747 lines
21 KiB
Rust
747 lines
21 KiB
Rust
use super::super::testing::crash_test::{CrashTestDummy, Panic};
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use super::super::testing::rng::DeterministicRng;
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use super::*;
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use crate::vec::Vec;
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use std::cmp::Ordering;
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use std::iter::FromIterator;
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use std::panic::{catch_unwind, AssertUnwindSafe};
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#[test]
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fn test_clone_eq() {
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let mut m = BTreeSet::new();
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m.insert(1);
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m.insert(2);
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assert_eq!(m.clone(), m);
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}
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#[test]
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fn test_iter_min_max() {
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let mut a = BTreeSet::new();
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assert_eq!(a.iter().min(), None);
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assert_eq!(a.iter().max(), None);
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assert_eq!(a.range(..).min(), None);
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assert_eq!(a.range(..).max(), None);
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assert_eq!(a.difference(&BTreeSet::new()).min(), None);
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assert_eq!(a.difference(&BTreeSet::new()).max(), None);
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assert_eq!(a.intersection(&a).min(), None);
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assert_eq!(a.intersection(&a).max(), None);
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assert_eq!(a.symmetric_difference(&BTreeSet::new()).min(), None);
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assert_eq!(a.symmetric_difference(&BTreeSet::new()).max(), None);
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assert_eq!(a.union(&a).min(), None);
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assert_eq!(a.union(&a).max(), None);
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a.insert(1);
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a.insert(2);
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assert_eq!(a.iter().min(), Some(&1));
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assert_eq!(a.iter().max(), Some(&2));
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assert_eq!(a.range(..).min(), Some(&1));
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assert_eq!(a.range(..).max(), Some(&2));
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assert_eq!(a.difference(&BTreeSet::new()).min(), Some(&1));
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assert_eq!(a.difference(&BTreeSet::new()).max(), Some(&2));
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assert_eq!(a.intersection(&a).min(), Some(&1));
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assert_eq!(a.intersection(&a).max(), Some(&2));
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assert_eq!(a.symmetric_difference(&BTreeSet::new()).min(), Some(&1));
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assert_eq!(a.symmetric_difference(&BTreeSet::new()).max(), Some(&2));
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assert_eq!(a.union(&a).min(), Some(&1));
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assert_eq!(a.union(&a).max(), Some(&2));
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}
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fn check<F>(a: &[i32], b: &[i32], expected: &[i32], f: F)
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where
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F: FnOnce(&BTreeSet<i32>, &BTreeSet<i32>, &mut dyn FnMut(&i32) -> bool) -> bool,
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{
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let mut set_a = BTreeSet::new();
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let mut set_b = BTreeSet::new();
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for x in a {
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assert!(set_a.insert(*x))
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}
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for y in b {
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assert!(set_b.insert(*y))
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}
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let mut i = 0;
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f(&set_a, &set_b, &mut |&x| {
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if i < expected.len() {
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assert_eq!(x, expected[i]);
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}
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i += 1;
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true
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});
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assert_eq!(i, expected.len());
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}
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#[test]
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fn test_intersection() {
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fn check_intersection(a: &[i32], b: &[i32], expected: &[i32]) {
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check(a, b, expected, |x, y, f| x.intersection(y).all(f))
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}
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check_intersection(&[], &[], &[]);
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check_intersection(&[1, 2, 3], &[], &[]);
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check_intersection(&[], &[1, 2, 3], &[]);
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check_intersection(&[2], &[1, 2, 3], &[2]);
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check_intersection(&[1, 2, 3], &[2], &[2]);
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check_intersection(&[11, 1, 3, 77, 103, 5, -5], &[2, 11, 77, -9, -42, 5, 3], &[3, 5, 11, 77]);
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if cfg!(miri) {
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// Miri is too slow
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return;
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}
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let large = (0..100).collect::<Vec<_>>();
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check_intersection(&[], &large, &[]);
