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-rw-r--r--third_party/rust/indexmap/src/map/tests.rs727
1 files changed, 727 insertions, 0 deletions
diff --git a/third_party/rust/indexmap/src/map/tests.rs b/third_party/rust/indexmap/src/map/tests.rs
new file mode 100644
index 0000000000..bba78ff54c
--- /dev/null
+++ b/third_party/rust/indexmap/src/map/tests.rs
@@ -0,0 +1,727 @@
+use super::*;
+use std::string::String;
+
+#[test]
+fn it_works() {
+ let mut map = IndexMap::new();
+ assert_eq!(map.is_empty(), true);
+ map.insert(1, ());
+ map.insert(1, ());
+ assert_eq!(map.len(), 1);
+ assert!(map.get(&1).is_some());
+ assert_eq!(map.is_empty(), false);
+}
+
+#[test]
+fn new() {
+ let map = IndexMap::<String, String>::new();
+ println!("{:?}", map);
+ assert_eq!(map.capacity(), 0);
+ assert_eq!(map.len(), 0);
+ assert_eq!(map.is_empty(), true);
+}
+
+#[test]
+fn insert() {
+ let insert = [0, 4, 2, 12, 8, 7, 11, 5];
+ let not_present = [1, 3, 6, 9, 10];
+ let mut map = IndexMap::with_capacity(insert.len());
+
+ for (i, &elt) in insert.iter().enumerate() {
+ assert_eq!(map.len(), i);
+ map.insert(elt, elt);
+ assert_eq!(map.len(), i + 1);
+ assert_eq!(map.get(&elt), Some(&elt));
+ assert_eq!(map[&elt], elt);
+ }
+ println!("{:?}", map);
+
+ for &elt in &not_present {
+ assert!(map.get(&elt).is_none());
+ }
+}
+
+#[test]
+fn insert_full() {
+ let insert = vec![9, 2, 7, 1, 4, 6, 13];
+ let present = vec![1, 6, 2];
+ let mut map = IndexMap::with_capacity(insert.len());
+
+ for (i, &elt) in insert.iter().enumerate() {
+ assert_eq!(map.len(), i);
+ let (index, existing) = map.insert_full(elt, elt);
+ assert_eq!(existing, None);
+ assert_eq!(Some(index), map.get_full(&elt).map(|x| x.0));
+ assert_eq!(map.len(), i + 1);
+ }
+
+ let len = map.len();
+ for &elt in &present {
+ let (index, existing) = map.insert_full(elt, elt);
+ assert_eq!(existing, Some(elt));
+ assert_eq!(Some(index), map.get_full(&elt).map(|x| x.0));
+ assert_eq!(map.len(), len);
+ }
+}
+
+#[test]
+fn insert_2() {
+ let mut map = IndexMap::with_capacity(16);
+
+ let mut keys = vec![];
+ keys.extend(0..16);
+ keys.extend(if cfg!(miri) { 32..64 } else { 128..267 });
+
+ for &i in &keys {
+ let old_map = map.clone();
+ map.insert(i, ());
+ for key in old_map.keys() {
+ if map.get(key).is_none() {
+ println!("old_map: {:?}", old_map);
+ println!("map: {:?}", map);
+ panic!("did not find {} in map", key);
+ }
+ }
+ }
+
+ for &i in &keys {
+ assert!(map.get(&i).is_some(), "did not find {}", i);
+ }
+}
+
+#[test]
+fn insert_order() {
+ let insert = [0, 4, 2, 12, 8, 7, 11, 5, 3, 17, 19, 22, 23];
+ let mut map = IndexMap::new();
+
+ for &elt in &insert {
+ map.insert(elt, ());
+ }
+
+ assert_eq!(map.keys().count(), map.len());
+ assert_eq!(map.keys().count(), insert.len());
+ for (a, b) in insert.iter().zip(map.keys()) {
+ assert_eq!(a, b);
+ }
+ for (i, k) in (0..insert.len()).zip(map.keys()) {
+ assert_eq!(map.get_index(i).unwrap().0, k);
+ }
+}
+
+#[test]
+fn shift_insert() {
+ let insert = [0, 4, 2, 12, 8, 7, 11, 5, 3, 17, 19, 22, 23];
