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BTree: simplify test code

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This commit is contained in:
Stein Somers 2022-02-11 01:28:47 +01:00
parent a6fe969541
commit 7950ebcd8e
3 changed files with 118 additions and 138 deletions
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197
library/alloc/src/collections/btree/map/tests.rs
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@ -17,14 +17,10 @@
use std::panic::{catch_unwind, AssertUnwindSafe};
use std::sync::atomic::{AtomicUsize, Ordering::SeqCst};
// Capacity of a tree with a single level,
// i.e., a tree who's root is a leaf node at height 0.
const NODE_CAPACITY: usize = node::CAPACITY;
// Minimum number of elements to insert, to guarantee a tree with 2 levels,
// i.e., a tree who's root is an internal node at height 1, with edges to leaf nodes.
// It's not the minimum size: removing an element from such a tree does not always reduce height.
const MIN_INSERTS_HEIGHT_1: usize = NODE_CAPACITY + 1;
const MIN_INSERTS_HEIGHT_1: usize = node::CAPACITY + 1;
// Minimum number of elements to insert in ascending order, to guarantee a tree with 3 levels,
// i.e., a tree who's root is an internal node at height 2, with edges to more internal nodes.
@ -180,7 +176,7 @@ fn test_levels() {
#[should_panic]
fn test_check_ord_chaos() {
let gov = Governor::new();
let map: BTreeMap<_, _> = (0..2).map(|i| (Governed(i, &gov), ())).collect();
let map = BTreeMap::from([(Governed(1, &gov), ()), (Governed(2, &gov), ())]);
gov.flip();
map.check();
}
@ -189,7 +185,7 @@ fn test_check_ord_chaos() {
#[test]
fn test_check_invariants_ord_chaos() {
let gov = Governor::new();
let map: BTreeMap<_, _> = (0..2).map(|i| (Governed(i, &gov), ())).collect();
let map = BTreeMap::from([(Governed(1, &gov), ()), (Governed(2, &gov), ())]);
gov.flip();
map.check_invariants();
}
@ -337,8 +333,7 @@ fn test_basic_small() {
fn test_iter() {
// Miri is too slow
let size = if cfg!(miri) { 200 } else { 10000 };
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
fn test<T>(size: usize, mut iter: T)
where
@ -360,8 +355,7 @@ fn test<T>(size: usize, mut iter: T)
fn test_iter_rev() {
// Miri is too slow
let size = if cfg!(miri) { 200 } else { 10000 };
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
fn test<T>(size: usize, mut iter: T)
where
@ -386,7 +380,7 @@ fn do_test_iter_mut_mutation<T>(size: usize)
<T as TryFrom<usize>>::Error: Debug,
{
let zero = T::try_from(0).unwrap();
let mut map: BTreeMap<T, T> = (0..size).map(|i| (T::try_from(i).unwrap(), zero)).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (T::try_from(i).unwrap(), zero)));
// Forward and backward iteration sees enough pairs (also tested elsewhere)
assert_eq!(map.iter_mut().count(), size);
@ -452,7 +446,7 @@ fn test_iter_mut_mutation() {
#[test]
fn test_values_mut() {
let mut a: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)).collect();
let mut a = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)));
test_all_refs(&mut 13, a.values_mut());
a.check();
}
@ -467,14 +461,14 @@ fn test_values_mut_mutation() {
value.push_str("!");
}
let values: Vec<String> = a.values().cloned().collect();
let values = Vec::from_iter(a.values().cloned());
assert_eq!(values, [String::from("hello!"), String::from("goodbye!")]);
a.check();
}
#[test]
fn test_iter_entering_root_twice() {
let mut map: BTreeMap<_, _> = (0..2).map(|i| (i, i)).collect();
let mut map = BTreeMap::from([(0, 0), (1, 1)]);
let mut it = map.iter_mut();
let front = it.next().unwrap();
let back = it.next_back().unwrap();
@ -491,7 +485,7 @@ fn test_iter_entering_root_twice() {
#[test]
fn test_iter_descending_to_same_node_twice() {
let mut map: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i)));
let mut it = map.iter_mut();
// Descend into first child.