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check_intersection(&large, &[], &[]);
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check_intersection(&[-1], &large, &[]);
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check_intersection(&large, &[-1], &[]);
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check_intersection(&[0], &large, &[0]);
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check_intersection(&large, &[0], &[0]);
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check_intersection(&[99], &large, &[99]);
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check_intersection(&large, &[99], &[99]);
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check_intersection(&[100], &large, &[]);
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check_intersection(&large, &[100], &[]);
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check_intersection(&[11, 5000, 1, 3, 77, 8924], &large, &[1, 3, 11, 77]);
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}
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#[test]
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fn test_intersection_size_hint() {
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let x: BTreeSet<i32> = [3, 4].iter().copied().collect();
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let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
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let mut iter = x.intersection(&y);
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assert_eq!(iter.size_hint(), (1, Some(1)));
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assert_eq!(iter.next(), Some(&3));
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assert_eq!(iter.size_hint(), (0, Some(0)));
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assert_eq!(iter.next(), None);
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iter = y.intersection(&y);
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assert_eq!(iter.size_hint(), (0, Some(3)));
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assert_eq!(iter.next(), Some(&1));
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assert_eq!(iter.size_hint(), (0, Some(2)));
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}
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#[test]
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fn test_difference() {
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fn check_difference(a: &[i32], b: &[i32], expected: &[i32]) {
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check(a, b, expected, |x, y, f| x.difference(y).all(f))
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}
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check_difference(&[], &[], &[]);
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check_difference(&[1, 12], &[], &[1, 12]);
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check_difference(&[], &[1, 2, 3, 9], &[]);
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check_difference(&[1, 3, 5, 9, 11], &[3, 9], &[1, 5, 11]);
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check_difference(&[1, 3, 5, 9, 11], &[3, 6, 9], &[1, 5, 11]);
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check_difference(&[1, 3, 5, 9, 11], &[0, 1], &[3, 5, 9, 11]);
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check_difference(&[1, 3, 5, 9, 11], &[11, 12], &[1, 3, 5, 9]);
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check_difference(
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&[-5, 11, 22, 33, 40, 42],
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&[-12, -5, 14, 23, 34, 38, 39, 50],
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&[11, 22, 33, 40, 42],
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);
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if cfg!(miri) {
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// Miri is too slow
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return;
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}
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let large = (0..100).collect::<Vec<_>>();
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check_difference(&[], &large, &[]);
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check_difference(&[-1], &large, &[-1]);
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check_difference(&[0], &large, &[]);
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check_difference(&[99], &large, &[]);
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check_difference(&[100], &large, &[100]);
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check_difference(&[11, 5000, 1, 3, 77, 8924], &large, &[5000, 8924]);
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check_difference(&large, &[], &large);
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check_difference(&large, &[-1], &large);
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check_difference(&large, &[100], &large);
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}
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#[test]
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fn test_difference_size_hint() {
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let s246: BTreeSet<i32> = [2, 4, 6].iter().copied().collect();
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let s23456: BTreeSet<i32> = (2..=6).collect();
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let mut iter = s246.difference(&s23456);
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assert_eq!(iter.size_hint(), (0, Some(3)));
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assert_eq!(iter.next(), None);
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let s12345: BTreeSet<i32> = (1..=5).collect();
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iter = s246.difference(&s12345);
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assert_eq!(iter.size_hint(), (0, Some(3)));
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assert_eq!(iter.next(), Some(&6));
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assert_eq!(iter.size_hint(), (0, Some(0)));
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assert_eq!(iter.next(), None);
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let s34567: BTreeSet<i32> = (3..=7).collect();
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iter = s246.difference(&s34567);
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assert_eq!(iter.size_hint(), (0, Some(3)));
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assert_eq!(iter.next(), Some(&2));
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assert_eq!(iter.size_hint(), (0, Some(2)));
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assert_eq!(iter.next(), None);
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let s1: BTreeSet<i32> = (-9..=1).collect();
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iter = s246.difference(&s1);
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assert_eq!(iter.size_hint(), (3, Some(3)));