+ let mut map = IndexMap::new();
+
+ for &elt in &insert {
+ map.shift_insert(0, elt, ());
+ }
+
+ assert_eq!(map.keys().count(), map.len());
+ assert_eq!(map.keys().count(), insert.len());
+ for (a, b) in insert.iter().rev().zip(map.keys()) {
+ assert_eq!(a, b);
+ }
+ for (i, k) in (0..insert.len()).zip(map.keys()) {
+ assert_eq!(map.get_index(i).unwrap().0, k);
+ }
+
+ // "insert" that moves an existing entry
+ map.shift_insert(0, insert[0], ());
+ assert_eq!(map.keys().count(), insert.len());
+ assert_eq!(insert[0], map.keys()[0]);
+ for (a, b) in insert[1..].iter().rev().zip(map.keys().skip(1)) {
+ assert_eq!(a, b);
+ }
+}
+
+#[test]
+fn grow() {
+ let insert = [0, 4, 2, 12, 8, 7, 11];
+ let not_present = [1, 3, 6, 9, 10];
+ let mut map = IndexMap::with_capacity(insert.len());
+
+ for (i, &elt) in insert.iter().enumerate() {
+ assert_eq!(map.len(), i);
+ map.insert(elt, elt);
+ assert_eq!(map.len(), i + 1);
+ assert_eq!(map.get(&elt), Some(&elt));
+ assert_eq!(map[&elt], elt);
+ }
+
+ println!("{:?}", map);
+ for &elt in &insert {
+ map.insert(elt * 10, elt);
+ }
+ for &elt in &insert {
+ map.insert(elt * 100, elt);
+ }
+ for (i, &elt) in insert.iter().cycle().enumerate().take(100) {
+ map.insert(elt * 100 + i as i32, elt);
+ }
+ println!("{:?}", map);
+ for &elt in &not_present {
+ assert!(map.get(&elt).is_none());
+ }
+}
+
+#[test]
+fn reserve() {
+ let mut map = IndexMap::<usize, usize>::new();
+ assert_eq!(map.capacity(), 0);
+ map.reserve(100);
+ let capacity = map.capacity();
+ assert!(capacity >= 100);
+ for i in 0..capacity {
+ assert_eq!(map.len(), i);
+ map.insert(i, i * i);
+ assert_eq!(map.len(), i + 1);
+ assert_eq!(map.capacity(), capacity);
+ assert_eq!(map.get(&i), Some(&(i * i)));
+ }
+ map.insert(capacity, std::usize::MAX);
+ assert_eq!(map.len(), capacity + 1);
+ assert!(map.capacity() > capacity);
+ assert_eq!(map.get(&capacity), Some(&std::usize::MAX));
+}
+
+#[test]
+fn try_reserve() {
+ let mut map = IndexMap::<usize, usize>::new();
+ assert_eq!(map.capacity(), 0);
+ assert_eq!(map.try_reserve(100), Ok(()));
+ assert!(map.capacity() >= 100);
+ assert!(map.try_reserve(usize::MAX).is_err());
+}
+
+#[test]
+fn shrink_to_fit() {
+ let mut map = IndexMap::<usize, usize>::new();
+ assert_eq!(map.capacity(), 0);
+ for i in 0..100 {
+ assert_eq!(map.len(), i);
+ map.insert(i, i * i);
+ assert_eq!(map.len(), i + 1);
+ assert!(map.capacity() >= i + 1);
+ assert_eq!(map.get(&i), Some(&(i * i)));
+ map.shrink_to_fit();
+ assert_eq!(map.len(), i + 1);
+ assert_eq!(map.capacity(), i + 1);
+ assert_eq!(map.get(&i), Some(&(i * i)));
+ }
+}
+
+#[test]
+fn remove() {
+ let insert = [0, 4, 2, 12, 8, 7, 11, 5, 3, 17, 19, 22, 23];
+ let mut map = IndexMap::new();
+
+ for &elt in &insert {
+ map.insert(elt, elt);
+ }
+
+ assert_eq!(map.keys().count(), map.len());
+ assert_eq!(map.keys().count(), insert.len());
+ for (a, b) in insert.iter().zip(map.keys()) {
+ assert_eq!(a, b);
+ }
+
+ let remove_fail = [99, 77];
+ let remove = [4, 12, 8, 7];
+
+ for &key in &remove_fail {
