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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/sparse_vector.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
namespace blink {
namespace {
enum class FieldId {
kFirst = 0,
kFoo = 1,
kBar = 2,
kFive = 5,
kBang = 20,
kLast = 31,
kNumFields = kLast + 1
};
struct IntFieldTest {
SparseVector<FieldId, int> sparse_vector;
using Handle = std::unique_ptr<IntFieldTest>;
static Handle MakeTest() { return std::make_unique<IntFieldTest>(); }
static int CreateField(int value) { return value; }
static int GetValue(int field) { return field; }
};
struct UniquePtrFieldTest {
public:
SparseVector<FieldId, std::unique_ptr<int>> sparse_vector;
using Handle = std::unique_ptr<UniquePtrFieldTest>;
static Handle MakeTest() { return std::make_unique<UniquePtrFieldTest>(); }
static std::unique_ptr<int> CreateField(int value) {
return std::make_unique<int>(value);
}
static int GetValue(const std::unique_ptr<int>& field) { return *field; }
};
struct TraceableFieldTest : GarbageCollected<TraceableFieldTest> {
public:
struct Traceable {
int value;
void Trace(Visitor*) const {}
DISALLOW_NEW();
};
SparseVector<FieldId, Traceable> sparse_vector;
void Trace(Visitor* visitor) const { visitor->Trace(sparse_vector); }
using Handle = Persistent<TraceableFieldTest>;
static TraceableFieldTest* MakeTest() {
return MakeGarbageCollected<TraceableFieldTest>();
}
static Traceable CreateField(int value) { return Traceable{value}; }
static int GetValue(const Traceable& field) { return field.value; }
};
struct MemberFieldTest : GarbageCollected<MemberFieldTest> {
public:
struct GCObject : public GarbageCollected<GCObject> {
explicit GCObject(int value) : value(value) {}
int value;
void Trace(Visitor*) const {}
};
SparseVector<FieldId, Member<GCObject>> sparse_vector;
void Trace(Visitor* visitor) const { visitor->Trace(sparse_vector); }
using Handle = Persistent<MemberFieldTest>;
static MemberFieldTest* MakeTest() {
return MakeGarbageCollected<MemberFieldTest>();
}
static GCObject* CreateField(int value) {
return MakeGarbageCollected<GCObject>(value);
}
static int GetValue(const Member<GCObject>& field) { return field->value; }
};
template <typename TestType>
class SparseVectorTest : public testing::Test {
protected:
void SetField(FieldId field_id, int value) {
sparse_vector().SetField(field_id, TestType::CreateField(value));
}
int GetField(FieldId field_id) {
return TestType::GetValue(sparse_vector().GetField(field_id));
}
bool EraseField(FieldId field_id) {
return sparse_vector().EraseField(field_id);
}
void CheckHasFields(std::initializer_list<FieldId> field_ids) {
for (auto id = FieldId::kFirst; id <= FieldId::kLast;
id = static_cast<FieldId>(static_cast<unsigned>(id) + 1)) {
EXPECT_EQ(std::count(field_ids.begin(), field_ids.end(), id),
sparse_vector().HasField(id))
<< static_cast<unsigned>(id);
for (auto last_id = id; last_id <= FieldId::kLast;
last_id = static_cast<FieldId>(static_cast<unsigned>(last_id) + 1)) {
bool has_in_range = std::any_of(
field_ids.begin(), field_ids.end(),
[id, last_id](FieldId i) { return i >= id && i <= last_id; });
EXPECT_EQ(has_in_range, sparse_vector().HasFieldInRange(id, last_id))
<< static_cast<unsigned>(id) << "-"
<< static_cast<unsigned>(last_id);
}
}
}
auto& sparse_vector() { return test_->sparse_vector; }
private:
typename TestType::Handle test_ = TestType::MakeTest();
};
using TestTypes = ::testing::Types<IntFieldTest,
UniquePtrFieldTest,
TraceableFieldTest,
MemberFieldTest>;
TYPED_TEST_SUITE(SparseVectorTest, TestTypes);
TYPED_TEST(SparseVectorTest, Basic) {
this->CheckHasFields({});
this->SetField(FieldId::kFoo, 101);
this->CheckHasFields({FieldId::kFoo});
EXPECT_EQ(101, this->GetField(FieldId::kFoo));
this->SetField(FieldId::kBar, 202);
this->CheckHasFields({FieldId::kFoo, FieldId::kBar});
EXPECT_EQ(202, this->GetField(FieldId::kBar));
this->sparse_vector().clear();
this->CheckHasFields({});
}
TYPED_TEST(SparseVectorTest, MemoryUsage) {
// An empty vector should not use any memory.