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let s2: BTreeSet<i32> = (-9..=2).collect();
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iter = s246.difference(&s2);
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assert_eq!(iter.size_hint(), (2, Some(2)));
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assert_eq!(iter.next(), Some(&4));
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assert_eq!(iter.size_hint(), (1, Some(1)));
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let s23: BTreeSet<i32> = (2..=3).collect();
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iter = s246.difference(&s23);
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assert_eq!(iter.size_hint(), (1, Some(3)));
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assert_eq!(iter.next(), Some(&4));
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assert_eq!(iter.size_hint(), (1, Some(1)));
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let s4: BTreeSet<i32> = (4..=4).collect();
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iter = s246.difference(&s4);
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assert_eq!(iter.size_hint(), (2, Some(3)));
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assert_eq!(iter.next(), Some(&2));
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assert_eq!(iter.size_hint(), (1, Some(2)));
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assert_eq!(iter.next(), Some(&6));
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assert_eq!(iter.size_hint(), (0, Some(0)));
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assert_eq!(iter.next(), None);
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let s56: BTreeSet<i32> = (5..=6).collect();
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iter = s246.difference(&s56);
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assert_eq!(iter.size_hint(), (1, Some(3)));
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assert_eq!(iter.next(), Some(&2));
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assert_eq!(iter.size_hint(), (0, Some(2)));
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let s6: BTreeSet<i32> = (6..=19).collect();
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iter = s246.difference(&s6);
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assert_eq!(iter.size_hint(), (2, Some(2)));
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assert_eq!(iter.next(), Some(&2));
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assert_eq!(iter.size_hint(), (1, Some(1)));
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let s7: BTreeSet<i32> = (7..=19).collect();
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iter = s246.difference(&s7);
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assert_eq!(iter.size_hint(), (3, Some(3)));
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}
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#[test]
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fn test_symmetric_difference() {
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fn check_symmetric_difference(a: &[i32], b: &[i32], expected: &[i32]) {
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check(a, b, expected, |x, y, f| x.symmetric_difference(y).all(f))
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}
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check_symmetric_difference(&[], &[], &[]);
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check_symmetric_difference(&[1, 2, 3], &[2], &[1, 3]);
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check_symmetric_difference(&[2], &[1, 2, 3], &[1, 3]);
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check_symmetric_difference(&[1, 3, 5, 9, 11], &[-2, 3, 9, 14, 22], &[-2, 1, 5, 11, 14, 22]);
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}
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#[test]
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fn test_symmetric_difference_size_hint() {
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let x: BTreeSet<i32> = [2, 4].iter().copied().collect();
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let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
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let mut iter = x.symmetric_difference(&y);
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assert_eq!(iter.size_hint(), (0, Some(5)));
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assert_eq!(iter.next(), Some(&1));
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assert_eq!(iter.size_hint(), (0, Some(4)));
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assert_eq!(iter.next(), Some(&3));
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assert_eq!(iter.size_hint(), (0, Some(1)));
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}
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#[test]
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fn test_union() {
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fn check_union(a: &[i32], b: &[i32], expected: &[i32]) {
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check(a, b, expected, |x, y, f| x.union(y).all(f))
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}
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check_union(&[], &[], &[]);
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check_union(&[1, 2, 3], &[2], &[1, 2, 3]);
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check_union(&[2], &[1, 2, 3], &[1, 2, 3]);
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check_union(
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&[1, 3, 5, 9, 11, 16, 19, 24],
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&[-2, 1, 5, 9, 13, 19],
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&[-2, 1, 3, 5, 9, 11, 13, 16, 19, 24],
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);
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}
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#[test]
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fn test_union_size_hint() {
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let x: BTreeSet<i32> = [2, 4].iter().copied().collect();
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let y: BTreeSet<i32> = [1, 2, 3].iter().copied().collect();
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let mut iter = x.union(&y);
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assert_eq!(iter.size_hint(), (3, Some(5)));
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assert_eq!(iter.next(), Some(&1));
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assert_eq!(iter.size_hint(), (2, Some(4)));
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assert_eq!(iter.next(), Some(&2));
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assert_eq!(iter.size_hint(), (1, Some(2)));
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}
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#[test]