+ assert!(map.swap_remove_full(&key).is_none());
+ }
+ println!("{:?}", map);
+ for &key in &remove {
+ //println!("{:?}", map);
+ let index = map.get_full(&key).unwrap().0;
+ assert_eq!(map.swap_remove_full(&key), Some((index, key, key)));
+ }
+ println!("{:?}", map);
+
+ for key in &insert {
+ assert_eq!(map.get(key).is_some(), !remove.contains(key));
+ }
+ assert_eq!(map.len(), insert.len() - remove.len());
+ assert_eq!(map.keys().count(), insert.len() - remove.len());
+}
+
+#[test]
+fn remove_to_empty() {
+ let mut map = indexmap! { 0 => 0, 4 => 4, 5 => 5 };
+ map.swap_remove(&5).unwrap();
+ map.swap_remove(&4).unwrap();
+ map.swap_remove(&0).unwrap();
+ assert!(map.is_empty());
+}
+
+#[test]
+fn swap_remove_index() {
+ let insert = [0, 4, 2, 12, 8, 7, 11, 5, 3, 17, 19, 22, 23];
+ let mut map = IndexMap::new();
+
+ for &elt in &insert {
+ map.insert(elt, elt * 2);
+ }
+
+ let mut vector = insert.to_vec();
+ let remove_sequence = &[3, 3, 10, 4, 5, 4, 3, 0, 1];
+
+ // check that the same swap remove sequence on vec and map
+ // have the same result.
+ for &rm in remove_sequence {
+ let out_vec = vector.swap_remove(rm);
+ let (out_map, _) = map.swap_remove_index(rm).unwrap();
+ assert_eq!(out_vec, out_map);
+ }
+ assert_eq!(vector.len(), map.len());
+ for (a, b) in vector.iter().zip(map.keys()) {
+ assert_eq!(a, b);
+ }
+}
+
+#[test]
+fn partial_eq_and_eq() {
+ let mut map_a = IndexMap::new();
+ map_a.insert(1, "1");
+ map_a.insert(2, "2");
+ let mut map_b = map_a.clone();
+ assert_eq!(map_a, map_b);
+ map_b.swap_remove(&1);
+ assert_ne!(map_a, map_b);
+
+ let map_c: IndexMap<_, String> = map_b.into_iter().map(|(k, v)| (k, v.into())).collect();
+ assert_ne!(map_a, map_c);
+ assert_ne!(map_c, map_a);
+}
+
+#[test]
+fn extend() {
+ let mut map = IndexMap::new();
+ map.extend(vec![(&1, &2), (&3, &4)]);
+ map.extend(vec![(5, 6)]);
+ assert_eq!(
+ map.into_iter().collect::<Vec<_>>(),
+ vec![(1, 2), (3, 4), (5, 6)]
+ );
+}
+
+#[test]
+fn entry() {
+ let mut map = IndexMap::new();
+
+ map.insert(1, "1");
+ map.insert(2, "2");
+ {
+ let e = map.entry(3);
+ assert_eq!(e.index(), 2);
+ let e = e.or_insert("3");
+ assert_eq!(e, &"3");
+ }
+
+ let e = map.entry(2);
+ assert_eq!(e.index(), 1);
+ assert_eq!(e.key(), &2);
+ match e {
+ Entry::Occupied(ref e) => assert_eq!(e.get(), &"2"),
+ Entry::Vacant(_) => panic!(),
+ }
+ assert_eq!(e.or_insert("4"), &"2");
+}
+
+#[test]
+fn entry_and_modify() {
+ let mut map = IndexMap::new();
+
+ map.insert(1, "1");
+ map.entry(1).and_modify(|x| *x = "2");
+ assert_eq!(Some(&"2"), map.get(&1));
+
+ map.entry(2).and_modify(|x| *x = "doesn't exist");
+ assert_eq!(None, map.get(&2));
+}
+
+#[test]
+fn entry_or_default() {
+ let mut map = IndexMap::new();
+
+ #[derive(Debug, PartialEq)]
+ enum TestEnum {
+ DefaultValue,
+ NonDefaultValue,
+ }
+
+ impl Default for TestEnum {
+ fn default() -> Self {
+ TestEnum::DefaultValue
+ }
+ }
+
+ map.insert(1, TestEnum::NonDefaultValue);
+ assert_eq!(&mut TestEnum::NonDefaultValue, map.entry(1).or_default());
+
+ assert_eq!(&mut TestEnum::DefaultValue, map.entry(2).or_default());
