diff options
Diffstat (limited to 'absl/container/btree_test.cc')
| -rw-r--r-- | absl/container/btree_test.cc | 383 |
1 files changed, 331 insertions, 52 deletions
diff --git a/absl/container/btree_test.cc b/absl/container/btree_test.cc index 1bfa0c20..74337df2 100644 --- a/absl/container/btree_test.cc +++ b/absl/container/btree_test.cc @@ -55,6 +55,7 @@ using ::testing::ElementsAreArray; using ::testing::IsEmpty; using ::testing::IsNull; using ::testing::Pair; +using ::testing::SizeIs; template <typename T, typename U> void CheckPairEquals(const T &x, const U &y) { @@ -1182,6 +1183,103 @@ TEST(Btree, RangeCtorSanity) { EXPECT_EQ(1, tmap.size()); } +} // namespace + +class BtreeNodePeer { + public: + // Yields the size of a leaf node with a specific number of values. + template <typename ValueType> + constexpr static size_t GetTargetNodeSize(size_t target_values_per_node) { + return btree_node< + set_params<ValueType, std::less<ValueType>, std::allocator<ValueType>, + /*TargetNodeSize=*/256, // This parameter isn't used here. + /*Multi=*/false>>::SizeWithNSlots(target_values_per_node); + } + + // Yields the number of slots in a (non-root) leaf node for this btree. + template <typename Btree> + constexpr static size_t GetNumSlotsPerNode() { + return btree_node<typename Btree::params_type>::kNodeSlots; + } + + template <typename Btree> + constexpr static size_t GetMaxFieldType() { + return std::numeric_limits< + typename btree_node<typename Btree::params_type>::field_type>::max(); + } + + template <typename Btree> + constexpr static bool UsesLinearNodeSearch() { + return btree_node<typename Btree::params_type>::use_linear_search::value; + } +}; + +namespace { + +class BtreeMapTest : public ::testing::Test { + public: + struct Key {}; + struct Cmp { + template <typename T> + bool operator()(T, T) const { + return false; + } + }; + + struct KeyLin { + using absl_btree_prefer_linear_node_search = std::true_type; + }; + struct CmpLin : Cmp { + using absl_btree_prefer_linear_node_search = std::true_type; + }; + + struct KeyBin { + using absl_btree_prefer_linear_node_search = std::false_type; + }; + struct CmpBin : Cmp { + using absl_btree_prefer_linear_node_search = std::false_type; + }; + + template <typename K, typename C> + static bool IsLinear() { + return BtreeNodePeer::UsesLinearNodeSearch<absl::btree_map<K, int, C>>(); + } +}; + +TEST_F(BtreeMapTest, TestLinearSearchPreferredForKeyLinearViaAlias) { + // Test requesting linear search by directly exporting an alias. + EXPECT_FALSE((IsLinear<Key, Cmp>())); + EXPECT_TRUE((IsLinear<KeyLin, Cmp>())); + EXPECT_TRUE((IsLinear<Key, CmpLin>())); + EXPECT_TRUE((IsLinear<KeyLin, CmpLin>())); +} + +TEST_F(BtreeMapTest, LinearChoiceTree) { + // Cmp has precedence, and is forcing binary + EXPECT_FALSE((IsLinear<Key, CmpBin>())); + EXPECT_FALSE((IsLinear<KeyLin, CmpBin>())); + EXPECT_FALSE((IsLinear<KeyBin, CmpBin>())); + EXPECT_FALSE((IsLinear<int, CmpBin>())); + EXPECT_FALSE((IsLinear<std::string, CmpBin>())); + // Cmp has precedence, and is forcing linear + EXPECT_TRUE((IsLinear<Key, CmpLin>())); + EXPECT_TRUE((IsLinear<KeyLin, CmpLin>())); + EXPECT_TRUE((IsLinear<KeyBin, CmpLin>())); + EXPECT_TRUE((IsLinear<int, CmpLin>())); + EXPECT_TRUE((IsLinear<std::string, CmpLin>())); + // Cmp has no preference, Key determines linear vs binary. + EXPECT_FALSE((IsLinear<Key, Cmp>())); + EXPECT_TRUE((IsLinear<KeyLin, Cmp>())); + EXPECT_FALSE((IsLinear<KeyBin, Cmp>())); + // arithmetic key w/ std::less or std::greater: linear + EXPECT_TRUE((IsLinear<int, std::less<int>>())); + EXPECT_TRUE((IsLinear<double, std::greater<double>>())); + // arithmetic key w/ custom compare: binary + EXPECT_FALSE((IsLinear<int, Cmp>())); + // non-arithmetic key: binary + EXPECT_FALSE((IsLinear<std::string, std::less<std::string>>())); +} + TEST(Btree, BtreeMapCanHoldMoveOnlyTypes) { absl::btree_map<std::string, std::unique_ptr<std::string>> m; @@ -1327,34 +1425,6 @@ TEST(Btree, RValueInsert) { EXPECT_EQ(tracker.swaps(), 0); } -} // namespace - -class BtreeNodePeer { - public: - // Yields the size of a leaf node with a specific number of values. - template <typename ValueType> - constexpr static size_t GetTargetNodeSize(size_t target_values_per_node) { - return btree_node< - set_params<ValueType, std::less<ValueType>, std::allocator<ValueType>, - /*TargetNodeSize=*/256, // This parameter isn't used here. - /*Multi=*/false>>::SizeWithNValues(target_values_per_node); - } - - // Yields the number of values in a (non-root) leaf node for this set. - template <typename Set> - constexpr static size_t GetNumValuesPerNode() { - return btree_node<typename Set::params_type>::kNodeValues; - } - - template <typename Set> - constexpr static size_t GetMaxFieldType() { - return std::numeric_limits< - typename btree_node<typename Set::params_type>::field_type>::max(); - } -}; - -namespace { - // A btree set with a specific number of values per node. template <typename Key, int TargetValuesPerNode, typename Cmp = std::less<Key>> class SizedBtreeSet @@ -1388,7 +1458,7 @@ void ExpectOperationCounts(const int expected_moves, TEST(Btree, MovesComparisonsCopiesSwapsTracking) { InstanceTracker tracker; // Note: this is minimum number of values per node. - SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/3> set3; + SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/4> set4; // Note: this is the default number of values per node for a set of int32s // (with 64-bit pointers). SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/61> set61; @@ -1399,28 +1469,28 @@ TEST(Btree, MovesComparisonsCopiesSwapsTracking) { std::vector<int> values = GenerateValuesWithSeed<int>(10000, 1 << 22, /*seed=*/23); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set3)>(), 3); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>(), 61); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set100)>(), 100); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set4)>(), 4); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>(), 61); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set100)>(), 100); if (sizeof(void *) == 8) { - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<absl::btree_set<int32_t>>(), - BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>()); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(), + BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>()); } // Test key insertion/deletion in random order. - ExpectOperationCounts(45281, 132551, values, &tracker, &set3); + ExpectOperationCounts(56540, 134212, values, &tracker, &set4); ExpectOperationCounts(386718, 129807, values, &tracker, &set61); ExpectOperationCounts(586761, 130310, values, &tracker, &set100); // Test key insertion/deletion in sorted order. std::sort(values.begin(), values.end()); - ExpectOperationCounts(26638, 92134, values, &tracker, &set3); + ExpectOperationCounts(24972, 85563, values, &tracker, &set4); ExpectOperationCounts(20208, 87757, values, &tracker, &set61); ExpectOperationCounts(20124, 