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// Only tests the simple function definition with respect to intersection
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fn test_is_disjoint() {
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let one = [1].iter().collect::<BTreeSet<_>>();
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let two = [2].iter().collect::<BTreeSet<_>>();
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assert!(one.is_disjoint(&two));
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}
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#[test]
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// Also implicitly tests the trivial function definition of is_superset
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fn test_is_subset() {
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fn is_subset(a: &[i32], b: &[i32]) -> bool {
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let set_a = a.iter().collect::<BTreeSet<_>>();
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let set_b = b.iter().collect::<BTreeSet<_>>();
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set_a.is_subset(&set_b)
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}
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assert_eq!(is_subset(&[], &[]), true);
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assert_eq!(is_subset(&[], &[1, 2]), true);
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assert_eq!(is_subset(&[0], &[1, 2]), false);
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assert_eq!(is_subset(&[1], &[1, 2]), true);
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assert_eq!(is_subset(&[2], &[1, 2]), true);
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assert_eq!(is_subset(&[3], &[1, 2]), false);
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assert_eq!(is_subset(&[1, 2], &[1]), false);
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assert_eq!(is_subset(&[1, 2], &[1, 2]), true);
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assert_eq!(is_subset(&[1, 2], &[2, 3]), false);
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assert_eq!(
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is_subset(&[-5, 11, 22, 33, 40, 42], &[-12, -5, 11, 14, 22, 23, 33, 34, 38, 39, 40, 42]),
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true
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);
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assert_eq!(is_subset(&[-5, 11, 22, 33, 40, 42], &[-12, -5, 11, 14, 22, 23, 34, 38]), false);
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if cfg!(miri) {
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// Miri is too slow
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return;
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}
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let large = (0..100).collect::<Vec<_>>();
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assert_eq!(is_subset(&[], &large), true);
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assert_eq!(is_subset(&large, &[]), false);
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assert_eq!(is_subset(&[-1], &large), false);
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assert_eq!(is_subset(&[0], &large), true);
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assert_eq!(is_subset(&[1, 2], &large), true);
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assert_eq!(is_subset(&[99, 100], &large), false);
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}
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#[test]
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fn test_retain() {
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let xs = [1, 2, 3, 4, 5, 6];
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let mut set: BTreeSet<i32> = xs.iter().cloned().collect();
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set.retain(|&k| k % 2 == 0);
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assert_eq!(set.len(), 3);
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assert!(set.contains(&2));
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assert!(set.contains(&4));
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assert!(set.contains(&6));
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}
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#[test]
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fn test_drain_filter() {
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let mut x: BTreeSet<_> = [1].iter().copied().collect();
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let mut y: BTreeSet<_> = [1].iter().copied().collect();
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x.drain_filter(|_| true);
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y.drain_filter(|_| false);
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assert_eq!(x.len(), 0);
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assert_eq!(y.len(), 1);
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}
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#[test]
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fn test_drain_filter_drop_panic_leak() {
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let a = CrashTestDummy::new(0);
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let b = CrashTestDummy::new(1);
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let c = CrashTestDummy::new(2);
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let mut set = BTreeSet::new();
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set.insert(a.spawn(Panic::Never));
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set.insert(b.spawn(Panic::InDrop));
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set.insert(c.spawn(Panic::Never));
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catch_unwind(move || drop(set.drain_filter(|dummy| dummy.query(true)))).ok();
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assert_eq!(a.queried(), 1);
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assert_eq!(b.queried(), 1);
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assert_eq!(c.queried(), 0);
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assert_eq!(a.dropped(), 1);
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assert_eq!(b.dropped(), 1);
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assert_eq!(c.dropped(), 1);
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}
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#[test]
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fn test_drain_filter_pred_panic_leak() {
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let a = CrashTestDummy::new(0);
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let b = CrashTestDummy::new(1);
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let c = CrashTestDummy::new(2);
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let mut set = BTreeSet::new();