+}
+
+#[test]
+fn occupied_entry_key() {
+ // These keys match hash and equality, but their addresses are distinct.
+ let (k1, k2) = (&mut 1, &mut 1);
+ let k1_ptr = k1 as *const i32;
+ let k2_ptr = k2 as *const i32;
+ assert_ne!(k1_ptr, k2_ptr);
+
+ let mut map = IndexMap::new();
+ map.insert(k1, "value");
+ match map.entry(k2) {
+ Entry::Occupied(ref e) => {
+ // `OccupiedEntry::key` should reference the key in the map,
+ // not the key that was used to find the entry.
+ let ptr = *e.key() as *const i32;
+ assert_eq!(ptr, k1_ptr);
+ assert_ne!(ptr, k2_ptr);
+ }
+ Entry::Vacant(_) => panic!(),
+ }
+}
+
+#[test]
+fn get_index_entry() {
+ let mut map = IndexMap::new();
+
+ assert!(map.get_index_entry(0).is_none());
+
+ map.insert(0, "0");
+ map.insert(1, "1");
+ map.insert(2, "2");
+ map.insert(3, "3");
+
+ assert!(map.get_index_entry(4).is_none());
+
+ {
+ let e = map.get_index_entry(1).unwrap();
+ assert_eq!(*e.key(), 1);
+ assert_eq!(*e.get(), "1");
+ assert_eq!(e.swap_remove(), "1");
+ }
+
+ {
+ let mut e = map.get_index_entry(1).unwrap();
+ assert_eq!(*e.key(), 3);
+ assert_eq!(*e.get(), "3");
+ assert_eq!(e.insert("4"), "3");
+ }
+
+ assert_eq!(*map.get(&3).unwrap(), "4");
+}
+
+#[test]
+fn keys() {
+ let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')];
+ let map: IndexMap<_, _> = vec.into_iter().collect();
+ let keys: Vec<_> = map.keys().copied().collect();
+ assert_eq!(keys.len(), 3);
+ assert!(keys.contains(&1));
+ assert!(keys.contains(&2));
+ assert!(keys.contains(&3));
+}
+
+#[test]
+fn into_keys() {
+ let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')];
+ let map: IndexMap<_, _> = vec.into_iter().collect();
+ let keys: Vec<i32> = map.into_keys().collect();
+ assert_eq!(keys.len(), 3);
+ assert!(keys.contains(&1));
+ assert!(keys.contains(&2));
+ assert!(keys.contains(&3));
+}
+
+#[test]
+fn values() {
+ let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')];
+ let map: IndexMap<_, _> = vec.into_iter().collect();
+ let values: Vec<_> = map.values().copied().collect();
+ assert_eq!(values.len(), 3);
+ assert!(values.contains(&'a'));
+ assert!(values.contains(&'b'));
+ assert!(values.contains(&'c'));
+}
+
+#[test]
+fn values_mut() {
+ let vec = vec![(1, 1), (2, 2), (3, 3)];
+ let mut map: IndexMap<_, _> = vec.into_iter().collect();
+ for value in map.values_mut() {
+ *value *= 2
+ }
+ let values: Vec<_> = map.values().copied().collect();
+ assert_eq!(values.len(), 3);
+ assert!(values.contains(&2));
+ assert!(values.contains(&4));
+ assert!(values.contains(&6));
+}
+
+#[test]
+fn into_values() {
+ let vec = vec![(1, 'a'), (2, 'b'), (3, 'c')];
+ let map: IndexMap<_, _> = vec.into_iter().collect();
+ let values: Vec<char> = map.into_values().collect();
+ assert_eq!(values.len(), 3);
+ assert!(values.contains(&'a'));
+ assert!(values.contains(&'b'));
+ assert!(values.contains(&'c'));
+}
+
+#[test]
+#[cfg(feature = "std")]
+fn from_array() {
+ let map = IndexMap::from([(1, 2), (3, 4)]);
+ let mut expected = IndexMap::new();