96583, values, &tracker, &set100); // Test key insertion/deletion in reverse sorted order. std::reverse(values.begin(), values.end()); - ExpectOperationCounts(49951, 119325, values, &tracker, &set3); + ExpectOperationCounts(54949, 127531, values, &tracker, &set4); ExpectOperationCounts(338813, 118266, values, &tracker, &set61); ExpectOperationCounts(534529, 125279, values, &tracker, &set100); } @@ -1437,9 +1507,9 @@ struct MovableOnlyInstanceThreeWayCompare { TEST(Btree, MovesComparisonsCopiesSwapsTrackingThreeWayCompare) { InstanceTracker tracker; // Note: this is minimum number of values per node. - SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/3, + SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/4, MovableOnlyInstanceThreeWayCompare> - set3; + set4; // Note: this is the default number of values per node for a set of int32s // (with 64-bit pointers). SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/61, @@ -1454,28 +1524,28 @@ TEST(Btree, MovesComparisonsCopiesSwapsTrackingThreeWayCompare) { std::vector<int> values = GenerateValuesWithSeed<int>(10000, 1 << 22, /*seed=*/23); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set3)>(), 3); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>(), 61); - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set100)>(), 100); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set4)>(), 4); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>(), 61); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<decltype(set100)>(), 100); if (sizeof(void *) == 8) { - EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<absl::btree_set<int32_t>>(), - BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>()); + EXPECT_EQ(BtreeNodePeer::GetNumSlotsPerNode<absl::btree_set<int32_t>>(), + BtreeNodePeer::GetNumSlotsPerNode<decltype(set61)>()); } // Test key insertion/deletion in random order. - ExpectOperationCounts(45281, 122560, values, &tracker, &set3); + ExpectOperationCounts(56540, 124221, values, &tracker, &set4); ExpectOperationCounts(386718, 119816, values, &tracker, &set61); ExpectOperationCounts(586761, 120319, values, &tracker, &set100); // Test key insertion/deletion in sorted order. std::sort(values.begin(), values.end()); - ExpectOperationCounts(26638, 92134, values, &tracker, &set3); + ExpectOperationCounts(24972, 85563, values, &tracker, &set4); ExpectOperationCounts(20208, 87757, values, &tracker, &set61); ExpectOperationCounts(20124, 96583, values, &tracker, &set100); // Test key insertion/deletion in reverse sorted order. std::reverse(values.begin(), values.end()); - ExpectOperationCounts(49951, 109326, values, &tracker, &set3); + ExpectOperationCounts(54949, 117532, values, &tracker, &set4); ExpectOperationCounts(338813, 108267, values, &tracker, &set61); ExpectOperationCounts(534529, 115280, values, &tracker, &set100); } @@ -1968,6 +2038,30 @@ TEST(Btree, ExtractAndInsertNodeHandleMultiMap) { EXPECT_EQ(res, ++other.begin()); } +TEST(Btree, ExtractMultiMapEquivalentKeys) { + // Note: using string keys means a three-way comparator. + absl::btree_multimap<std::string, int> map; + for (int i = 0; i < 100; ++i) { + for (int j = 0; j < 100; ++j) { + map.insert({absl::StrCat(i), j}); + } + } + + for (int i = 0; i < 100; ++i) { + const std::string key = absl::StrCat(i); + auto node_handle = map.extract(key); + EXPECT_EQ(node_handle.key(), key); + EXPECT_EQ(node_handle.mapped(), 0) << i; + } + + for (int i = 0; i < 100; ++i) { + const std::string key = absl::StrCat(i); + auto node_handle = map.extract(key); + EXPECT_EQ(node_handle.key(), key); + EXPECT_EQ(node_handle.mapped(), 1) << i; + } +} + // For multisets, insert with hint also affects correctness because we need to // insert immediately before the hint if possible. struct InsertMultiHintData { @@ -2109,6 +2203,31 @@ TEST(Btree, MergeIntoMultiMapsWithDifferentComparators) { Pair(4, 1), Pair(4, 4), Pair(5, 5))); } +TEST(Btree, MergeIntoSetMovableOnly) { + absl::btree_set<MovableOnlyInstance> src; + src.insert(MovableOnlyInstance(1)); + absl::btree_multiset<MovableOnlyInstance> dst1; + dst1.insert(MovableOnlyInstance(2)); + absl::btree_set<MovableOnlyInstance> dst2; + + // Test merge into multiset. + dst1.merge(src); + + EXPECT_TRUE(src.empty()); + // ElementsAre/ElementsAreArray don't work with move-only types. + ASSERT_THAT(dst1, SizeIs(2)); + EXPECT_EQ(*dst1.begin(), MovableOnlyInstance(1)); + EXPECT_EQ(*std::next(dst1.begin()), MovableOnlyInstance(2)); + + // Test merge into set. + dst2.merge(dst1); + + EXPECT_TRUE(dst1.empty()); + ASSERT_THAT(dst2, SizeIs(2)); + EXPECT_EQ(*dst2.begin(), MovableOnlyInstance(1)); + EXPECT_EQ(*std::next(dst2.begin()), MovableOnlyInstance(2)); +} + struct KeyCompareToWeakOrdering { template <typename T> absl::weak_ordering operator()(const T &a, const T &b) const { @@ -2585,6 +2704,12 @@ struct MultiKey { int i2; }; +bool operator==(const MultiKey a, const MultiKey b) { + return a.i1 == b.i1 && a.i2 == b.i2; +} + +// A heterogeneous comparator that has different equivalence classes for +// different lookup types. struct MultiKeyComp { using is_transparent = void; bool operator()(const MultiKey a, const MultiKey b) const { @@ -2595,11 +2720,36 @@ struct MultiKeyComp { bool operator()(const MultiKey a, const int b) const { return a.i1 < b; } }; -// Test that when there's a heterogeneous comparator that behaves differently -// for some heterogeneous operators, we get equal_range() right. -TEST(Btree, MultiKeyEqualRange) { - absl::btree_set<MultiKey, MultiKeyComp> set; +// A heterogeneous, three-way comparator that has different equivalence classes +// for different lookup types. +struct MultiKeyThreeWayComp { + using is_transparent = void; + absl::weak_ordering operator()(const MultiKey a, const MultiKey b) const { + if (a.i1 < b.i1) return absl::weak_ordering::less; + if (a.i1 > b.i1) return absl::weak_ordering::greater; + if (a.i2 < b.i2) return absl::weak_ordering::less; + if (a.i2 > b.i2) return absl::weak_ordering::greater; + return absl::weak_ordering::equivalent; + } + absl::weak_ordering operator()(const int a, const MultiKey b) const { + if (a < b.i1) return absl::weak_ordering::less; + if (a > b.i1) return absl::weak_ordering::greater; + return absl::weak_ordering::equivalent; + } + absl::weak_ordering operator()(const MultiKey a, const int b) const { + if (a.i1 < b) return absl::weak_ordering::less; + if (a.i1 > b) return absl::weak_ordering::greater; + return absl::weak_ordering::equivalent; + } +}; +template <typename Compare> +class BtreeMultiKeyTest : public ::testing::Test {}; +using MultiKeyComps = ::testing::Types<MultiKeyComp, MultiKeyThreeWayComp>; +TYPED_TEST_SUITE(BtreeMultiKeyTest, MultiKeyComps); + +TYPED_TEST(BtreeMultiKeyTest, EqualRange) { + absl::btree_set<MultiKey, TypeParam> set; for (int i = 0; i < 100; ++i) { for (int j = 0; j < 100; ++j) { set.insert({i, j}); @@ -2609,11 +2759,140 @@ TEST(Btree, MultiKeyEqualRange) { for (int i = 0; i < 100; ++i) { auto equal_range = set.equal_range(i); EXPECT_EQ(equal_range.first->i1, i); - EXPECT_EQ(equal_range.first->i2, 