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set.insert(a.spawn(Panic::Never));
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set.insert(b.spawn(Panic::InQuery));
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set.insert(c.spawn(Panic::InQuery));
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catch_unwind(AssertUnwindSafe(|| drop(set.drain_filter(|dummy| dummy.query(true))))).ok();
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assert_eq!(a.queried(), 1);
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assert_eq!(b.queried(), 1);
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assert_eq!(c.queried(), 0);
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assert_eq!(a.dropped(), 1);
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assert_eq!(b.dropped(), 0);
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assert_eq!(c.dropped(), 0);
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assert_eq!(set.len(), 2);
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assert_eq!(set.first().unwrap().id(), 1);
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assert_eq!(set.last().unwrap().id(), 2);
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}
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#[test]
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fn test_clear() {
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let mut x = BTreeSet::new();
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x.insert(1);
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x.clear();
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assert!(x.is_empty());
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}
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#[test]
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fn test_zip() {
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let mut x = BTreeSet::new();
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x.insert(5);
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x.insert(12);
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x.insert(11);
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let mut y = BTreeSet::new();
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y.insert("foo");
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y.insert("bar");
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let x = x;
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let y = y;
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let mut z = x.iter().zip(&y);
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assert_eq!(z.next().unwrap(), (&5, &("bar")));
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assert_eq!(z.next().unwrap(), (&11, &("foo")));
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assert!(z.next().is_none());
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}
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#[test]
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fn test_from_iter() {
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let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9];
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|
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let set: BTreeSet<_> = xs.iter().cloned().collect();
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|
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for x in &xs {
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assert!(set.contains(x));
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}
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}
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#[test]
|
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fn test_show() {
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let mut set = BTreeSet::new();
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let empty = BTreeSet::<i32>::new();
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|
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set.insert(1);
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set.insert(2);
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let set_str = format!("{:?}", set);
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assert_eq!(set_str, "{1, 2}");
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assert_eq!(format!("{:?}", empty), "{}");
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}
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|
|
#[test]
|
|
fn test_extend_ref() {
|
|
let mut a = BTreeSet::new();
|
|
a.insert(1);
|
|
|
|
a.extend(&[2, 3, 4]);
|
|
|
|
assert_eq!(a.len(), 4);
|
|
assert!(a.contains(&1));
|
|
assert!(a.contains(&2));
|
|
assert!(a.contains(&3));
|
|
assert!(a.contains(&4));
|
|
|
|
let mut b = BTreeSet::new();
|
|
b.insert(5);
|
|
b.insert(6);
|
|
|
|
a.extend(&b);
|
|
|
|
assert_eq!(a.len(), 6);
|
|
assert!(a.contains(&1));
|
|
assert!(a.contains(&2));
|
|
assert!(a.contains(&3));
|
|
assert!(a.contains(&4));
|
|
assert!(a.contains(&5));
|
|
assert!(a.contains(&6));
|
|
}
|
|
|
|
#[test]
|
|
fn test_recovery() {
|
|
#[derive(Debug)]
|
|
struct Foo(&'static str, i32);
|
|
|
|
impl PartialEq for Foo {
|
|
fn eq(&self, other: &Self) -> bool {
|
|
self.0 == other.0
|
|
}
|
|
}
|
|
|
|
impl Eq for Foo {}
|
|
|
|
impl PartialOrd for Foo {
|
|
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
|
|
self.0.partial_cmp(&other.0)
|
|
}
|
|
}
|
|
|
|
impl Ord for Foo {
|
|
fn cmp(&self, other: &Self) -> Ordering {
|
|
self.0.cmp(&other.0)
|
|
}
|
|
}
|
|
|
|
let mut s = BTreeSet::new();
|
|
assert_eq!(s.replace(Foo("a", 1)), None);
|
|
assert_eq!(s.len(), 1);
|
|
assert_eq!(s.replace(Foo("a", 2)), Some(Foo("a", 1)));
|
|
assert_eq!(s.len(), 1);
|
|
|
|
{
|
|
let mut it = s.iter();
|
|
assert_eq!(it.next(), Some(&Foo("a", 2)));
|
|
assert_eq!(it.next(), None);
|
|
}
|
|
|
|
assert_eq!(s.get(&Foo("a", 1)), Some(&Foo("a", 2)));
|
|
assert_eq!(s.take(&Foo("a", 1)), Some(Foo("a", 2)));
|
|
assert_eq!(s.len(), 0);
|
|
|
|
assert_eq!(s.get(&Foo("a", 1)), None);
|
|
assert_eq!(s.take(&Foo("a", 1)), None);
|
|
|
|
assert_eq!(s.iter().next(), None);
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn assert_covariance() {
|
|
fn set<'new>(v: BTreeSet<&'static str>) -> BTreeSet<&'new str> {
|
|
v
|
|
}
|
|
fn iter<'a, 'new>(v: Iter<'a, &'static str>) -> Iter<'a, &'new str> {
|
|
v
|
|
}
|
|
fn into_iter<'new>(v: IntoIter<&'static str>) -> IntoIter<&'new str> {
|
|
v
|
|
}
|
|
fn range<'a, 'new>(v: Range<'a, &'static str>) -> Range<'a, &'new str> {
|
|
v
|
|
}
|
|
// not applied to Difference, Intersection, SymmetricDifference, Union
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn assert_sync() {
|
|
fn set<T: Sync>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v
|
|
}
|
|
|
|
fn iter<T: Sync>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.iter()
|
|
}
|
|
|
|
fn into_iter<T: Sync>(v: BTreeSet<T>) -> impl Sync {
|
|
v.into_iter()
|
|
}
|
|
|
|
fn range<T: Sync + Ord>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.range(..)
