Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 697 insertions, 0 deletions

diff --git a/third_party/rust/hashbrown/tests/hasher.rs b/third_party/rust/hashbrown/tests/hasher.rs
new file mode 100644
index 0000000000..e455e3d3c9
--- /dev/null
+++ b/third_party/rust/hashbrown/tests/hasher.rs
@@ -0,0 +1,65 @@
+//! Sanity check that alternate hashers work correctly.
+
+#![cfg(not(miri))] // FIXME: takes too long
+
+use hashbrown::HashSet;
+use std::hash::{BuildHasher, BuildHasherDefault, Hasher};
+
+fn check<S: BuildHasher + Default>() {
+    let range = 0..1_000;
+
+    let mut set = HashSet::<i32, S>::default();
+    set.extend(range.clone());
+
+    assert!(!set.contains(&i32::min_value()));
+    assert!(!set.contains(&(range.start - 1)));
+    for i in range.clone() {
+        assert!(set.contains(&i));
+    }
+    assert!(!set.contains(&range.end));
+    assert!(!set.contains(&i32::max_value()));
+}
+
+/// Use hashbrown's default hasher.
+#[test]
+fn default() {
+    check::<hashbrown::hash_map::DefaultHashBuilder>();
+}
+
+/// Use std's default hasher.
+#[test]
+fn random_state() {
+    check::<std::collections::hash_map::RandomState>();
+}
+
+/// Use a constant 0 hash.
+#[test]
+fn zero() {
+    #[derive(Default)]
+    struct ZeroHasher;
+
+    impl Hasher for ZeroHasher {
+        fn finish(&self) -> u64 {
+            0
+        }
+        fn write(&mut self, _: &[u8]) {}
+    }
+
+    check::<BuildHasherDefault<ZeroHasher>>();
+}
+
+/// Use a constant maximum hash.
+#[test]
+fn max() {
+    #[derive(Default)]
+    struct MaxHasher;
+
+    impl Hasher for MaxHasher {
+        fn finish(&self) -> u64 {
+            u64::max_value()
+        }
+        fn write(&mut self, _: &[u8]) {}
+    }
+
+    check::<BuildHasherDefault<MaxHasher>>();
+}
diff --git a/third_party/rust/hashbrown/tests/rayon.rs b/third_party/rust/hashbrown/tests/rayon.rs
new file mode 100644
index 0000000000..8c603c5c41
--- /dev/null
+++ b/third_party/rust/hashbrown/tests/rayon.rs
@@ -0,0 +1,533 @@
+#![cfg(feature = "rayon")]
+
+#[macro_use]
+extern crate lazy_static;
+
+use hashbrown::{HashMap, HashSet};
+use rayon::iter::{
+    IntoParallelIterator, IntoParallelRefIterator, IntoParallelRefMutIterator, ParallelExtend,
+    ParallelIterator,
+};
+
+macro_rules! assert_eq3 {
+    ($e1:expr, $e2:expr, $e3:expr) => {{
+        assert_eq!($e1, $e2);
+        assert_eq!($e1, $e3);
+        assert_eq!($e2, $e3);
+    }};
+}
+
+lazy_static! {
+    static ref MAP_EMPTY: HashMap<char, u32> = HashMap::new();
+    static ref MAP: HashMap<char, u32> = {
+        let mut m = HashMap::new();
+        m.insert('b', 20);
+        m.insert('a', 10);
+        m.insert('c', 30);
+        m.insert('e', 50);
+        m.insert('f', 60);
+        m.insert('d', 40);
+        m
+    };
+}
+
+#[test]
+fn map_seq_par_equivalence_iter_empty() {
+    let vec_seq = MAP_EMPTY.iter().collect::<Vec<_>>();
+    let vec_par = MAP_EMPTY.par_iter().collect::<Vec<_>>();
+
+    assert_eq3!(vec_seq, vec_par, []);
+}
+
+#[test]
+fn map_seq_par_equivalence_iter() {
+    let mut vec_seq = MAP.iter().collect::<Vec<_>>();
+    let mut vec_par = MAP.par_iter().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [
+        (&'a', &10),
+        (&'b', &20),
+        (&'c', &30),
+        (&'d', &40),
+        (&'e', &50),
+        (&'f', &60),
+    ];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn map_seq_par_equivalence_keys_empty() {
+    let vec_seq = MAP_EMPTY.keys().collect::<Vec<&char>>();
+    let vec_par = MAP_EMPTY.par_keys().collect::<Vec<&char>>();
+
+    let expected: [&char; 0] = [];
+
+    assert_eq3!(vec_seq, vec_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_keys() {
+    let mut vec_seq = MAP.keys().collect::<Vec<_>>();
+    let mut vec_par = MAP.par_keys().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [&'a', &'b', &'c', &'d', &'e', &'f'];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn map_seq_par_equivalence_values_empty() {
+    let vec_seq = MAP_EMPTY.values().collect::<Vec<_>>();
+    let vec_par = MAP_EMPTY.par_values().collect::<Vec<_>>();
+
+    let expected: [&u32; 0] = [];
+
+    assert_eq3!(vec_seq, vec_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_values() {
+    let mut vec_seq = MAP.values().collect::<Vec<_>>();
+    let mut vec_par = MAP.par_values().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [&10, &20, &30, &40, &50, &60];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn map_seq_par_equivalence_iter_mut_empty() {
+    let mut map1 = MAP_EMPTY.clone();
+    let mut map2 = MAP_EMPTY.clone();
+
+    let vec_seq = map1.iter_mut().collect::<Vec<_>>();
+    let vec_par = map2.par_iter_mut().collect::<Vec<_>>();
+
+    assert_eq3!(vec_seq, vec_par, []);
+}
+
+#[test]
+fn map_seq_par_equivalence_iter_mut() {
+    let mut map1 = MAP.clone();
+    let mut map2 = MAP.clone();
+
+    let mut vec_seq = map1.iter_mut().collect::<Vec<_>>();
+    let mut vec_par = map2.par_iter_mut().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [
+        (&'a', &mut 10),
+        (&'b', &mut 20),
+        (&'c', &mut 30),
+        (&'d', &mut 40),
+        (&'e', &mut 50),
+        (&'f', &mut 60),
+    ];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn map_seq_par_equivalence_values_mut_empty() {
+    let mut map1 = MAP_EMPTY.clone();
+    let mut map2 = MAP_EMPTY.clone();
+
+    let vec_seq = map1.values_mut().collect::<Vec<_>>();
+    let vec_par = map2.par_values_mut().collect::<Vec<_>>();
+
+    let expected: [&u32; 0] = [];
+
+    assert_eq3!(vec_seq, vec_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_values_mut() {
+    let mut map1 = MAP.clone();
+    let mut map2 = MAP.clone();
+
+    let mut vec_seq = map1.values_mut().collect::<Vec<_>>();
+    let mut vec_par = map2.par_values_mut().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [&mut 10, &mut 20, &mut 30, &mut 40, &mut 50, &mut 60];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn map_seq_par_equivalence_into_iter_empty() {
+    let vec_seq = MAP_EMPTY.clone().into_iter().collect::<Vec<_>>();
+    let vec_par = MAP_EMPTY.clone().into_par_iter().collect::<Vec<_>>();
+
+    assert_eq3!(vec_seq, vec_par, []);
+}
+
+#[test]
+fn map_seq_par_equivalence_into_iter() {
+    let mut vec_seq = MAP.clone().into_iter().collect::<Vec<_>>();
+    let mut vec_par = MAP.clone().into_par_iter().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [
+        ('a', 10),
+        ('b', 20),
+        ('c', 30),
+        ('d', 40),
+        ('e', 50),
+        ('f', 60),
+    ];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+lazy_static! {
+    static ref MAP_VEC_EMPTY: Vec<(char, u32)> = vec![];
+    static ref MAP_VEC: Vec<(char, u32)> = vec![
+        ('b', 20),
+        ('a', 10),
+        ('c', 30),
+        ('e', 50),
+        ('f', 60),
+        ('d', 40),
+    ];
+}
+
+#[test]
+fn map_seq_par_equivalence_collect_empty() {
+    let map_expected = MAP_EMPTY.clone();
+    let map_seq = MAP_VEC_EMPTY.clone().into_iter().collect::<HashMap<_, _>>();
+    let map_par = MAP_VEC_EMPTY
+        .clone()
+        .into_par_iter()
+        .collect::<HashMap<_, _>>();
+
+    assert_eq!(map_seq, map_par);
+    assert_eq!(map_seq, map_expected);
+    assert_eq!(map_par, map_expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_collect() {
+    let map_expected = MAP.clone();
+    let map_seq = MAP_VEC.clone().into_iter().collect::<HashMap<_, _>>();
+    let map_par = MAP_VEC.clone().into_par_iter().collect::<HashMap<_, _>>();
+
+    assert_eq!(map_seq, map_par);
+    assert_eq!(map_seq, map_expected);
+    assert_eq!(map_par, map_expected);
+}
+
+lazy_static! {
+    static ref MAP_EXISTING_EMPTY: HashMap<char, u32> = HashMap::new();
+    static ref MAP_EXISTING: HashMap<char, u32> = {
+        let mut m = HashMap::new();
+        m.insert('b', 20);
+        m.insert('a', 10);
+        m
+    };
+    static ref MAP_EXTENSION_EMPTY: Vec<(char, u32)> = vec![];
+    static ref MAP_EXTENSION: Vec<(char, u32)> = vec![('c', 30), ('e', 50), ('f', 60), ('d', 40),];
+}
+
+#[test]
+fn map_seq_par_equivalence_existing_empty_extend_empty() {
+    let expected = HashMap::new();
+    let mut map_seq = MAP_EXISTING_EMPTY.clone();
+    let mut map_par = MAP_EXISTING_EMPTY.clone();
+
+    map_seq.extend(MAP_EXTENSION_EMPTY.iter().copied());
+    map_par.par_extend(MAP_EXTENSION_EMPTY.par_iter().copied());
+
+    assert_eq3!(map_seq, map_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_existing_empty_extend() {
+    let expected = MAP_EXTENSION.iter().copied().collect::<HashMap<_, _>>();
+    let mut map_seq = MAP_EXISTING_EMPTY.clone();
+    let mut map_par = MAP_EXISTING_EMPTY.clone();
+
+    map_seq.extend(MAP_EXTENSION.iter().copied());
+    map_par.par_extend(MAP_EXTENSION.par_iter().copied());
+
+    assert_eq3!(map_seq, map_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_existing_extend_empty() {
+    let expected = MAP_EXISTING.clone();
+    let mut map_seq = MAP_EXISTING.clone();
+    let mut map_par = MAP_EXISTING.clone();
+
+    map_seq.extend(MAP_EXTENSION_EMPTY.iter().copied());
+    map_par.par_extend(MAP_EXTENSION_EMPTY.par_iter().copied());
+
+    assert_eq3!(map_seq, map_par, expected);
+}
+
+#[test]
+fn map_seq_par_equivalence_existing_extend() {
+    let expected = MAP.clone();
+    let mut map_seq = MAP_EXISTING.clone();
+    let mut map_par = MAP_EXISTING.clone();
+
+    map_seq.extend(MAP_EXTENSION.iter().copied());
+    map_par.par_extend(MAP_EXTENSION.par_iter().copied());
+
+    assert_eq3!(map_seq, map_par, expected);
+}
+
+lazy_static! {
+    static ref SET_EMPTY: HashSet<char> = HashSet::new();
