| //===- llvm/unittest/ADT/DenseMapMap.cpp - DenseMap unit tests --*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/DenseMap.h" |
| #include "gtest/gtest.h" |
| #include <map> |
| #include <set> |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| uint32_t getTestKey(int i, uint32_t *) { return i; } |
| uint32_t getTestValue(int i, uint32_t *) { return 42 + i; } |
| |
| uint32_t *getTestKey(int i, uint32_t **) { |
| static uint32_t dummy_arr1[8192]; |
| assert(i < 8192 && "Only support 8192 dummy keys."); |
| return &dummy_arr1[i]; |
| } |
| uint32_t *getTestValue(int i, uint32_t **) { |
| static uint32_t dummy_arr1[8192]; |
| assert(i < 8192 && "Only support 8192 dummy keys."); |
| return &dummy_arr1[i]; |
| } |
| |
| /// A test class that tries to check that construction and destruction |
| /// occur correctly. |
| class CtorTester { |
| static std::set<CtorTester *> Constructed; |
| int Value; |
| |
| public: |
| explicit CtorTester(int Value = 0) : Value(Value) { |
| EXPECT_TRUE(Constructed.insert(this).second); |
| } |
| CtorTester(uint32_t Value) : Value(Value) { |
| EXPECT_TRUE(Constructed.insert(this).second); |
| } |
| CtorTester(const CtorTester &Arg) : Value(Arg.Value) { |
| EXPECT_TRUE(Constructed.insert(this).second); |
| } |
| CtorTester &operator=(const CtorTester &) = default; |
| ~CtorTester() { |
| EXPECT_EQ(1u, Constructed.erase(this)); |
| } |
| operator uint32_t() const { return Value; } |
| |
| int getValue() const { return Value; } |
| bool operator==(const CtorTester &RHS) const { return Value == RHS.Value; } |
| }; |
| |
| std::set<CtorTester *> CtorTester::Constructed; |
| |
| struct CtorTesterMapInfo { |
| static inline CtorTester getEmptyKey() { return CtorTester(-1); } |
| static inline CtorTester getTombstoneKey() { return CtorTester(-2); } |
| static unsigned getHashValue(const CtorTester &Val) { |
| return Val.getValue() * 37u; |
| } |
| static bool isEqual(const CtorTester &LHS, const CtorTester &RHS) { |
| return LHS == RHS; |
| } |
| }; |
| |
| CtorTester getTestKey(int i, CtorTester *) { return CtorTester(i); } |
| CtorTester getTestValue(int i, CtorTester *) { return CtorTester(42 + i); } |
| |
| // Test fixture, with helper functions implemented by forwarding to global |
| // function overloads selected by component types of the type parameter. This |
| // allows all of the map implementations to be tested with shared |
| // implementations of helper routines. |
| template <typename T> |
| class DenseMapTest : public ::testing::Test { |
| protected: |
| T Map; |
| |
| static typename T::key_type *const dummy_key_ptr; |
| static typename T::mapped_type *const dummy_value_ptr; |
| |
| typename T::key_type getKey(int i = 0) { |
| return getTestKey(i, dummy_key_ptr); |
| } |
| typename T::mapped_type getValue(int i = 0) { |
| return getTestValue(i, dummy_value_ptr); |
| } |
| }; |
| |
| template <typename T> |
| typename T::key_type *const DenseMapTest<T>::dummy_key_ptr = nullptr; |
| template <typename T> |
| typename T::mapped_type *const DenseMapTest<T>::dummy_value_ptr = nullptr; |
| |
| // Register these types for testing. |
| typedef ::testing::Types<DenseMap<uint32_t, uint32_t>, |
| DenseMap<uint32_t *, uint32_t *>, |
| DenseMap<CtorTester, CtorTester, CtorTesterMapInfo>, |
| SmallDenseMap<uint32_t, uint32_t>, |
| SmallDenseMap<uint32_t *, uint32_t *>, |
| SmallDenseMap<CtorTester, CtorTester, 4, |
| CtorTesterMapInfo> |
| > DenseMapTestTypes; |
| TYPED_TEST_CASE(DenseMapTest, DenseMapTestTypes); |
| |
| // Empty map tests |