|
|
}
|
|
|
|
fn drain_filter<T: Sync + Ord>(v: &mut BTreeSet<T>) -> impl Sync + '_ {
|
|
v.drain_filter(|_| false)
|
|
}
|
|
|
|
fn difference<T: Sync + Ord>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.difference(&v)
|
|
}
|
|
|
|
fn intersection<T: Sync + Ord>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.intersection(&v)
|
|
}
|
|
|
|
fn symmetric_difference<T: Sync + Ord>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.symmetric_difference(&v)
|
|
}
|
|
|
|
fn union<T: Sync + Ord>(v: &BTreeSet<T>) -> impl Sync + '_ {
|
|
v.union(&v)
|
|
}
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn assert_send() {
|
|
fn set<T: Send>(v: BTreeSet<T>) -> impl Send {
|
|
v
|
|
}
|
|
|
|
fn iter<T: Send + Sync>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.iter()
|
|
}
|
|
|
|
fn into_iter<T: Send>(v: BTreeSet<T>) -> impl Send {
|
|
v.into_iter()
|
|
}
|
|
|
|
fn range<T: Send + Sync + Ord>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.range(..)
|
|
}
|
|
|
|
fn drain_filter<T: Send + Ord>(v: &mut BTreeSet<T>) -> impl Send + '_ {
|
|
v.drain_filter(|_| false)
|
|
}
|
|
|
|
fn difference<T: Send + Sync + Ord>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.difference(&v)
|
|
}
|
|
|
|
fn intersection<T: Send + Sync + Ord>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.intersection(&v)
|
|
}
|
|
|
|
fn symmetric_difference<T: Send + Sync + Ord>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.symmetric_difference(&v)
|
|
}
|
|
|
|
fn union<T: Send + Sync + Ord>(v: &BTreeSet<T>) -> impl Send + '_ {
|
|
v.union(&v)
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_ord_absence() {
|
|
fn set<K>(mut set: BTreeSet<K>) {
|
|
let _ = set.is_empty();
|
|
let _ = set.len();
|
|
set.clear();
|
|
let _ = set.iter();
|
|
let _ = set.into_iter();
|
|
}
|
|
|
|
fn set_debug<K: Debug>(set: BTreeSet<K>) {
|
|
format!("{:?}", set);
|
|
format!("{:?}", set.iter());
|
|
format!("{:?}", set.into_iter());
|
|
}
|
|
|
|
fn set_clone<K: Clone>(mut set: BTreeSet<K>) {
|
|
set.clone_from(&set.clone());
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
struct NonOrd;
|
|
set(BTreeSet::<NonOrd>::new());
|
|
set_debug(BTreeSet::<NonOrd>::new());
|
|
set_clone(BTreeSet::<NonOrd>::default());
|
|
}
|
|
|
|
#[test]
|
|
fn test_append() {
|
|
let mut a = BTreeSet::new();
|
|
a.insert(1);
|
|
a.insert(2);
|
|
a.insert(3);
|
|
|
|
let mut b = BTreeSet::new();
|
|
b.insert(3);
|
|
b.insert(4);
|
|
b.insert(5);
|
|
|
|
a.append(&mut b);
|
|
|
|
assert_eq!(a.len(), 5);
|
|
assert_eq!(b.len(), 0);
|
|
|
|
assert_eq!(a.contains(&1), true);
|
|
assert_eq!(a.contains(&2), true);
|
|
assert_eq!(a.contains(&3), true);
|
|
assert_eq!(a.contains(&4), true);
|
|
assert_eq!(a.contains(&5), true);
|
|
}
|
|
|
|