EXPECT_TRUE(this->sparse_vector().empty());
EXPECT_EQ(0u, this->sparse_vector().size());
EXPECT_EQ(0u, this->sparse_vector().capacity());
this->SetField(FieldId::kBang, 101);
EXPECT_FALSE(this->sparse_vector().empty());
EXPECT_EQ(1u, this->sparse_vector().size());
EXPECT_GE(this->sparse_vector().capacity(), 1u);
this->SetField(FieldId::kLast, 202);
EXPECT_FALSE(this->sparse_vector().empty());
EXPECT_EQ(2u, this->sparse_vector().size());
EXPECT_GE(this->sparse_vector().capacity(), 2u);
this->sparse_vector().reserve(10);
EXPECT_FALSE(this->sparse_vector().empty());
EXPECT_EQ(2u, this->sparse_vector().size());
EXPECT_GE(this->sparse_vector().capacity(), 10u);
}
TYPED_TEST(SparseVectorTest, FirstAndLastValues) {
this->SetField(FieldId::kBang, 101);
this->CheckHasFields({FieldId::kBang});
EXPECT_EQ(101, this->GetField(FieldId::kBang));
this->SetField(FieldId::kFirst, 99);
this->SetField(FieldId::kLast, 202);
this->CheckHasFields({FieldId::kFirst, FieldId::kBang, FieldId::kLast});
EXPECT_EQ(99, this->GetField(FieldId::kFirst));
EXPECT_EQ(101, this->GetField(FieldId::kBang));
EXPECT_EQ(202, this->GetField(FieldId::kLast));
}
TYPED_TEST(SparseVectorTest, MutateValue) {
this->SetField(FieldId::kFoo, 101);
EXPECT_EQ(101, this->GetField(FieldId::kFoo));
this->SetField(FieldId::kFoo, 202);
EXPECT_EQ(202, this->GetField(FieldId::kFoo));
}
TYPED_TEST(SparseVectorTest, EraseField) {
this->SetField(FieldId::kFoo, 101);
this->SetField(FieldId::kBar, 202);
EXPECT_EQ(101, this->GetField(FieldId::kFoo));
EXPECT_EQ(202, this->GetField(FieldId::kBar));
// Should successfully remove the field.
EXPECT_TRUE(this->EraseField(FieldId::kBar));
this->CheckHasFields({FieldId::kFoo});
EXPECT_EQ(101, this->GetField(FieldId::kFoo));
// Multiple clears should return false since the value is already empty.
EXPECT_FALSE(this->EraseField(FieldId::kBar));
this->CheckHasFields({FieldId::kFoo});
EXPECT_EQ(101, this->GetField(FieldId::kFoo));
EXPECT_TRUE(this->EraseField(FieldId::kFoo));
this->CheckHasFields({});
}
TYPED_TEST(SparseVectorTest, DoesNotOverwriteFieldsWithSmallerIndices) {
this->SetField(FieldId::kFive, 42);
this->SetField(FieldId::kBar, 29);
EXPECT_EQ(42, this->GetField(FieldId::kFive));
EXPECT_EQ(29, this->GetField(FieldId::kBar));
}
TYPED_TEST(SparseVectorTest, DoesNotOverwriteFieldsWithLargerIndices) {
this->SetField(FieldId::kBar, 29);
this->SetField(FieldId::kFive, 42);
EXPECT_EQ(42, this->GetField(FieldId::kFive));
EXPECT_EQ(29, this->GetField(FieldId::kBar));
}
TEST(SparseVectorPtrTest, SettingToNullptrMaintainsField) {
SparseVector<FieldId, std::unique_ptr<int>> sparse_vector;
EXPECT_FALSE(sparse_vector.HasField(FieldId::kFoo));
sparse_vector.SetField(FieldId::kFoo, nullptr);
EXPECT_TRUE(sparse_vector.HasField(FieldId::kFoo));
EXPECT_EQ(nullptr, sparse_vector.GetField(FieldId::kFoo));
sparse_vector.SetField(FieldId::kFoo, std::make_unique<int>(101));
EXPECT_EQ(101, *sparse_vector.GetField(FieldId::kFoo));
EXPECT_TRUE(sparse_vector.HasField(FieldId::kFoo));
sparse_vector.SetField(FieldId::kFoo, nullptr);
EXPECT_TRUE(sparse_vector.HasField(FieldId::kFoo));
EXPECT_EQ(nullptr, sparse_vector.GetField(FieldId::kFoo));
EXPECT_TRUE(sparse_vector.EraseField(FieldId::kFoo));
EXPECT_FALSE(sparse_vector.HasField(FieldId::kFoo));
}
// WTF::Vector always uses 0 inline capacity when ANNOTATE_CONTIGUOUS_CONTAINER
// is defined.
#ifndef ANNOTATE_CONTIGUOUS_CONTAINER
TEST(SparseVectorInlineCapacityTest, Basic) {
SparseVector<FieldId, int, 16> sparse_vector;
EXPECT_EQ(16u, sparse_vector.capacity());
EXPECT_GT(sizeof(sparse_vector), sizeof(int) * 16);
}
#endif
} // namespace
} // namespace blink
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