| TYPED_TEST(DenseMapTest, EmptyIntMapTest) { |
| // Size tests |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| |
| // Iterator tests |
| EXPECT_TRUE(this->Map.begin() == this->Map.end()); |
| |
| // Lookup tests |
| EXPECT_FALSE(this->Map.count(this->getKey())); |
| EXPECT_TRUE(this->Map.find(this->getKey()) == this->Map.end()); |
| #if !defined(_MSC_VER) || defined(__clang__) |
| EXPECT_EQ(typename TypeParam::mapped_type(), |
| this->Map.lookup(this->getKey())); |
| #else |
| // MSVC, at least old versions, cannot parse the typename to disambiguate |
| // TypeParam::mapped_type as a type. However, because MSVC doesn't implement |
| // two-phase name lookup, it also doesn't require the typename. Deal with |
| // this mutual incompatibility through specialized code. |
| EXPECT_EQ(TypeParam::mapped_type(), |
| this->Map.lookup(this->getKey())); |
| #endif |
| } |
| |
| // Constant map tests |
| TYPED_TEST(DenseMapTest, ConstEmptyMapTest) { |
| const TypeParam &ConstMap = this->Map; |
| EXPECT_EQ(0u, ConstMap.size()); |
| EXPECT_TRUE(ConstMap.empty()); |
| EXPECT_TRUE(ConstMap.begin() == ConstMap.end()); |
| } |
| |
| // A map with a single entry |
| TYPED_TEST(DenseMapTest, SingleEntryMapTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| |
| // Size tests |
| EXPECT_EQ(1u, this->Map.size()); |
| EXPECT_FALSE(this->Map.begin() == this->Map.end()); |
| EXPECT_FALSE(this->Map.empty()); |
| |
| // Iterator tests |
| typename TypeParam::iterator it = this->Map.begin(); |
| EXPECT_EQ(this->getKey(), it->first); |
| EXPECT_EQ(this->getValue(), it->second); |
| ++it; |
| EXPECT_TRUE(it == this->Map.end()); |
| |
| // Lookup tests |
| EXPECT_TRUE(this->Map.count(this->getKey())); |
| EXPECT_TRUE(this->Map.find(this->getKey()) == this->Map.begin()); |
| EXPECT_EQ(this->getValue(), this->Map.lookup(this->getKey())); |
| EXPECT_EQ(this->getValue(), this->Map[this->getKey()]); |
| } |
| |
| // Test clear() method |
| TYPED_TEST(DenseMapTest, ClearTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| this->Map.clear(); |
| |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| EXPECT_TRUE(this->Map.begin() == this->Map.end()); |
| } |
| |
| // Test erase(iterator) method |
| TYPED_TEST(DenseMapTest, EraseTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| this->Map.erase(this->Map.begin()); |
| |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| EXPECT_TRUE(this->Map.begin() == this->Map.end()); |
| } |
| |
| // Test erase(value) method |
| TYPED_TEST(DenseMapTest, EraseTest2) { |
| this->Map[this->getKey()] = this->getValue(); |
| this->Map.erase(this->getKey()); |
| |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| EXPECT_TRUE(this->Map.begin() == this->Map.end()); |
| } |
| |
| // Test insert() method |
| TYPED_TEST(DenseMapTest, InsertTest) { |
| this->Map.insert(std::make_pair(this->getKey(), this->getValue())); |
| EXPECT_EQ(1u, this->Map.size()); |
| EXPECT_EQ(this->getValue(), this->Map[this->getKey()]); |
| } |
| |
| // Test copy constructor method |
| TYPED_TEST(DenseMapTest, CopyConstructorTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| TypeParam copyMap(this->Map); |
| |
| EXPECT_EQ(1u, copyMap.size()); |
| EXPECT_EQ(this->getValue(), copyMap[this->getKey()]); |
| } |
| |
| // Test copy constructor method where SmallDenseMap isn't small. |
| TYPED_TEST(DenseMapTest, CopyConstructorNotSmallTest) { |
| for (int Key = 0; Key < 5; ++Key) |
| this->Map[this->getKey(Key)] = this->getValue(Key); |
| TypeParam copyMap(this->Map); |
| |