+ expected.insert(1, 2);
+ expected.insert(3, 4);
+
+ assert_eq!(map, expected)
+}
+
+#[test]
+fn iter_default() {
+ struct K;
+ struct V;
+ fn assert_default<T>()
+ where
+ T: Default + Iterator,
+ {
+ assert!(T::default().next().is_none());
+ }
+ assert_default::<Iter<'static, K, V>>();
+ assert_default::<IterMut<'static, K, V>>();
+ assert_default::<IntoIter<K, V>>();
+ assert_default::<Keys<'static, K, V>>();
+ assert_default::<IntoKeys<K, V>>();
+ assert_default::<Values<'static, K, V>>();
+ assert_default::<ValuesMut<'static, K, V>>();
+ assert_default::<IntoValues<K, V>>();
+}
+
+#[test]
+fn test_binary_search_by() {
+ // adapted from std's test for binary_search
+ let b: IndexMap<_, i32> = []
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&5)), Err(0));
+
+ let b: IndexMap<_, i32> = [4]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&3)), Err(0));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&4)), Ok(0));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&5)), Err(1));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&5)), Err(3));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&6)), Ok(3));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&7)), Err(4));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&8)), Ok(4));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&9)), Err(6));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 7, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&6)), Ok(3));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&5)), Err(3));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&8)), Ok(5));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&7)), Err(5));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&0)), Err(0));
+
+ let b: IndexMap<_, i32> = [1, 3, 3, 3, 7]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&0)), Err(0));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&1)), Ok(0));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&2)), Err(1));
+ assert!(match b.binary_search_by(|_, x| x.cmp(&3)) {
+ Ok(1..=3) => true,
+ _ => false,
+ });
+ assert!(match b.binary_search_by(|_, x| x.cmp(&3)) {
+ Ok(1..=3) => true,
+ _ => false,
+ });
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&4)), Err(4));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&5)), Err(4));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&6)), Err(4));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&7)), Ok(4));
+ assert_eq!(b.binary_search_by(|_, x| x.cmp(&8)), Err(5));
+}
+
+#[test]
+fn test_binary_search_by_key() {
+ // adapted from std's test for binary_search
+ let b: IndexMap<_, i32> = []
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&5, |_, &x| x), Err(0));
+
+ let b: IndexMap<_, i32> = [4]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&3, |_, &x| x), Err(0));
+ assert_eq!(b.binary_search_by_key(&4, |_, &x| x), Ok(0));
+ assert_eq!(b.binary_search_by_key(&5, |_, &x| x), Err(1));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&5, |_, &x| x), Err(3));
+ assert_eq!(b.binary_search_by_key(&6, |_, &x| x), Ok(3));
