip_c_like() {
    use self::SkipCLike::*;
    assert_eq!(vec![A, C],
               SkipCLike::iter().collect::<Vec<_>>());
}

#[derive(Debug, IterVariants, PartialEq, Eq)]
#[repr(C, u16)]
#[repr(align(2))]
enum MultiRepr {
    A,
    B,
}

#[test]
fn multi_repr() {
    use self::MultiRepr::*;

    assert_eq!(vec![A, B],
               MultiRepr::iter().collect::<Vec<_>>());
}