| EXPECT_EQ(5u, copyMap.size()); |
| for (int Key = 0; Key < 5; ++Key) |
| EXPECT_EQ(this->getValue(Key), copyMap[this->getKey(Key)]); |
| } |
| |
| // Test copying from a default-constructed map. |
| TYPED_TEST(DenseMapTest, CopyConstructorFromDefaultTest) { |
| TypeParam copyMap(this->Map); |
| |
| EXPECT_TRUE(copyMap.empty()); |
| } |
| |
| // Test copying from an empty map where SmallDenseMap isn't small. |
| TYPED_TEST(DenseMapTest, CopyConstructorFromEmptyTest) { |
| for (int Key = 0; Key < 5; ++Key) |
| this->Map[this->getKey(Key)] = this->getValue(Key); |
| this->Map.clear(); |
| TypeParam copyMap(this->Map); |
| |
| EXPECT_TRUE(copyMap.empty()); |
| } |
| |
| // Test assignment operator method |
| TYPED_TEST(DenseMapTest, AssignmentTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| TypeParam copyMap = this->Map; |
| |
| EXPECT_EQ(1u, copyMap.size()); |
| EXPECT_EQ(this->getValue(), copyMap[this->getKey()]); |
| |
| // test self-assignment. |
| copyMap = static_cast<TypeParam &>(copyMap); |
| EXPECT_EQ(1u, copyMap.size()); |
| EXPECT_EQ(this->getValue(), copyMap[this->getKey()]); |
| } |
| |
| TYPED_TEST(DenseMapTest, AssignmentTestNotSmall) { |
| for (int Key = 0; Key < 5; ++Key) |
| this->Map[this->getKey(Key)] = this->getValue(Key); |
| TypeParam copyMap = this->Map; |
| |
| EXPECT_EQ(5u, copyMap.size()); |
| for (int Key = 0; Key < 5; ++Key) |
| EXPECT_EQ(this->getValue(Key), copyMap[this->getKey(Key)]); |
| |
| // test self-assignment. |
| copyMap = static_cast<TypeParam &>(copyMap); |
| EXPECT_EQ(5u, copyMap.size()); |
| for (int Key = 0; Key < 5; ++Key) |
| EXPECT_EQ(this->getValue(Key), copyMap[this->getKey(Key)]); |
| } |
| |
| // Test swap method |
| TYPED_TEST(DenseMapTest, SwapTest) { |
| this->Map[this->getKey()] = this->getValue(); |
| TypeParam otherMap; |
| |
| this->Map.swap(otherMap); |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| EXPECT_EQ(1u, otherMap.size()); |
| EXPECT_EQ(this->getValue(), otherMap[this->getKey()]); |
| |
| this->Map.swap(otherMap); |
| EXPECT_EQ(0u, otherMap.size()); |
| EXPECT_TRUE(otherMap.empty()); |
| EXPECT_EQ(1u, this->Map.size()); |
| EXPECT_EQ(this->getValue(), this->Map[this->getKey()]); |
| |
| // Make this more interesting by inserting 100 numbers into the map. |
| for (int i = 0; i < 100; ++i) |
| this->Map[this->getKey(i)] = this->getValue(i); |
| |
| this->Map.swap(otherMap); |
| EXPECT_EQ(0u, this->Map.size()); |
| EXPECT_TRUE(this->Map.empty()); |
| EXPECT_EQ(100u, otherMap.size()); |
| for (int i = 0; i < 100; ++i) |
| EXPECT_EQ(this->getValue(i), otherMap[this->getKey(i)]); |
| |
| this->Map.swap(otherMap); |
| EXPECT_EQ(0u, otherMap.size()); |
| EXPECT_TRUE(otherMap.empty()); |
| EXPECT_EQ(100u, this->Map.size()); |
| for (int i = 0; i < 100; ++i) |
| EXPECT_EQ(this->getValue(i), this->Map[this->getKey(i)]); |
| } |
| |
| // A more complex iteration test |
| TYPED_TEST(DenseMapTest, IterationTest) { |
| bool visited[100]; |
| std::map<typename TypeParam::key_type, unsigned> visitedIndex; |
| |
| // Insert 100 numbers into the map |
| for (int i = 0; i < 100; ++i) { |
| visited[i] = false; |
| visitedIndex[this->getKey(i)] = i; |
| |
| this->Map[this->getKey(i)] = this->getValue(i); |
| } |
| |
| // Iterate over all numbers and mark each one found. |
| for (typename TypeParam::iterator it = this->Map.begin(); |
| it != this->Map.end(); ++it) |
| visited[visitedIndex[it->first]] = true; |
| |
| // Ensure every number was visited. |
| for (int i = 0; i < 100; ++i) |
| ASSERT_TRUE(visited[i]) << "Entry #" << i << " was never visited"; |