let front = it.next().unwrap();
@ -509,7 +503,7 @@ fn test_iter_mixed() {
// Miri is too slow
let size = if cfg!(miri) { 200 } else { 10000 };
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
fn test<T>(size: usize, mut iter: T)
where
@ -569,21 +563,19 @@ fn test_iter_min_max() {
}
fn range_keys(map: &BTreeMap<i32, i32>, range: impl RangeBounds<i32>) -> Vec<i32> {
map.range(range)
.map(|(&k, &v)| {
assert_eq!(k, v);
k
})
.collect()
Vec::from_iter(map.range(range).map(|(&k, &v)| {
assert_eq!(k, v);
k
}))
}
#[test]
fn test_range_small() {
let size = 4;
let map: BTreeMap<_, _> = (1..=size).map(|i| (i, i)).collect();
let all: Vec<_> = (1..=size).collect();
let all = Vec::from_iter(1..=size);
let (first, last) = (vec![all[0]], vec![all[size as usize - 1]]);
let map = BTreeMap::from_iter(all.iter().copied().map(|i| (i, i)));
assert_eq!(range_keys(&map, (Excluded(0), Excluded(size + 1))), all);
assert_eq!(range_keys(&map, (Excluded(0), Included(size + 1))), all);
@ -638,10 +630,9 @@ fn test_range_small() {
#[test]
fn test_range_height_1() {
// Tests tree with a root and 2 leaves. The single key in the root node is
// close to the middle among the keys.
let map: BTreeMap<_, _> = (0..MIN_INSERTS_HEIGHT_1 as i32).map(|i| (i, i)).collect();
// Tests tree with a root and 2 leaves. We test around the middle of the
// keys because one of those is the single key in the root node.
let map = BTreeMap::from_iter((0..MIN_INSERTS_HEIGHT_1 as i32).map(|i| (i, i)));
let middle = MIN_INSERTS_HEIGHT_1 as i32 / 2;
for root in middle - 2..=middle + 2 {
assert_eq!(range_keys(&map, (Excluded(root), Excluded(root + 1))), vec![]);
@ -660,9 +651,9 @@ fn test_range_height_1() {
fn test_range_large() {
let size = 200;
let map: BTreeMap<_, _> = (1..=size).map(|i| (i, i)).collect();
let all: Vec<_> = (1..=size).collect();
let all = Vec::from_iter(1..=size);
let (first, last) = (vec![all[0]], vec![all[size as usize - 1]]);
let map = BTreeMap::from_iter(all.iter().copied().map(|i| (i, i)));
assert_eq!(range_keys(&map, (Excluded(0), Excluded(size + 1))), all);
assert_eq!(range_keys(&map, (Excluded(0), Included(size + 1))), all);
@ -715,9 +706,7 @@ fn check<'a, L, R>(lhs: L, rhs: R)
L: IntoIterator<Item = (&'a i32, &'a i32)>,
R: IntoIterator<Item = (&'a i32, &'a i32)>,
{
let lhs: Vec<_> = lhs.into_iter().collect();
let rhs: Vec<_> = rhs.into_iter().collect();
assert_eq!(lhs, rhs);
assert_eq!(Vec::from_iter(lhs), Vec::from_iter(rhs));
}
check(map.range(..=100), map.range(..101));
@ -728,14 +717,13 @@ fn check<'a, L, R>(lhs: L, rhs: R)
#[test]
fn test_range_inclusive_max_value() {
let max = usize::MAX;
let map: BTreeMap<_, _> = [(max, 0)].into_iter().collect();
assert_eq!(map.range(max..=max).collect::<Vec<_>>(), &[(&max, &0)]);
let map = BTreeMap::from([(max, 0)]);
assert_eq!(Vec::from_iter(map.range(max..=max)), &[(&max, &0)]);
}
#[test]
fn test_range_equal_empty_cases() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
assert_eq!(map.range((Included(2), Excluded(2))).next(), None);
assert_eq!(map.range((Excluded(2), Included(2))).next(), None);
}
@ -743,35 +731,35 @@ fn test_range_equal_empty_cases() {
#[test]
#[should_panic]
fn test_range_equal_excluded() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
let _ = map.range((Excluded(2), Excluded(2)));
}
#[test]
#[should_panic]
fn test_range_backwards_1() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