+    static ref SET: HashSet<char> = {
+        let mut s = HashSet::new();
+        s.insert('b');
+        s.insert('a');
+        s.insert('c');
+        s.insert('e');
+        s.insert('f');
+        s.insert('d');
+        s
+    };
+}
+
+#[test]
+fn set_seq_par_equivalence_iter_empty() {
+    let vec_seq = SET_EMPTY.iter().collect::<Vec<_>>();
+    let vec_par = SET_EMPTY.par_iter().collect::<Vec<_>>();
+
+    let expected: [&char; 0] = [];
+
+    assert_eq3!(vec_seq, vec_par, expected);
+}
+
+#[test]
+fn set_seq_par_equivalence_iter() {
+    let mut vec_seq = SET.iter().collect::<Vec<_>>();
+    let mut vec_par = SET.par_iter().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = [&'a', &'b', &'c', &'d', &'e', &'f'];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+#[test]
+fn set_seq_par_equivalence_into_iter_empty() {
+    let vec_seq = SET_EMPTY.clone().into_iter().collect::<Vec<_>>();
+    let vec_par = SET_EMPTY.clone().into_par_iter().collect::<Vec<_>>();
+
+    assert_eq3!(vec_seq, vec_par, []);
+}
+
+#[test]
+fn set_seq_par_equivalence_into_iter() {
+    let mut vec_seq = SET.clone().into_iter().collect::<Vec<_>>();
+    let mut vec_par = SET.clone().into_par_iter().collect::<Vec<_>>();
+
+    assert_eq!(vec_seq, vec_par);
+
+    // Do not depend on the exact order of values
+    let expected_sorted = ['a', 'b', 'c', 'd', 'e', 'f'];
+
+    vec_seq.sort_unstable();
+    vec_par.sort_unstable();
+
+    assert_eq3!(vec_seq, vec_par, expected_sorted);
+}
+
+lazy_static! {
+    static ref SET_VEC_EMPTY: Vec<char> = vec![];
+    static ref SET_VEC: Vec<char> = vec!['b', 'a', 'c', 'e', 'f', 'd',];
+}
+
+#[test]
+fn set_seq_par_equivalence_collect_empty() {
+    let set_expected = SET_EMPTY.clone();
+    let set_seq = SET_VEC_EMPTY.clone().into_iter().collect::<HashSet<_>>();
+    let set_par = SET_VEC_EMPTY
+        .clone()
+        .into_par_iter()
+        .collect::<HashSet<_>>();
+
+    assert_eq!(set_seq, set_par);
+    assert_eq!(set_seq, set_expected);
+    assert_eq!(set_par, set_expected);
+}
+
+#[test]
+fn set_seq_par_equivalence_collect() {
+    let set_expected = SET.clone();
+    let set_seq = SET_VEC.clone().into_iter().collect::<HashSet<_>>();
+    let set_par = SET_VEC.clone().into_par_iter().collect::<HashSet<_>>();
+
+    assert_eq!(set_seq, set_par);
+    assert_eq!(set_seq, set_expected);
+    assert_eq!(set_par, set_expected);
+}
+
+lazy_static! {
+    static ref SET_EXISTING_EMPTY: HashSet<char> = HashSet::new();
+    static ref SET_EXISTING: HashSet<char> = {
+        let mut s = HashSet::new();
+        s.insert('b');
+        s.insert('a');
+        s
+    };
+    static ref SET_EXTENSION_EMPTY: Vec<char> = vec![];
+    static ref SET_EXTENSION: Vec<char> = vec!['c', 'e', 'f', 'd',];
+}
+
+#[test]
+fn set_seq_par_equivalence_existing_empty_extend_empty() {
+    let expected = HashSet::new();
+    let mut set_seq = SET_EXISTING_EMPTY.clone();
+    let mut set_par = SET_EXISTING_EMPTY.clone();
+
+    set_seq.extend(SET_EXTENSION_EMPTY.iter().copied());
+    set_par.par_extend(SET_EXTENSION_EMPTY.par_iter().copied());
+
+    assert_eq3!(set_seq, set_par, expected);
+}
+
+#[test]