#[test]
|
|
fn test_first_last() {
|
|
let mut a = BTreeSet::new();
|
|
assert_eq!(a.first(), None);
|
|
assert_eq!(a.last(), None);
|
|
a.insert(1);
|
|
assert_eq!(a.first(), Some(&1));
|
|
assert_eq!(a.last(), Some(&1));
|
|
a.insert(2);
|
|
assert_eq!(a.first(), Some(&1));
|
|
assert_eq!(a.last(), Some(&2));
|
|
for i in 3..=12 {
|
|
a.insert(i);
|
|
}
|
|
assert_eq!(a.first(), Some(&1));
|
|
assert_eq!(a.last(), Some(&12));
|
|
assert_eq!(a.pop_first(), Some(1));
|
|
assert_eq!(a.pop_last(), Some(12));
|
|
assert_eq!(a.pop_first(), Some(2));
|
|
assert_eq!(a.pop_last(), Some(11));
|
|
assert_eq!(a.pop_first(), Some(3));
|
|
assert_eq!(a.pop_last(), Some(10));
|
|
assert_eq!(a.pop_first(), Some(4));
|
|
assert_eq!(a.pop_first(), Some(5));
|
|
assert_eq!(a.pop_first(), Some(6));
|
|
assert_eq!(a.pop_first(), Some(7));
|
|
assert_eq!(a.pop_first(), Some(8));
|
|
assert_eq!(a.clone().pop_last(), Some(9));
|
|
assert_eq!(a.pop_first(), Some(9));
|
|
assert_eq!(a.pop_first(), None);
|
|
assert_eq!(a.pop_last(), None);
|
|
}
|
|
|
|
// Unlike the function with the same name in map/tests, returns no values.
|
|
// Which also means it returns different predetermined pseudo-random keys,
|
|
// and the test cases using this function explore slightly different trees.
|
|
fn rand_data(len: usize) -> Vec<u32> {
|
|
let mut rng = DeterministicRng::new();
|
|
Vec::from_iter((0..len).map(|_| rng.next()))
|
|
}
|
|
|
|
#[test]
|
|
fn test_split_off_empty_right() {
|
|
let mut data = rand_data(173);
|
|
|
|
let mut set = BTreeSet::from_iter(data.clone());
|
|
let right = set.split_off(&(data.iter().max().unwrap() + 1));
|
|
|
|
data.sort();
|
|
assert!(set.into_iter().eq(data));
|
|
assert!(right.into_iter().eq(None));
|
|
}
|
|
|
|
#[test]
|
|
fn test_split_off_empty_left() {
|
|
let mut data = rand_data(314);
|
|
|
|
let mut set = BTreeSet::from_iter(data.clone());
|
|
let right = set.split_off(data.iter().min().unwrap());
|
|
|
|
data.sort();
|
|
assert!(set.into_iter().eq(None));
|
|
assert!(right.into_iter().eq(data));
|
|
}
|
|
|
|
#[test]
|
|
fn test_split_off_large_random_sorted() {
|
|
// Miri is too slow
|
|
let mut data = if cfg!(miri) { rand_data(529) } else { rand_data(1529) };
|
|
// special case with maximum height.
|
|
data.sort();
|
|
|
|
let mut set = BTreeSet::from_iter(data.clone());
|
|
let key = data[data.len() / 2];
|
|
let right = set.split_off(&key);
|
|
|
|
assert!(set.into_iter().eq(data.clone().into_iter().filter(|x| *x < key)));
|
|
assert!(right.into_iter().eq(data.into_iter().filter(|x| *x >= key)));
|
|
}
|
|
|
|
#[test]
|
|
fn from_array() {
|
|
let set = BTreeSet::from([1, 2, 3, 4]);
|
|
let unordered_duplicates = BTreeSet::from([4, 1, 4, 3, 2]);
|
|
assert_eq!(set, unordered_duplicates);
|
|
}
|