let _ = map.range((Included(3), Included(2)));
}
#[test]
#[should_panic]
fn test_range_backwards_2() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
let _ = map.range((Included(3), Excluded(2)));
}
#[test]
#[should_panic]
fn test_range_backwards_3() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
let _ = map.range((Excluded(3), Included(2)));
}
#[test]
#[should_panic]
fn test_range_backwards_4() {
let map: BTreeMap<_, _> = (0..5).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..5).map(|i| (i, i)));
let _ = map.range((Excluded(3), Excluded(2)));
}
@ -823,7 +811,7 @@ fn borrow(&self) -> &EvilTwin {
}
}
let map = (0..12).map(|i| (CompositeKey(i, EvilTwin(i)), ())).collect::<BTreeMap<_, _>>();
let map = BTreeMap::from_iter((0..12).map(|i| (CompositeKey(i, EvilTwin(i)), ())));
let _ = map.range(EvilTwin(5)..=EvilTwin(7));
}
@ -831,7 +819,7 @@ fn borrow(&self) -> &EvilTwin {
fn test_range_1000() {
// Miri is too slow
let size = if cfg!(miri) { MIN_INSERTS_HEIGHT_2 as u32 } else { 1000 };
let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
fn test(map: &BTreeMap<u32, u32>, size: u32, min: Bound<&u32>, max: Bound<&u32>) {
let mut kvs = map.range((min, max)).map(|(&k, &v)| (k, v));
@ -870,7 +858,7 @@ fn test_range() {
let size = 200;
// Miri is too slow
let step = if cfg!(miri) { 66 } else { 1 };
let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
for i in (0..size).step_by(step) {
for j in (i..size).step_by(step) {
@ -891,7 +879,7 @@ fn test_range_mut() {
let size = 200;
// Miri is too slow
let step = if cfg!(miri) { 66 } else { 1 };
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i, i)));
for i in (0..size).step_by(step) {
for j in (i..size).step_by(step) {
@ -910,7 +898,7 @@ fn test_range_mut() {
#[test]
fn test_retain() {
let mut map: BTreeMap<i32, i32> = (0..100).map(|x| (x, x * 10)).collect();
let mut map = BTreeMap::from_iter((0..100).map(|x| (x, x * 10)));
map.retain(|&k, _| k % 2 == 0);
assert_eq!(map.len(), 50);
@ -934,7 +922,7 @@ fn empty() {
#[test]
fn consumed_keeping_all() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
assert!(map.drain_filter(|_, _| false).eq(iter::empty()));
map.check();
}
@ -943,7 +931,7 @@ fn consumed_keeping_all() {
#[test]
fn consumed_removing_all() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
assert!(map.drain_filter(|_, _| true).eq(pairs));
assert!(map.is_empty());
map.check();
@ -953,7 +941,7 @@ fn consumed_removing_all() {
#[test]
fn mutating_and_keeping() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
assert!(
map.drain_filter(|_, v| {
*v += 6;
@ -970,7 +958,7 @@ fn mutating_and_keeping() {
#[test]
fn mutating_and_removing() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
assert!(
map.drain_filter(|_, v| {
*v += 6;
@ -985,7 +973,7 @@ fn mutating_and_removing() {
#[test]
fn underfull_keeping_all() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| false);
assert!(map.keys().copied().eq(0..3));
map.check();
@ -995,7 +983,7 @@ fn underfull_keeping_all() {
fn underfull_removing_one() {
let pairs = (0..3).map(|i| (i, i));
for doomed in 0..3 {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i == doomed);
assert_eq!(map.len(), 2);
map.check();
@ -1006,7 +994,7 @@ fn underfull_removing_one() {
fn underfull_keeping_one() {
let pairs = (0..3).map(|i| (i, i));