+fn set_seq_par_equivalence_existing_empty_extend() {
+    let expected = SET_EXTENSION.iter().copied().collect::<HashSet<_>>();
+    let mut set_seq = SET_EXISTING_EMPTY.clone();
+    let mut set_par = SET_EXISTING_EMPTY.clone();
+
+    set_seq.extend(SET_EXTENSION.iter().copied());
+    set_par.par_extend(SET_EXTENSION.par_iter().copied());
+
+    assert_eq3!(set_seq, set_par, expected);
+}
+
+#[test]
+fn set_seq_par_equivalence_existing_extend_empty() {
+    let expected = SET_EXISTING.clone();
+    let mut set_seq = SET_EXISTING.clone();
+    let mut set_par = SET_EXISTING.clone();
+
+    set_seq.extend(SET_EXTENSION_EMPTY.iter().copied());
+    set_par.par_extend(SET_EXTENSION_EMPTY.par_iter().copied());
+
+    assert_eq3!(set_seq, set_par, expected);
+}
+
+#[test]
+fn set_seq_par_equivalence_existing_extend() {
+    let expected = SET.clone();
+    let mut set_seq = SET_EXISTING.clone();
+    let mut set_par = SET_EXISTING.clone();
+
+    set_seq.extend(SET_EXTENSION.iter().copied());
+    set_par.par_extend(SET_EXTENSION.par_iter().copied());
+
+    assert_eq3!(set_seq, set_par, expected);
+}
+
+lazy_static! {
+    static ref SET_A: HashSet<char> = ['a', 'b', 'c', 'd'].iter().copied().collect();
+    static ref SET_B: HashSet<char> = ['a', 'b', 'e', 'f'].iter().copied().collect();
+    static ref SET_DIFF_AB: HashSet<char> = ['c', 'd'].iter().copied().collect();
+    static ref SET_DIFF_BA: HashSet<char> = ['e', 'f'].iter().copied().collect();
+    static ref SET_SYMM_DIFF_AB: HashSet<char> = ['c', 'd', 'e', 'f'].iter().copied().collect();
+    static ref SET_INTERSECTION_AB: HashSet<char> = ['a', 'b'].iter().copied().collect();
+    static ref SET_UNION_AB: HashSet<char> =
+        ['a', 'b', 'c', 'd', 'e', 'f'].iter().copied().collect();
+}
+
+#[test]
+fn set_seq_par_equivalence_difference() {
+    let diff_ab_seq = SET_A.difference(&*SET_B).copied().collect::<HashSet<_>>();
+    let diff_ab_par = SET_A
+        .par_difference(&*SET_B)
+        .copied()
+        .collect::<HashSet<_>>();
+
+    assert_eq3!(diff_ab_seq, diff_ab_par, *SET_DIFF_AB);
+
+    let diff_ba_seq = SET_B.difference(&*SET_A).copied().collect::<HashSet<_>>();
+    let diff_ba_par = SET_B
+        .par_difference(&*SET_A)
+        .copied()
+        .collect::<HashSet<_>>();
+
+    assert_eq3!(diff_ba_seq, diff_ba_par, *SET_DIFF_BA);
+}
+
+#[test]
+fn set_seq_par_equivalence_symmetric_difference() {
+    let symm_diff_ab_seq = SET_A
+        .symmetric_difference(&*SET_B)
+        .copied()
+        .collect::<HashSet<_>>();
+    let symm_diff_ab_par = SET_A
+        .par_symmetric_difference(&*SET_B)
+        .copied()
+        .collect::<HashSet<_>>();
+
+    assert_eq3!(symm_diff_ab_seq, symm_diff_ab_par, *SET_SYMM_DIFF_AB);
+}
+
+#[test]
+fn set_seq_par_equivalence_intersection() {
+    let intersection_ab_seq = SET_A.intersection(&*SET_B).copied().collect::<HashSet<_>>();
+    let intersection_ab_par = SET_A
+        .par_intersection(&*SET_B)
+        .copied()
+        .collect::<HashSet<_>>();
+
+    assert_eq3!(
+        intersection_ab_seq,
+        intersection_ab_par,
+        *SET_INTERSECTION_AB
+    );
+}
+
+#[test]
+fn set_seq_par_equivalence_union() {
