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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use core::cmp::{partial_min, partial_max};
use core::cmp::Ordering::{Less, Greater, Equal};
#[test]
fn test_int_totalord() {
assert_eq!(5.cmp(&10), Less);
assert_eq!(10.cmp(&5), Greater);
assert_eq!(5.cmp(&5), Equal);
assert_eq!((-5).cmp(&12), Less);
assert_eq!(12.cmp(&-5), Greater);
}
#[test]
fn test_mut_int_totalord() {
assert_eq!((&mut 5).cmp(&&mut 10), Less);
assert_eq!((&mut 10).cmp(&&mut 5), Greater);
assert_eq!((&mut 5).cmp(&&mut 5), Equal);
assert_eq!((&mut -5).cmp(&&mut 12), Less);
assert_eq!((&mut 12).cmp(&&mut -5), Greater);
}
#[test]
fn test_ordering_reverse() {
assert_eq!(Less.reverse(), Greater);
assert_eq!(Equal.reverse(), Equal);
assert_eq!(Greater.reverse(), Less);
}
#[test]
fn test_ordering_order() {
assert!(Less < Equal);
assert_eq!(Greater.cmp(&Less), Greater);
}
#[test]
fn test_partial_min() {
use core::f64::NAN;
let data_integer = [
// a, b, result
(0, 0, Some(0)),
(1, 0, Some(0)),
(0, 1, Some(0)),
(-1, 0, Some(-1)),
(0, -1, Some(-1))
];
let data_float = [
// a, b, result
(0.0f64, 0.0f64, Some(0.0f64)),
(1.0f64, 0.0f64, Some(0.0f64)),
(0.0f64, 1.0f64, Some(0.0f64)),
(-1.0f64, 0.0f64, Some(-1.0f64)),
(0.0f64, -1.0f64, Some(-1.0f64)),
(NAN, NAN, None),
(NAN, 1.0f64, None),
(1.0f64, NAN, None)
];
for &(a, b, result) in &data_integer {
assert!(partial_min(a, b) == result);
}
for &(a, b, result) in &data_float {
assert!(partial_min(a, b) == result);
}
}
#[test]
fn test_partial_max() {
use core::f64::NAN;
let data_integer = [
// a, b, result
(0, 0, Some(0)),
(1, 0, Some(1)),
(0, 1, Some(1)),
(-1, 0, Some(0)),
(0, -1, Some(0))
];
let data_float = [
// a, b, result
(0.0f64, 0.0f64, Some(0.0f64)),
(1.0f64, 0.0f64, Some(1.0f64)),
(0.0f64, 1.0f64, Some(1.0f64)),
(-1.0f64, 0.0f64, Some(0.0f64)),
(0.0f64, -1.0f64, Some(0.0f64)),
(NAN, NAN, None),
(NAN, 1.0f64, None),
(1.0f64, NAN, None)
];
for &(a, b, result) in &data_integer {
assert!(partial_max(a, b) == result);
}
for &(a, b, result) in &data_float {
assert!(partial_max(a, b) == result);
}
}
#[test]
fn test_user_defined_eq() {
// Our type.
struct SketchyNum {
num : isize
}
// Our implementation of `PartialEq` to support `==` and `!=`.
impl PartialEq for SketchyNum {
// Our custom eq allows numbers which are near each other to be equal! :D
fn eq(&self, other: &SketchyNum) -> bool {
(self.num - other.num).abs() < 5
}
}
// Now these binary operators will work when applied!
assert!(SketchyNum {num: 37} == SketchyNum {num: 34});
assert!(SketchyNum {num: 25} != SketchyNum {num: 57});
}
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