for sacred in 0..3 {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i != sacred);
assert!(map.keys().copied().eq(sacred..=sacred));
map.check();
@ -1016,7 +1004,7 @@ fn underfull_keeping_one() {
#[test]
fn underfull_removing_all() {
let pairs = (0..3).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| true);
assert!(map.is_empty());
map.check();
@ -1024,29 +1012,29 @@ fn underfull_removing_all() {
#[test]
fn height_0_keeping_all() {
let pairs = (0..NODE_CAPACITY).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let pairs = (0..node::CAPACITY).map(|i| (i, i));
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| false);
assert!(map.keys().copied().eq(0..NODE_CAPACITY));
assert!(map.keys().copied().eq(0..node::CAPACITY));
map.check();
}
#[test]
fn height_0_removing_one() {
let pairs = (0..NODE_CAPACITY).map(|i| (i, i));
for doomed in 0..NODE_CAPACITY {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let pairs = (0..node::CAPACITY).map(|i| (i, i));
for doomed in 0..node::CAPACITY {
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i == doomed);
assert_eq!(map.len(), NODE_CAPACITY - 1);
assert_eq!(map.len(), node::CAPACITY - 1);
map.check();
}
}
#[test]
fn height_0_keeping_one() {
let pairs = (0..NODE_CAPACITY).map(|i| (i, i));
for sacred in 0..NODE_CAPACITY {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let pairs = (0..node::CAPACITY).map(|i| (i, i));
for sacred in 0..node::CAPACITY {
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i != sacred);
assert!(map.keys().copied().eq(sacred..=sacred));
map.check();
@ -1055,8 +1043,8 @@ fn height_0_keeping_one() {
#[test]
fn height_0_removing_all() {
let pairs = (0..NODE_CAPACITY).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let pairs = (0..node::CAPACITY).map(|i| (i, i));
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| true);
assert!(map.is_empty());
map.check();
@ -1064,7 +1052,7 @@ fn height_0_removing_all() {
#[test]
fn height_0_keeping_half() {
let mut map: BTreeMap<_, _> = (0..16).map(|i| (i, i)).collect();
let mut map = BTreeMap::from_iter((0..16).map(|i| (i, i)));
assert_eq!(map.drain_filter(|i, _| *i % 2 == 0).count(), 8);
assert_eq!(map.len(), 8);
map.check();
@ -1073,7 +1061,7 @@ fn height_0_keeping_half() {
#[test]
fn height_1_removing_all() {
let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| true);
assert!(map.is_empty());
map.check();
@ -1083,7 +1071,7 @@ fn height_1_removing_all() {
fn height_1_removing_one() {
let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i));
for doomed in 0..MIN_INSERTS_HEIGHT_1 {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i == doomed);
assert_eq!(map.len(), MIN_INSERTS_HEIGHT_1 - 1);
map.check();
@ -1094,7 +1082,7 @@ fn height_1_removing_one() {
fn height_1_keeping_one() {
let pairs = (0..MIN_INSERTS_HEIGHT_1).map(|i| (i, i));
for sacred in 0..MIN_INSERTS_HEIGHT_1 {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i != sacred);
assert!(map.keys().copied().eq(sacred..=sacred));
map.check();
@ -1105,7 +1093,7 @@ fn height_1_keeping_one() {
fn height_2_removing_one() {
let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i));
for doomed in (0..MIN_INSERTS_HEIGHT_2).step_by(12) {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i == doomed);
assert_eq!(map.len(), MIN_INSERTS_HEIGHT_2 - 1);
map.check();
@ -1116,7 +1104,7 @@ fn height_2_removing_one() {
fn height_2_keeping_one() {