| } |
| |
| // const_iterator test |
| TYPED_TEST(DenseMapTest, ConstIteratorTest) { |
| // Check conversion from iterator to const_iterator. |
| typename TypeParam::iterator it = this->Map.begin(); |
| typename TypeParam::const_iterator cit(it); |
| EXPECT_TRUE(it == cit); |
| |
| // Check copying of const_iterators. |
| typename TypeParam::const_iterator cit2(cit); |
| EXPECT_TRUE(cit == cit2); |
| } |
| |
| namespace { |
| // Simple class that counts how many moves and copy happens when growing a map |
| struct CountCopyAndMove { |
| static int Move; |
| static int Copy; |
| CountCopyAndMove() {} |
| |
| CountCopyAndMove(const CountCopyAndMove &) { Copy++; } |
| CountCopyAndMove &operator=(const CountCopyAndMove &) { |
| Copy++; |
| return *this; |
| } |
| CountCopyAndMove(CountCopyAndMove &&) { Move++; } |
| CountCopyAndMove &operator=(const CountCopyAndMove &&) { |
| Move++; |
| return *this; |
| } |
| }; |
| int CountCopyAndMove::Copy = 0; |
| int CountCopyAndMove::Move = 0; |
| |
| } // anonymous namespace |
| |
| // Test initializer list construction. |
| TEST(DenseMapCustomTest, InitializerList) { |
| DenseMap<int, int> M({{0, 0}, {0, 1}, {1, 2}}); |
| EXPECT_EQ(2u, M.size()); |
| EXPECT_EQ(1u, M.count(0)); |
| EXPECT_EQ(0, M[0]); |
| EXPECT_EQ(1u, M.count(1)); |
| EXPECT_EQ(2, M[1]); |
| } |
| |
| // Test initializer list construction. |
| TEST(DenseMapCustomTest, EqualityComparison) { |
| DenseMap<int, int> M1({{0, 0}, {1, 2}}); |
| DenseMap<int, int> M2({{0, 0}, {1, 2}}); |
| DenseMap<int, int> M3({{0, 0}, {1, 3}}); |
| |
| EXPECT_EQ(M1, M2); |
| EXPECT_NE(M1, M3); |
| } |
| |
| // Test for the default minimum size of a DenseMap |
| TEST(DenseMapCustomTest, DefaultMinReservedSizeTest) { |
| // IF THIS VALUE CHANGE, please update InitialSizeTest, InitFromIterator, and |
| // ReserveTest as well! |
| const int ExpectedInitialBucketCount = 64; |
| // Formula from DenseMap::getMinBucketToReserveForEntries() |
| const int ExpectedMaxInitialEntries = ExpectedInitialBucketCount * 3 / 4 - 1; |
| |
| DenseMap<int, CountCopyAndMove> Map; |
| // Will allocate 64 buckets |
| Map.reserve(1); |
| unsigned MemorySize = Map.getMemorySize(); |
| CountCopyAndMove::Copy = 0; |
| CountCopyAndMove::Move = 0; |
| for (int i = 0; i < ExpectedMaxInitialEntries; ++i) |
| Map.insert(std::pair<int, CountCopyAndMove>(std::piecewise_construct, |
| std::forward_as_tuple(i), |
| std::forward_as_tuple())); |
| // Check that we didn't grow |
| EXPECT_EQ(MemorySize, Map.getMemorySize()); |
| // Check that move was called the expected number of times |
| EXPECT_EQ(ExpectedMaxInitialEntries, CountCopyAndMove::Move); |
| // Check that no copy occurred |
| EXPECT_EQ(0, CountCopyAndMove::Copy); |
| |
| // Adding one extra element should grow the map |
| Map.insert(std::pair<int, CountCopyAndMove>( |
| std::piecewise_construct, |
| std::forward_as_tuple(ExpectedMaxInitialEntries), |
| std::forward_as_tuple())); |
| // Check that we grew |
| EXPECT_NE(MemorySize, Map.getMemorySize()); |
| // Check that move was called the expected number of times |
| // This relies on move-construction elision, and cannot be reliably tested. |
| // EXPECT_EQ(ExpectedMaxInitialEntries + 2, CountCopyAndMove::Move); |
| // Check that no copy occurred |
| EXPECT_EQ(0, CountCopyAndMove::Copy); |
| } |
| |
| // Make sure creating the map with an initial size of N actually gives us enough |
| // buckets to insert N items without increasing allocation size. |
| TEST(DenseMapCustomTest, InitialSizeTest) { |
