1 // Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 #![cfg(feature = "full-syntax")]
12
13 extern crate num as num_renamed;
14 #[macro_use]
15 extern crate num_derive;
16
17 #[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
18 enum Color {
19 Red,
20 Blue = 5,
21 Green,
22 Alpha = (-3 - (-5isize)) - 10,
23 }
24
25 #[test]
test_from_primitive_for_enum_with_custom_value()26 fn test_from_primitive_for_enum_with_custom_value() {
27 let v: [Option<Color>; 5] = [
28 num_renamed::FromPrimitive::from_u64(0),
29 num_renamed::FromPrimitive::from_u64(5),
30 num_renamed::FromPrimitive::from_u64(6),
31 num_renamed::FromPrimitive::from_u64(-8isize as u64),
32 num_renamed::FromPrimitive::from_u64(3),
33 ];
34
35 assert_eq!(
36 v,
37 [
38 Some(Color::Red),
39 Some(Color::Blue),
40 Some(Color::Green),
41 Some(Color::Alpha),
42 None
43 ]
44 );
45 }
46
47 #[test]
test_to_primitive_for_enum_with_custom_value()48 fn test_to_primitive_for_enum_with_custom_value() {
49 let v: [Option<u64>; 4] = [
50 num_renamed::ToPrimitive::to_u64(&Color::Red),
51 num_renamed::ToPrimitive::to_u64(&Color::Blue),
52 num_renamed::ToPrimitive::to_u64(&Color::Green),
53 num_renamed::ToPrimitive::to_u64(&Color::Alpha),
54 ];
55
56 assert_eq!(v, [Some(0), Some(5), Some(6), Some(-8isize as u64)]);
57 }
58
59 #[test]
test_reflexive_for_enum_with_custom_value()60 fn test_reflexive_for_enum_with_custom_value() {
61 let before: [u64; 3] = [0, 5, 6];
62 let after: Vec<Option<u64>> = before
63 .iter()
64 .map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) })
65 .map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x)))
66 .collect();
67 let before = before.iter().cloned().map(Some).collect::<Vec<_>>();
68
69 assert_eq!(before, after);
70 }
71