let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i));
for sacred in (0..MIN_INSERTS_HEIGHT_2).step_by(12) {
let mut map: BTreeMap<_, _> = pairs.clone().collect();
let mut map = BTreeMap::from_iter(pairs.clone());
map.drain_filter(|i, _| *i != sacred);
assert!(map.keys().copied().eq(sacred..=sacred));
map.check();
@ -1126,7 +1114,7 @@ fn height_2_keeping_one() {
#[test]
fn height_2_removing_all() {
let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i));
let mut map: BTreeMap<_, _> = pairs.collect();
let mut map = BTreeMap::from_iter(pairs);
map.drain_filter(|_, _| true);
assert!(map.is_empty());
map.check();
@ -1287,7 +1275,7 @@ fn split_off<T: Ord>(v: &mut BTreeMap<Box<T>, ()>, t: &T) {
fn test_entry() {
let xs = [(1, 10), (2, 20), (3, 30), (4, 40), (5, 50), (6, 60)];
let mut map: BTreeMap<_, _> = xs.iter().cloned().collect();
let mut map = BTreeMap::from(xs);
// Existing key (insert)
match map.entry(1) {
@ -1415,7 +1403,7 @@ fn cmp(&self, _: &Self) -> Ordering {
#[test]
fn test_clear() {
let mut map = BTreeMap::new();
for &len in &[MIN_INSERTS_HEIGHT_1, MIN_INSERTS_HEIGHT_2, 0, NODE_CAPACITY] {
for &len in &[MIN_INSERTS_HEIGHT_1, MIN_INSERTS_HEIGHT_2, 0, node::CAPACITY] {
for i in 0..len {
map.insert(i, ());
}
@ -1485,7 +1473,7 @@ fn test_clone() {
}
// Test a tree with 2 semi-full levels and a tree with 3 levels.
map = (1..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)).collect();
map = BTreeMap::from_iter((1..MIN_INSERTS_HEIGHT_2).map(|i| (i, i)));
assert_eq!(map.len(), MIN_INSERTS_HEIGHT_2 - 1);
assert_eq!(map, map.clone());
map.insert(0, 0);
@ -1496,14 +1484,11 @@ fn test_clone() {
fn test_clone_panic_leak(size: usize) {
for i in 0..size {
let dummies: Vec<CrashTestDummy> = (0..size).map(|id| CrashTestDummy::new(id)).collect();
let map: BTreeMap<_, ()> = dummies
.iter()
.map(|dummy| {
let panic = if dummy.id == i { Panic::InClone } else { Panic::Never };
(dummy.spawn(panic), ())
})
.collect();
let dummies = Vec::from_iter((0..size).map(|id| CrashTestDummy::new(id)));
let map = BTreeMap::from_iter(dummies.iter().map(|dummy| {
let panic = if dummy.id == i { Panic::InClone } else { Panic::Never };
(dummy.spawn(panic), ())
}));
catch_unwind(|| map.clone()).unwrap_err();
for d in &dummies {
@ -1864,9 +1849,9 @@ fn test_first_last_entry() {
#[test]
fn test_insert_into_full_height_0() {
let size = NODE_CAPACITY;
let size = node::CAPACITY;
for pos in 0..=size {
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i * 2 + 1, ())).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i * 2 + 1, ())));
assert!(map.insert(pos * 2, ()).is_none());
map.check();
}
@ -1874,14 +1859,14 @@ fn test_insert_into_full_height_0() {
#[test]
fn test_insert_into_full_height_1() {
let size = NODE_CAPACITY + 1 + NODE_CAPACITY;
let size = node::CAPACITY + 1 + node::CAPACITY;
for pos in 0..=size {
let mut map: BTreeMap<_, _> = (0..size).map(|i| (i * 2 + 1, ())).collect();
let mut map = BTreeMap::from_iter((0..size).map(|i| (i * 2 + 1, ())));
map.compact();
let root_node = map.root.as_ref().unwrap().reborrow();
assert_eq!(root_node.len(), 1);
assert_eq!(root_node.first_leaf_edge().into_node().len(), NODE_CAPACITY);
assert_eq!(root_node.last_leaf_edge().into_node().len(), NODE_CAPACITY);
assert_eq!(root_node.first_leaf_edge().into_node().len(), node::CAPACITY);