| // Test a few different sizes, 48 is *not* a random choice: we need a value |
| // that is 2/3 of a power of two to stress the grow() condition, and the power |
| // of two has to be at least 64 because of minimum size allocation in the |
| // DenseMap (see DefaultMinReservedSizeTest). 66 is a value just above the |
| // 64 default init. |
| for (auto Size : {1, 2, 48, 66}) { |
| DenseMap<int, CountCopyAndMove> Map(Size); |
| unsigned MemorySize = Map.getMemorySize(); |
| CountCopyAndMove::Copy = 0; |
| CountCopyAndMove::Move = 0; |
| for (int i = 0; i < Size; ++i) |
| Map.insert(std::pair<int, CountCopyAndMove>(std::piecewise_construct, |
| std::forward_as_tuple(i), |
| std::forward_as_tuple())); |
| // Check that we didn't grow |
| EXPECT_EQ(MemorySize, Map.getMemorySize()); |
| // Check that move was called the expected number of times |
| EXPECT_EQ(Size, CountCopyAndMove::Move); |
| // Check that no copy occurred |
| EXPECT_EQ(0, CountCopyAndMove::Copy); |
| } |
| } |
| |
| // Make sure creating the map with a iterator range does not trigger grow() |
| TEST(DenseMapCustomTest, InitFromIterator) { |
| std::vector<std::pair<int, CountCopyAndMove>> Values; |
| // The size is a random value greater than 64 (hardcoded DenseMap min init) |
| const int Count = 65; |
| for (int i = 0; i < Count; i++) |
| Values.emplace_back(i, CountCopyAndMove()); |
| |
| CountCopyAndMove::Move = 0; |
| CountCopyAndMove::Copy = 0; |
| DenseMap<int, CountCopyAndMove> Map(Values.begin(), Values.end()); |
| // Check that no move occurred |
| EXPECT_EQ(0, CountCopyAndMove::Move); |
| // Check that copy was called the expected number of times |
| EXPECT_EQ(Count, CountCopyAndMove::Copy); |
| } |
| |
| // Make sure reserve actually gives us enough buckets to insert N items |
| // without increasing allocation size. |
| TEST(DenseMapCustomTest, ReserveTest) { |
| // Test a few different size, 48 is *not* a random choice: we need a value |
| // that is 2/3 of a power of two to stress the grow() condition, and the power |
| // of two has to be at least 64 because of minimum size allocation in the |
| // DenseMap (see DefaultMinReservedSizeTest). 66 is a value just above the |
| // 64 default init. |
| for (auto Size : {1, 2, 48, 66}) { |
| DenseMap<int, CountCopyAndMove> Map; |
| Map.reserve(Size); |
| unsigned MemorySize = Map.getMemorySize(); |
| CountCopyAndMove::Copy = 0; |
| CountCopyAndMove::Move = 0; |
| for (int i = 0; i < Size; ++i) |
| Map.insert(std::pair<int, CountCopyAndMove>(std::piecewise_construct, |
| std::forward_as_tuple(i), |
| std::forward_as_tuple())); |
| // Check that we didn't grow |
| EXPECT_EQ(MemorySize, Map.getMemorySize()); |
| // Check that move was called the expected number of times |
| EXPECT_EQ(Size, CountCopyAndMove::Move); |
| // Check that no copy occurred |
| EXPECT_EQ(0, CountCopyAndMove::Copy); |
| } |
| } |
| |
| // Make sure DenseMap works with StringRef keys. |
| TEST(DenseMapCustomTest, StringRefTest) { |
| DenseMap<StringRef, int> M; |
| |
| M["a"] = 1; |
| M["b"] = 2; |
| M["c"] = 3; |
| |
| EXPECT_EQ(3u, M.size()); |
| EXPECT_EQ(1, M.lookup("a")); |
| EXPECT_EQ(2, M.lookup("b")); |
| EXPECT_EQ(3, M.lookup("c")); |
| |
| EXPECT_EQ(0, M.lookup("q")); |
| |
| // Test the empty string, spelled various ways. |
| EXPECT_EQ(0, M.lookup("")); |
| EXPECT_EQ(0, M.lookup(StringRef())); |
| EXPECT_EQ(0, M.lookup(StringRef("a", 0))); |
| M[""] = 42; |
| EXPECT_EQ(42, M.lookup("")); |
| EXPECT_EQ(42, M.lookup(StringRef())); |
| EXPECT_EQ(42, M.lookup(StringRef("a", 0))); |