0); + EXPECT_EQ(equal_range.first->i2, 0) << i; EXPECT_EQ(std::distance(equal_range.first, equal_range.second), 100) << i; } } +TYPED_TEST(BtreeMultiKeyTest, Extract) { + absl::btree_set<MultiKey, TypeParam> set; + for (int i = 0; i < 100; ++i) { + for (int j = 0; j < 100; ++j) { + set.insert({i, j}); + } + } + + for (int i = 0; i < 100; ++i) { + auto node_handle = set.extract(i); + EXPECT_EQ(node_handle.value().i1, i); + EXPECT_EQ(node_handle.value().i2, 0) << i; + } + + for (int i = 0; i < 100; ++i) { + auto node_handle = set.extract(i); + EXPECT_EQ(node_handle.value().i1, i); + EXPECT_EQ(node_handle.value().i2, 1) << i; + } +} + +TYPED_TEST(BtreeMultiKeyTest, Erase) { + absl::btree_set<MultiKey, TypeParam> set = { + {1, 1}, {2, 1}, {2, 2}, {3, 1}}; + EXPECT_EQ(set.erase(2), 2); + EXPECT_THAT(set, ElementsAre(MultiKey{1, 1}, MultiKey{3, 1})); +} + +TYPED_TEST(BtreeMultiKeyTest, Count) { + const absl::btree_set<MultiKey, TypeParam> set = { + {1, 1}, {2, 1}, {2, 2}, {3, 1}}; + EXPECT_EQ(set.count(2), 2); +} + +TEST(Btree, AllocConstructor) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used = 0; + Alloc alloc(&bytes_used); + Set set(alloc); + + set.insert({1, 2, 3}); + + EXPECT_THAT(set, ElementsAre(1, 2, 3)); + EXPECT_GT(bytes_used, set.size() * sizeof(int)); +} + +TEST(Btree, AllocInitializerListConstructor) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used = 0; + Alloc alloc(&bytes_used); + Set set({1, 2, 3}, alloc); + + EXPECT_THAT(set, ElementsAre(1, 2, 3)); + EXPECT_GT(bytes_used, set.size() * sizeof(int)); +} + +TEST(Btree, AllocRangeConstructor) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used = 0; + Alloc alloc(&bytes_used); + std::vector<int> v = {1, 2, 3}; + Set set(v.begin(), v.end(), alloc); + + EXPECT_THAT(set, ElementsAre(1, 2, 3)); + EXPECT_GT(bytes_used, set.size() * sizeof(int)); +} + +TEST(Btree, AllocCopyConstructor) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used1 = 0; + Alloc alloc1(&bytes_used1); + Set set1(alloc1); + + set1.insert({1, 2, 3}); + + int64_t bytes_used2 = 0; + Alloc alloc2(&bytes_used2); + Set set2(set1, alloc2); + + EXPECT_THAT(set1, ElementsAre(1, 2, 3)); + EXPECT_THAT(set2, ElementsAre(1, 2, 3)); + EXPECT_GT(bytes_used1, set1.size() * sizeof(int)); + EXPECT_EQ(bytes_used1, bytes_used2); +} + +TEST(Btree, AllocMoveConstructor_SameAlloc) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used = 0; + Alloc alloc(&bytes_used); + Set set1(alloc); + + set1.insert({1, 2, 3}); + + const int64_t original_bytes_used = bytes_used; + EXPECT_GT(original_bytes_used, set1.size() * sizeof(int)); + + Set set2(std::move(set1), alloc); + + EXPECT_THAT(set2, ElementsAre(1, 2, 3)); + EXPECT_EQ(bytes_used, original_bytes_used); +} + +TEST(Btree, AllocMoveConstructor_DifferentAlloc) { + using Alloc = CountingAllocator<int>; + using Set = absl::btree_set<int, std::less<int>, Alloc>; + int64_t bytes_used1 = 0; + Alloc alloc1(&bytes_used1); + Set set1(alloc1); + + set1.insert({1, 2, 3}); + + const int64_t original_bytes_used = bytes_used1; + EXPECT_GT(original_bytes_used, set1.size() * sizeof(int)); + + int64_t bytes_used2 = 0; + Alloc alloc2(&bytes_used2); + Set set2(std::move(set1), alloc2); + + EXPECT_THAT(set2, ElementsAre(1, 2, 3)); + // We didn't free these bytes allocated by `set1` yet. + EXPECT_EQ(bytes_used1, original_bytes_used); + EXPECT_EQ(bytes_used2, original_bytes_used); +} + } // namespace } // namespace container_internal ABSL_NAMESPACE_END |