assert_eq!(root_node.last_leaf_edge().into_node().len(), node::CAPACITY);
assert!(map.insert(pos * 2, ()).is_none());
map.check();
@ -2022,7 +2007,7 @@ fn test_split_off_empty_left() {
#[test]
fn test_split_off_tiny_left_height_2() {
let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i));
let mut left: BTreeMap<_, _> = pairs.clone().collect();
let mut left = BTreeMap::from_iter(pairs.clone());
let right = left.split_off(&1);
left.check();
right.check();
@ -2038,7 +2023,7 @@ fn test_split_off_tiny_left_height_2() {
fn test_split_off_tiny_right_height_2() {
let pairs = (0..MIN_INSERTS_HEIGHT_2).map(|i| (i, i));
let last = MIN_INSERTS_HEIGHT_2 - 1;
let mut left: BTreeMap<_, _> = pairs.clone().collect();
let mut left = BTreeMap::from_iter(pairs.clone());
assert_eq!(*left.last_key_value().unwrap().0, last);
let right = left.split_off(&last);
left.check();
@ -2052,7 +2037,7 @@ fn test_split_off_tiny_right_height_2() {
#[test]
fn test_split_off_halfway() {
let mut rng = DeterministicRng::new();
for &len in &[NODE_CAPACITY, 25, 50, 75, 100] {
for &len in &[node::CAPACITY, 25, 50, 75, 100] {
let mut data = Vec::from_iter((0..len).map(|_| (rng.next(), ())));
// Insertion in non-ascending order creates some variation in node length.
let mut map = BTreeMap::from_iter(data.iter().copied());
@ -2112,13 +2097,11 @@ fn test_into_iter_drop_leak_height_0() {
fn test_into_iter_drop_leak_height_1() {
let size = MIN_INSERTS_HEIGHT_1;
for panic_point in vec![0, 1, size - 2, size - 1] {
let dummies: Vec<_> = (0..size).map(|i| CrashTestDummy::new(i)).collect();
let map: BTreeMap<_, _> = (0..size)
.map(|i| {
let panic = if i == panic_point { Panic::InDrop } else { Panic::Never };
(dummies[i].spawn(Panic::Never), dummies[i].spawn(panic))
})
.collect();
let dummies = Vec::from_iter((0..size).map(|i| CrashTestDummy::new(i)));
let map = BTreeMap::from_iter((0..size).map(|i| {
let panic = if i == panic_point { Panic::InDrop } else { Panic::Never };
(dummies[i].spawn(Panic::Never), dummies[i].spawn(panic))
}));
catch_unwind(move || drop(map.into_iter())).unwrap_err();
for i in 0..size {
assert_eq!(dummies[i].dropped(), 2);
@ -2128,9 +2111,8 @@ fn test_into_iter_drop_leak_height_1() {
#[test]
fn test_into_keys() {
let vec = [(1, 'a'), (2, 'b'), (3, 'c')];
let map: BTreeMap<_, _> = vec.into_iter().collect();
let keys: Vec<_> = map.into_keys().collect();
let map = BTreeMap::from([(1, 'a'), (2, 'b'), (3, 'c')]);
let keys = Vec::from_iter(map.into_keys());
assert_eq!(keys.len(), 3);
assert!(keys.contains(&1));
@ -2140,9 +2122,8 @@ fn test_into_keys() {
#[test]
fn test_into_values() {
let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')];
let map: BTreeMap<_, _> = vec.into_iter().collect();
let values: Vec<_> = map.into_values().collect();
let map = BTreeMap::from([(1, 'a'), (2, 'b'), (3, 'c')]);
let values = Vec::from_iter(map.into_values());
assert_eq!(values.len(), 3);
assert!(values.contains(&'a'));

2
library/alloc/src/collections/btree/set.rs
View file

@ -1539,7 +1539,7 @@ fn next(&mut self) -> Option<&'a T> {
fn size_hint(&self) -> (usize, Option<usize>) {
let (a_len, b_len) = self.0.lens();
// No checked_add, because even if a and b refer to the same set,
// and T is an empty type, the storage overhead of sets limits
// and T is a zero-sized type, the storage overhead of sets limits
// the number of elements to less than half the range of usize.
