132 lines
3.4 KiB
Rust
132 lines
3.4 KiB
Rust
// Copyright 2014 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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use core::cmp::{partial_min, partial_max};
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use core::cmp::Ordering::{Less, Greater, Equal};
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#[test]
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fn test_int_totalord() {
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assert_eq!(5.cmp(&10), Less);
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assert_eq!(10.cmp(&5), Greater);
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assert_eq!(5.cmp(&5), Equal);
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assert_eq!((-5).cmp(&12), Less);
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assert_eq!(12.cmp(&-5), Greater);
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}
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#[test]
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fn test_mut_int_totalord() {
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assert_eq!((&mut 5).cmp(&&mut 10), Less);
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assert_eq!((&mut 10).cmp(&&mut 5), Greater);
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assert_eq!((&mut 5).cmp(&&mut 5), Equal);
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assert_eq!((&mut -5).cmp(&&mut 12), Less);
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assert_eq!((&mut 12).cmp(&&mut -5), Greater);
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}
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#[test]
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fn test_ordering_reverse() {
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assert_eq!(Less.reverse(), Greater);
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assert_eq!(Equal.reverse(), Equal);
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assert_eq!(Greater.reverse(), Less);
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}
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#[test]
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fn test_ordering_order() {
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assert!(Less < Equal);
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assert_eq!(Greater.cmp(&Less), Greater);
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}
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#[test]
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fn test_partial_min() {
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use core::f64::NAN;
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let data_integer = [
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// a, b, result
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(0, 0, Some(0)),
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(1, 0, Some(0)),
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(0, 1, Some(0)),
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(-1, 0, Some(-1)),
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(0, -1, Some(-1))
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];
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let data_float = [
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// a, b, result
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(0.0f64, 0.0f64, Some(0.0f64)),
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(1.0f64, 0.0f64, Some(0.0f64)),
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(0.0f64, 1.0f64, Some(0.0f64)),
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(-1.0f64, 0.0f64, Some(-1.0f64)),
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(0.0f64, -1.0f64, Some(-1.0f64)),
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(NAN, NAN, None),
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(NAN, 1.0f64, None),
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(1.0f64, NAN, None)
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];
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for &(a, b, result) in data_integer.iter() {
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assert!(partial_min(a, b) == result);
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}
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for &(a, b, result) in data_float.iter() {
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assert!(partial_min(a, b) == result);
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}
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}
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#[test]
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fn test_partial_max() {
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use core::f64::NAN;
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let data_integer = [
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// a, b, result
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(0, 0, Some(0)),
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(1, 0, Some(1)),
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(0, 1, Some(1)),
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(-1, 0, Some(0)),
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(0, -1, Some(0))
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];
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let data_float = [
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// a, b, result
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(0.0f64, 0.0f64, Some(0.0f64)),
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(1.0f64, 0.0f64, Some(1.0f64)),
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(0.0f64, 1.0f64, Some(1.0f64)),
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(-1.0f64, 0.0f64, Some(0.0f64)),
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(0.0f64, -1.0f64, Some(0.0f64)),
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(NAN, NAN, None),
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(NAN, 1.0f64, None),
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(1.0f64, NAN, None)
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];
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for &(a, b, result) in data_integer.iter() {
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assert!(partial_max(a, b) == result);
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}
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for &(a, b, result) in data_float.iter() {
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assert!(partial_max(a, b) == result);
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}
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}
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#[test]
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fn test_user_defined_eq() {
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use core::num::SignedInt;
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// Our type.
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struct SketchyNum {
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num : int
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}
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// Our implementation of `PartialEq` to support `==` and `!=`.
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impl PartialEq for SketchyNum {
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// Our custom eq allows numbers which are near each other to be equal! :D
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fn eq(&self, other: &SketchyNum) -> bool {
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(self.num - other.num).abs() < 5
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}
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}
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// Now these binary operators will work when applied!
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assert!(SketchyNum {num: 37} == SketchyNum {num: 34});
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assert!(SketchyNum {num: 25} != SketchyNum {num: 57});
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}
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