| } |
| |
| // Key traits that allows lookup with either an unsigned or char* key; |
| // In the latter case, "a" == 0, "b" == 1 and so on. |
| struct TestDenseMapInfo { |
| static inline unsigned getEmptyKey() { return ~0; } |
| static inline unsigned getTombstoneKey() { return ~0U - 1; } |
| static unsigned getHashValue(const unsigned& Val) { return Val * 37U; } |
| static unsigned getHashValue(const char* Val) { |
| return (unsigned)(Val[0] - 'a') * 37U; |
| } |
| static bool isEqual(const unsigned& LHS, const unsigned& RHS) { |
| return LHS == RHS; |
| } |
| static bool isEqual(const char* LHS, const unsigned& RHS) { |
| return (unsigned)(LHS[0] - 'a') == RHS; |
| } |
| }; |
| |
| // find_as() tests |
| TEST(DenseMapCustomTest, FindAsTest) { |
| DenseMap<unsigned, unsigned, TestDenseMapInfo> map; |
| map[0] = 1; |
| map[1] = 2; |
| map[2] = 3; |
| |
| // Size tests |
| EXPECT_EQ(3u, map.size()); |
| |
| // Normal lookup tests |
| EXPECT_EQ(1u, map.count(1)); |
| EXPECT_EQ(1u, map.find(0)->second); |
| EXPECT_EQ(2u, map.find(1)->second); |
| EXPECT_EQ(3u, map.find(2)->second); |
| EXPECT_TRUE(map.find(3) == map.end()); |
| |
| // find_as() tests |
| EXPECT_EQ(1u, map.find_as("a")->second); |
| EXPECT_EQ(2u, map.find_as("b")->second); |
| EXPECT_EQ(3u, map.find_as("c")->second); |
| EXPECT_TRUE(map.find_as("d") == map.end()); |
| } |
| |
| struct ContiguousDenseMapInfo { |
| static inline unsigned getEmptyKey() { return ~0; } |
| static inline unsigned getTombstoneKey() { return ~0U - 1; } |
| static unsigned getHashValue(const unsigned& Val) { return Val; } |
| static bool isEqual(const unsigned& LHS, const unsigned& RHS) { |
| return LHS == RHS; |
| } |
| }; |
| |
| // Test that filling a small dense map with exactly the number of elements in |
| // the map grows to have enough space for an empty bucket. |
| TEST(DenseMapCustomTest, SmallDenseMapGrowTest) { |
| SmallDenseMap<unsigned, unsigned, 32, ContiguousDenseMapInfo> map; |
| // Add some number of elements, then delete a few to leave us some tombstones. |
| // If we just filled the map with 32 elements we'd grow because of not enough |
| // tombstones which masks the issue here. |
| for (unsigned i = 0; i < 20; ++i) |
| map[i] = i + 1; |
| for (unsigned i = 0; i < 10; ++i) |
| map.erase(i); |
| for (unsigned i = 20; i < 32; ++i) |
| map[i] = i + 1; |
| |
| // Size tests |
| EXPECT_EQ(22u, map.size()); |
| |
| // Try to find an element which doesn't exist. There was a bug in |
| // SmallDenseMap which led to a map with num elements == small capacity not |
| // having an empty bucket any more. Finding an element not in the map would |
| // therefore never terminate. |
| EXPECT_TRUE(map.find(32) == map.end()); |
| } |
| |
| TEST(DenseMapCustomTest, TryEmplaceTest) { |
| DenseMap<int, std::unique_ptr<int>> Map; |
| std::unique_ptr<int> P(new int(2)); |
| auto Try1 = Map.try_emplace(0, new int(1)); |
| EXPECT_TRUE(Try1.second); |
| auto Try2 = Map.try_emplace(0, std::move(P)); |
| EXPECT_FALSE(Try2.second); |
| EXPECT_EQ(Try1.first, Try2.first); |
| EXPECT_NE(nullptr, P); |
| } |
| |
| TEST(DenseMapCustomTest, ConstTest) { |
| // Test that const pointers work okay for count and find, even when the |
| // underlying map is a non-const pointer. |
| DenseMap<int *, int> Map; |
| int A; |
| int *B = &A; |
| const int *C = &A; |
| Map.insert({B, 0}); |
| EXPECT_EQ(Map.count(B), 1u); |
| EXPECT_EQ(Map.count(C), 1u); |
| EXPECT_NE(Map.find(B), Map.end()); |
| EXPECT_NE(Map.find(C), Map.end()); |
| } |
| } |