(0, Some(a_len + b_len))
}

57
library/alloc/src/collections/btree/set/tests.rs
View file

@ -91,7 +91,7 @@ fn check_intersection(a: &[i32], b: &[i32], expected: &[i32]) {
return;
}
let large = (0..100).collect::<Vec<_>>();
let large = Vec::from_iter(0..100);
check_intersection(&[], &large, &[]);
check_intersection(&large, &[], &[]);
check_intersection(&[-1], &large, &[]);
@ -107,8 +107,8 @@ fn check_intersection(a: &[i32], b: &[i32], expected: &[i32]) {
#[test]
fn test_intersection_size_hint() {
let x: BTreeSet<i32> = [3, 4].iter().copied().collect();
let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
let x = BTreeSet::from([3, 4]);
let y = BTreeSet::from([1, 2, 3]);
let mut iter = x.intersection(&y);
assert_eq!(iter.size_hint(), (1, Some(1)));
assert_eq!(iter.next(), Some(&3));
@ -145,7 +145,7 @@ fn check_difference(a: &[i32], b: &[i32], expected: &[i32]) {
return;
}
let large = (0..100).collect::<Vec<_>>();
let large = Vec::from_iter(0..100);
check_difference(&[], &large, &[]);
check_difference(&[-1], &large, &[-1]);
check_difference(&[0], &large, &[]);
@ -159,43 +159,43 @@ fn check_difference(a: &[i32], b: &[i32], expected: &[i32]) {
#[test]
fn test_difference_size_hint() {
let s246: BTreeSet<i32> = [2, 4, 6].iter().copied().collect();
let s23456: BTreeSet<i32> = (2..=6).collect();
let s246 = BTreeSet::from([2, 4, 6]);
let s23456 = BTreeSet::from_iter(2..=6);
let mut iter = s246.difference(&s23456);
assert_eq!(iter.size_hint(), (0, Some(3)));
assert_eq!(iter.next(), None);
let s12345: BTreeSet<i32> = (1..=5).collect();
let s12345 = BTreeSet::from_iter(1..=5);
iter = s246.difference(&s12345);
assert_eq!(iter.size_hint(), (0, Some(3)));
assert_eq!(iter.next(), Some(&6));
assert_eq!(iter.size_hint(), (0, Some(0)));
assert_eq!(iter.next(), None);
let s34567: BTreeSet<i32> = (3..=7).collect();
let s34567 = BTreeSet::from_iter(3..=7);
iter = s246.difference(&s34567);
assert_eq!(iter.size_hint(), (0, Some(3)));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.size_hint(), (0, Some(2)));
assert_eq!(iter.next(), None);
let s1: BTreeSet<i32> = (-9..=1).collect();
let s1 = BTreeSet::from_iter(-9..=1);
iter = s246.difference(&s1);
assert_eq!(iter.size_hint(), (3, Some(3)));
let s2: BTreeSet<i32> = (-9..=2).collect();
let s2 = BTreeSet::from_iter(-9..=2);
iter = s246.difference(&s2);
assert_eq!(iter.size_hint(), (2, Some(2)));
assert_eq!(iter.next(), Some(&4));
assert_eq!(iter.size_hint(), (1, Some(1)));
let s23: BTreeSet<i32> = (2..=3).collect();
let s23 = BTreeSet::from([2, 3]);
iter = s246.difference(&s23);
assert_eq!(iter.size_hint(), (1, Some(3)));
assert_eq!(iter.next(), Some(&4));
assert_eq!(iter.size_hint(), (1, Some(1)));
let s4: BTreeSet<i32> = (4..=4).collect();
let s4 = BTreeSet::from([4]);
iter = s246.difference(&s4);
assert_eq!(iter.size_hint(), (2, Some(3)));
assert_eq!(iter.next(), Some(&2));
@ -204,19 +204,19 @@ fn test_difference_size_hint() {
assert_eq!(iter.size_hint(), (0, Some(0)));
assert_eq!(iter.next(), None);
let s56: BTreeSet<i32> = (5..=6).collect();
let s56 = BTreeSet::from([5, 6]);
iter = s246.difference(&s56);
assert_eq!(iter.size_hint(), (1, Some(3)));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.size_hint(), (0, Some(2)));