+ assert_eq!(b.binary_search_by_key(&7, |_, &x| x), Err(4));
+ assert_eq!(b.binary_search_by_key(&8, |_, &x| x), Ok(4));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&9, |_, &x| x), Err(6));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 7, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&6, |_, &x| x), Ok(3));
+ assert_eq!(b.binary_search_by_key(&5, |_, &x| x), Err(3));
+ assert_eq!(b.binary_search_by_key(&8, |_, &x| x), Ok(5));
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&7, |_, &x| x), Err(5));
+ assert_eq!(b.binary_search_by_key(&0, |_, &x| x), Err(0));
+
+ let b: IndexMap<_, i32> = [1, 3, 3, 3, 7]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.binary_search_by_key(&0, |_, &x| x), Err(0));
+ assert_eq!(b.binary_search_by_key(&1, |_, &x| x), Ok(0));
+ assert_eq!(b.binary_search_by_key(&2, |_, &x| x), Err(1));
+ assert!(match b.binary_search_by_key(&3, |_, &x| x) {
+ Ok(1..=3) => true,
+ _ => false,
+ });
+ assert!(match b.binary_search_by_key(&3, |_, &x| x) {
+ Ok(1..=3) => true,
+ _ => false,
+ });
+ assert_eq!(b.binary_search_by_key(&4, |_, &x| x), Err(4));
+ assert_eq!(b.binary_search_by_key(&5, |_, &x| x), Err(4));
+ assert_eq!(b.binary_search_by_key(&6, |_, &x| x), Err(4));
+ assert_eq!(b.binary_search_by_key(&7, |_, &x| x), Ok(4));
+ assert_eq!(b.binary_search_by_key(&8, |_, &x| x), Err(5));
+}
+
+#[test]
+fn test_partition_point() {
+ // adapted from std's test for partition_point
+ let b: IndexMap<_, i32> = []
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 5), 0);
+
+ let b: IndexMap<_, i32> = [4]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 3), 0);
+ assert_eq!(b.partition_point(|_, &x| x < 4), 0);
+ assert_eq!(b.partition_point(|_, &x| x < 5), 1);
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 5), 3);
+ assert_eq!(b.partition_point(|_, &x| x < 6), 3);
+ assert_eq!(b.partition_point(|_, &x| x < 7), 4);
+ assert_eq!(b.partition_point(|_, &x| x < 8), 4);
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 9), 6);
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 6, 7, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 6), 3);
+ assert_eq!(b.partition_point(|_, &x| x < 5), 3);
+ assert_eq!(b.partition_point(|_, &x| x < 8), 5);
+
+ let b: IndexMap<_, i32> = [1, 2, 4, 5, 6, 8, 9]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 7), 5);
+ assert_eq!(b.partition_point(|_, &x| x < 0), 0);
+
+ let b: IndexMap<_, i32> = [1, 3, 3, 3, 7]
+ .into_iter()
+ .enumerate()
+ .map(|(i, x)| (i + 100, x))
+ .collect();
+ assert_eq!(b.partition_point(|_, &x| x < 0), 0);
+ assert_eq!(b.partition_point(|_, &x| x < 1), 0);
+ assert_eq!(b.partition_point(|_, &x| x < 2), 1);
+ assert_eq!(b.partition_point(|_, &x| x < 3), 1);
+ assert_eq!(b.partition_point(|_, &x| x < 4), 4);
+ assert_eq!(b.partition_point(|_, &x| x < 5), 4);
+ assert_eq!(b.partition_point(|_, &x| x < 6), 4);
+ assert_eq!(b.partition_point(|_, &x| x < 7), 4);
+ assert_eq!(b.partition_point(|_, &x| x < 8), 5);
+}
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