+    let union_ab_seq = SET_A.union(&*SET_B).copied().collect::<HashSet<_>>();
+    let union_ab_par = SET_A.par_union(&*SET_B).copied().collect::<HashSet<_>>();
+
+    assert_eq3!(union_ab_seq, union_ab_par, *SET_UNION_AB);
+}
diff --git a/third_party/rust/hashbrown/tests/serde.rs b/third_party/rust/hashbrown/tests/serde.rs
new file mode 100644
index 0000000000..a642348b3b
--- /dev/null
+++ b/third_party/rust/hashbrown/tests/serde.rs
@@ -0,0 +1,65 @@
+#![cfg(feature = "serde")]
+
+use core::hash::BuildHasherDefault;
+use fnv::FnvHasher;
+use hashbrown::{HashMap, HashSet};
+use serde_test::{assert_tokens, Token};
+
+// We use FnvHash for this test because we rely on the ordering
+type FnvHashMap<K, V> = HashMap<K, V, BuildHasherDefault<FnvHasher>>;
+type FnvHashSet<T> = HashSet<T, BuildHasherDefault<FnvHasher>>;
+
+#[test]
+fn map_serde_tokens_empty() {
+    let map = FnvHashMap::<char, u32>::default();
+
+    assert_tokens(&map, &[Token::Map { len: Some(0) }, Token::MapEnd]);
+}
+
+#[test]
+fn map_serde_tokens() {
+    let mut map = FnvHashMap::default();
+    map.insert('b', 20);
+    map.insert('a', 10);
+    map.insert('c', 30);
+
+    assert_tokens(
+        &map,
+        &[
+            Token::Map { len: Some(3) },
+            Token::Char('a'),
+            Token::I32(10),
+            Token::Char('c'),
+            Token::I32(30),
+            Token::Char('b'),
+            Token::I32(20),
+            Token::MapEnd,
+        ],
+    );
+}
+
+#[test]
+fn set_serde_tokens_empty() {
+    let set = FnvHashSet::<u32>::default();
+
+    assert_tokens(&set, &[Token::Seq { len: Some(0) }, Token::SeqEnd]);
+}
+
+#[test]
+fn set_serde_tokens() {
+    let mut set = FnvHashSet::default();
+    set.insert(20);
+    set.insert(10);
+    set.insert(30);
+
+    assert_tokens(
+        &set,
+        &[
+            Token::Seq { len: Some(3) },
+            Token::I32(30),
+            Token::I32(20),
+            Token::I32(10),
+            Token::SeqEnd,
+        ],
+    );
+}
diff --git a/third_party/rust/hashbrown/tests/set.rs b/third_party/rust/hashbrown/tests/set.rs
new file mode 100644
index 0000000000..5ae1ec98ec
--- /dev/null
+++ b/third_party/rust/hashbrown/tests/set.rs
@@ -0,0 +1,34 @@
+#![cfg(not(miri))] // FIXME: takes too long
+
+use hashbrown::HashSet;
+use rand::{distributions::Alphanumeric, rngs::SmallRng, Rng, SeedableRng};
+use std::iter;
+
+#[test]
+fn test_hashset_insert_remove() {
+    let mut m: HashSet<Vec<char>> = HashSet::new();
+    let seed = u64::from_le_bytes(*b"testseed");
+
+    let rng = &mut SmallRng::seed_from_u64(seed);
+    let tx: Vec<Vec<char>> = iter::repeat_with(|| {
+        rng.sample_iter(&Alphanumeric)
+            .take(32)
+            .map(char::from)
+            .collect()
+    })
+    .take(4096)
+    .collect();
+
+    // more readable with explicit `true` / `false`
+    #[allow(clippy::bool_assert_comparison)]
+    for _ in 0..32 {
+        for x in &tx {
+            assert_eq!(m.contains(x), false);
+            assert_eq!(m.insert(x.clone()), true);
+        }
+        for (i, x) in tx.iter().enumerate() {
+            println!("removing {} {:?}", i, x);
+            assert_eq!(m.remove(x), true);
+        }
+    }
+}