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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::ops::{Range, RangeFull, RangeFrom, RangeTo, RangeInclusive};
// Test the Range structs without the syntactic sugar.
#[test]
fn test_range() {
let r = Range { start: 2, end: 10 };
let mut count = 0;
for (i, ri) in r.enumerate() {
assert!(ri == i + 2);
assert!(ri >= 2 && ri < 10);
count += 1;
}
assert!(count == 8);
}
#[test]
fn test_range_from() {
let r = RangeFrom { start: 2 };
let mut count = 0;
for (i, ri) in r.take(10).enumerate() {
assert!(ri == i + 2);
assert!(ri >= 2 && ri < 12);
count += 1;
}
assert!(count == 10);
}
#[test]
fn test_range_to() {
// Not much to test.
let _ = RangeTo { end: 42 };
}
#[test]
fn test_full_range() {
// Not much to test.
let _ = RangeFull;
}
#[test]
fn test_range_inclusive() {
let mut r = RangeInclusive { start: 1i8, end: 2 };
assert_eq!(r.next(), Some(1));
assert_eq!(r.next(), Some(2));
assert_eq!(r.next(), None);
r = RangeInclusive { start: 127i8, end: 127 };
assert_eq!(r.next(), Some(127));
assert_eq!(r.next(), None);
r = RangeInclusive { start: -128i8, end: -128 };
assert_eq!(r.next_back(), Some(-128));
assert_eq!(r.next_back(), None);
// degenerate
r = RangeInclusive { start: 1, end: -1 };
assert_eq!(r.size_hint(), (0, Some(0)));
assert_eq!(r.next(), None);
}
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