enum-as-inner 0.7.0

A proc-macro for deriving inner field accessor functions on enums.
Documentation 
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//! Named unit tests for enum_as_inner crate.

use enum_as_inner::EnumAsInner;

pub mod name_collisions {
    #![allow(dead_code, missing_copy_implementations, missing_docs)]
    pub struct Option;
    pub struct Some;
    pub struct None;
    pub struct Result;
    pub struct Ok;
    pub struct Err;
}
#[allow(unused_imports)]
use name_collisions::*;

#[derive(Debug, EnumAsInner, Copy, Clone)]
enum ManyVariants {
    One { one: u32 },
    Two { one: u32, two: i32 },
    Three { one: bool, two: u32, three: i64 },
}

#[test]
fn test_one_named() {
    let mut many = ManyVariants::One { one: 1 };

    assert!(many.is_one());
    assert!(!many.is_two());
    assert!(!many.is_three());

    assert!(many.as_one().is_some());
    assert!(many.as_two().is_none());
    assert!(many.as_three().is_none());

    assert!(many.as_one_mut().is_some());
    assert!(many.as_two_mut().is_none());
    assert!(many.as_three_mut().is_none());

    assert_eq!(*many.as_one().unwrap(), 1_u32);
    assert_eq!(*many.as_one_mut().unwrap(), 1_u32);

    unsafe {
        assert_eq!(*many.as_one_unchecked(), 1_u32);
        assert_eq!(*many.as_one_mut_unchecked(), 1_u32);
    }
}

#[test]
fn test_two_named() {
    let mut many = ManyVariants::Two { one: 1, two: 2 };

    assert!(!many.is_one());
    assert!(many.is_two());
    assert!(!many.is_three());
    assert!(many.as_one().is_none());
    assert!(many.as_two().is_some());
    assert!(many.as_three().is_none());
    assert!(many.as_one_mut().is_none());
    assert!(many.as_two_mut().is_some());
    assert!(many.as_three_mut().is_none());

    assert_eq!(many.as_two().unwrap(), (&1_u32, &2_i32));
    assert_eq!(many.as_two_mut().unwrap(), (&mut 1_u32, &mut 2_i32));
    assert_eq!(many.into_two().unwrap(), (1_u32, 2_i32));

    unsafe {
        assert_eq!(many.as_two_unchecked(), (&1_u32, &2_i32));
        assert_eq!(many.as_two_mut_unchecked(), (&mut 1_u32, &mut 2_i32));
        assert_eq!(many.into_two_unchecked(), (1_u32, 2_i32));
    }
}

#[test]
fn test_three_named() {
    let mut many = ManyVariants::Three {
        one: true,
        two: 1,
        three: 2,
    };

    assert!(!many.is_one());
    assert!(!many.is_two());
    assert!(many.is_three());
    assert!(many.as_one().is_none());
    assert!(many.as_two().is_none());
    assert!(many.as_three().is_some());
    assert!(many.as_one_mut().is_none());
    assert!(many.as_two_mut().is_none());
    assert!(many.as_three_mut().is_some());

    assert_eq!(many.as_three().unwrap(), (&true, &1_u32, &2_i64));
    assert_eq!(
        many.as_three_mut().unwrap(),
        (&mut true, &mut 1_u32, &mut 2_i64)
    );
    assert_eq!(many.into_three().unwrap(), (true, 1_u32, 2_i64));

    unsafe {
        assert_eq!(many.as_three_unchecked(), (&true, &1_u32, &2_i64));
        assert_eq!(
            many.as_three_mut_unchecked(),
            (&mut true, &mut 1_u32, &mut 2_i64)
        );
        assert_eq!(many.into_three_unchecked(), (true, 1_u32, 2_i64));
    }
}