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#![feature(trace_macros)]
extern crate is_sorted;
use is_sorted::IsSorted;
extern crate rand;
use rand::{thread_rng, Rng};
macro_rules! test_float {
($name:ident, $id:ident, $cmp_t:ident) => {
#[test]
#[allow(unused_mut, unused_macros, dead_code)]
fn $name() {
#[cfg(feature = "unstable")]
macro_rules! cmp_lt {
() => {
::is_sorted::Increasing
};
}
#[cfg(not(feature = "unstable"))]
macro_rules! cmp_lt {
() => {
|a, b| a.partial_cmp(b)
};
}
#[cfg(feature = "unstable")]
macro_rules! cmp_gt {
() => {
::is_sorted::Decreasing
};
}
#[cfg(not(feature = "unstable"))]
macro_rules! cmp_gt {
() => {
|a, b| a.partial_cmp(b).map(|v| v.reverse())
};
}
macro_rules! rev {
(cmp_gt,$i: ident) => {
$i.reverse();
};
($_o: ident,$i: ident) => {};
}
fn random_vec(x: usize) -> Vec<$id> {
let mut vec = Vec::with_capacity(x);
let mut rng = thread_rng();
for _ in 0..x {
let val: $id = rng.gen_range(0. as $id, 1. as $id);
vec.push(val);
}
vec
}
let mut x = [1., 2., 3., 4.];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x: [$id; 0] = [];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x = [0 as $id];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let max = ::std::$id::INFINITY;
let min = -max;
let mut x = [min, max];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x = [1 as $id, 2., 3., 4.];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x = [1 as $id, 3., 2., 4.];
rev!($cmp_t, x);
assert!(!IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x = [4 as $id, 3., 2., 1.];
rev!($cmp_t, x);
assert!(!IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut x = [4 as $id, 4., 4., 4.];
rev!($cmp_t, x);
assert!(IsSorted::is_sorted_by(&mut x.iter(), $cmp_t!()));
let mut v = Vec::new();
for _ in 0..2 {
v.push(min);
}
for _ in 0..2 {
v.push(max);
}
rev!($cmp_t, v);
assert!(IsSorted::is_sorted_by(
&mut v.as_slice().iter(),
$cmp_t!()
));
let mut v = Vec::new();
for _ in 0..4 {
v.push(min);
}
for _ in 0..5 {
v.push(max);
}
rev!($cmp_t, v);
assert!(IsSorted::is_sorted_by(
&mut v.as_slice().iter(),
$cmp_t!()
));
macro_rules! min_max {
(cmp_lt,$min_: ident,$max_: ident) => {{
($min_, $max_)
}};
(cmp_gt,$min_: ident,$max_: ident) => {{
($max_, $min_)
}};
}
/*
let (min, max) = min_max!($cmp_t, min, max);
for i in 0..1_000 {
let mut vec: Vec<$id> = random_vec(i);
vec.sort_by($cmp_t!());
assert!(
vec.as_slice().iter().is_sorted_by($cmp_t!()),
"is_sorted0: {:?}",
vec
);
if i > 4 {
vec.push(min);
assert!(
!vec.as_slice().iter().is_sorted_by($cmp_t!()),
"!is_sorted1: {:?}",
vec
);
vec.insert(i / 3 * 2, min);
assert!(
!vec.as_slice().iter().is_sorted_by($cmp_t!()),
"!is_sorted2: {:?}",
vec
);
vec.insert(0, max);
assert!(
!vec.as_slice().iter().is_sorted_by($cmp_t!()),
"!is_sorted3: {:?}",
vec
);
}
}
*/
}
};
}
test_float!(test_lt_f32, f32, cmp_lt);
test_float!(test_lt_f64, f64, cmp_lt);
test_float!(test_gt_f32, f32, cmp_gt);
test_float!(test_gt_f64, f64, cmp_gt);
#[test]
fn exphp_tests() {
macro_rules! check {
($vec:expr, $cmp_lt:expr, $cmp_gt:expr) => {
let mut v = $vec;
// Test the small vector
assert!(
!IsSorted::is_sorted_by(&mut v.iter(), $cmp_lt),
"{:?}",
v
);
v.reverse();
assert!(
!IsSorted::is_sorted_by(&mut v.iter(), $cmp_gt),
"{:?}",
v
);
v.reverse();
// Test a large vector with the pattern in the middle
let mut o = Vec::new();
for _ in 0..100 {
o.push(0.0);
}
o.append(&mut v);
for _ in 0..100 {
o.push(10.0);
}
assert!(!IsSorted::is_sorted_by(&mut o.iter(), $cmp_lt));
o.reverse();
assert!(!IsSorted::is_sorted_by(&mut o.iter(), $cmp_gt));
};
}
macro_rules! exphp {
($id:ident, $cmp_lt:expr, $cmp_gt:expr) => {
let nan = ::std::$id::NAN;
check!(vec![nan, nan, nan], $cmp_lt, $cmp_gt);
check!(vec![1.0, nan, 2.0], $cmp_lt, $cmp_gt);
check!(vec![2.0, nan, 1.0], $cmp_lt, $cmp_gt);
check!(vec![2.0, nan, 1.0, 7.0], $cmp_lt, $cmp_gt);
check!(vec![2.0, nan, 1.0, 0.0], $cmp_lt, $cmp_gt);
check!(vec![-nan, -1.0, 0.0, 1.0, nan], $cmp_lt, $cmp_gt);
check!(vec![nan, -nan, -1.0, 0.0, 1.0], $cmp_lt, $cmp_gt);
check!(vec![1.0, nan, -nan, -1.0, 0.0], $cmp_lt, $cmp_gt);
check!(vec![0.0, 1.0, nan, -nan, -1.0], $cmp_lt, $cmp_gt);
check!(vec![-1.0, 0.0, 1.0, nan, -nan], $cmp_lt, $cmp_gt);
};
}
exphp!(f32, |a, b| a.partial_cmp(b), |a, b| a
.partial_cmp(b)
.map(|v| v.reverse()));
exphp!(f64, |a, b| a.partial_cmp(b), |a, b| a
.partial_cmp(b)
.map(|v| v.reverse()));
#[cfg(feature = "unstable")]
{
exphp!(f32, is_sorted::Increasing, is_sorted::Decreasing);
exphp!(f64, is_sorted::Increasing, is_sorted::Decreasing);
}
}