let s6: BTreeSet<i32> = (6..=19).collect();
let s6 = BTreeSet::from_iter(6..=19);
iter = s246.difference(&s6);
assert_eq!(iter.size_hint(), (2, Some(2)));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.size_hint(), (1, Some(1)));
let s7: BTreeSet<i32> = (7..=19).collect();
let s7 = BTreeSet::from_iter(7..=19);
iter = s246.difference(&s7);
assert_eq!(iter.size_hint(), (3, Some(3)));
}
@ -235,8 +235,8 @@ fn check_symmetric_difference(a: &[i32], b: &[i32], expected: &[i32]) {
#[test]
fn test_symmetric_difference_size_hint() {
let x: BTreeSet<i32> = [2, 4].iter().copied().collect();
let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
let x = BTreeSet::from([2, 4]);
let y = BTreeSet::from([1, 2, 3]);
let mut iter = x.symmetric_difference(&y);
assert_eq!(iter.size_hint(), (0, Some(5)));
assert_eq!(iter.next(), Some(&1));
@ -263,8 +263,8 @@ fn check_union(a: &[i32], b: &[i32], expected: &[i32]) {
#[test]
fn test_union_size_hint() {
let x: BTreeSet<i32> = [2, 4].iter().copied().collect();
let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
let x = BTreeSet::from([2, 4]);
let y = BTreeSet::from([1, 2, 3]);
let mut iter = x.union(&y);
assert_eq!(iter.size_hint(), (3, Some(5)));
assert_eq!(iter.next(), Some(&1));
@ -276,8 +276,8 @@ fn test_union_size_hint() {
#[test]
// Only tests the simple function definition with respect to intersection
fn test_is_disjoint() {
let one = [1].iter().collect::<BTreeSet<_>>();
let two = [2].iter().collect::<BTreeSet<_>>();
let one = BTreeSet::from([1]);
let two = BTreeSet::from([2]);
assert!(one.is_disjoint(&two));
}
@ -285,8 +285,8 @@ fn test_is_disjoint() {
// Also implicitly tests the trivial function definition of is_superset
fn test_is_subset() {
fn is_subset(a: &[i32], b: &[i32]) -> bool {
let set_a = a.iter().collect::<BTreeSet<_>>();
let set_b = b.iter().collect::<BTreeSet<_>>();
let set_a = BTreeSet::from_iter(a.iter());
let set_b = BTreeSet::from_iter(b.iter());
set_a.is_subset(&set_b)
}
@ -310,7 +310,7 @@ fn is_subset(a: &[i32], b: &[i32]) -> bool {
return;
}
let large = (0..100).collect::<Vec<_>>();
let large = Vec::from_iter(0..100);
assert_eq!(is_subset(&[], &large), true);
assert_eq!(is_subset(&large, &[]), false);
assert_eq!(is_subset(&[-1], &large), false);
@ -321,8 +321,7 @@ fn is_subset(a: &[i32], b: &[i32]) -> bool {
#[test]
fn test_retain() {
let xs = [1, 2, 3, 4, 5, 6];
let mut set: BTreeSet<i32> = xs.iter().cloned().collect();
let mut set = BTreeSet::from([1, 2, 3, 4, 5, 6]);
set.retain(|&k| k % 2 == 0);
assert_eq!(set.len(), 3);
assert!(set.contains(&2));
@ -332,8 +331,8 @@ fn test_retain() {
#[test]
fn test_drain_filter() {
let mut x: BTreeSet<_> = [1].iter().copied().collect();
let mut y: BTreeSet<_> = [1].iter().copied().collect();
let mut x = BTreeSet::from([1]);
let mut y = BTreeSet::from([1]);
x.drain_filter(|_| true);
y.drain_filter(|_| false);
@ -417,7 +416,7 @@ fn test_zip() {
fn test_from_iter() {
let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9];
let set: BTreeSet<_> = xs.iter().cloned().collect();
let set = BTreeSet::from_iter(xs.iter());
for x in &xs {
assert!(set.contains(x));