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71 lines
2.1 KiB
71 lines
2.1 KiB
// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![cfg(feature = "full-syntax")]
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extern crate num as num_renamed;
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#[macro_use]
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extern crate num_derive;
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#[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
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enum Color {
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Red,
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Blue = 5,
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Green,
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Alpha = (-3 - (-5isize)) - 10,
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}
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#[test]
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fn test_from_primitive_for_enum_with_custom_value() {
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let v: [Option<Color>; 5] = [
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num_renamed::FromPrimitive::from_u64(0),
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num_renamed::FromPrimitive::from_u64(5),
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num_renamed::FromPrimitive::from_u64(6),
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num_renamed::FromPrimitive::from_u64(-8isize as u64),
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num_renamed::FromPrimitive::from_u64(3),
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];
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assert_eq!(
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v,
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[
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Some(Color::Red),
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Some(Color::Blue),
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Some(Color::Green),
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Some(Color::Alpha),
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None
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]
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);
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}
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#[test]
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fn test_to_primitive_for_enum_with_custom_value() {
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let v: [Option<u64>; 4] = [
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num_renamed::ToPrimitive::to_u64(&Color::Red),
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num_renamed::ToPrimitive::to_u64(&Color::Blue),
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num_renamed::ToPrimitive::to_u64(&Color::Green),
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num_renamed::ToPrimitive::to_u64(&Color::Alpha),
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];
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assert_eq!(v, [Some(0), Some(5), Some(6), Some(-8isize as u64)]);
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}
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#[test]
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fn test_reflexive_for_enum_with_custom_value() {
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let before: [u64; 3] = [0, 5, 6];
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let after: Vec<Option<u64>> = before
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.iter()
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.map(|&x| -> Option<Color> { num_renamed::FromPrimitive::from_u64(x) })
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.map(|x| x.and_then(|x| num_renamed::ToPrimitive::to_u64(&x)))
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.collect();
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let before = before.iter().cloned().map(Some).collect::<Vec<_>>();
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assert_eq!(before, after);
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}
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