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#include "shared_data.h"
#include <library/cpp/testing/unittest/registar.h>
#include <util/generic/hash.h>
#include <util/generic/deque.h>
#include <util/system/sys_alloc.h>
namespace NActors {
Y_UNIT_TEST_SUITE(TSharedDataTest) {
Y_UNIT_TEST(BasicBehavior) {
auto data = TSharedData::Copy("Hello", 5);
UNIT_ASSERT(data.IsPrivate());
UNIT_ASSERT(!data.IsShared());
UNIT_ASSERT_VALUES_EQUAL(data.size(), 5u);
UNIT_ASSERT_VALUES_EQUAL(data.end() - data.begin(), 5u);
UNIT_ASSERT_VALUES_EQUAL(data.mutable_end() - data.mutable_begin(), 5u);
UNIT_ASSERT(data.begin() == data.data());
UNIT_ASSERT(data.mutable_data() == data.data());
UNIT_ASSERT(data.mutable_begin() == data.mutable_data());
UNIT_ASSERT_VALUES_EQUAL(data.ToString(), TString("Hello"));
UNIT_ASSERT_VALUES_EQUAL(::memcmp(data.data(), "Hello", 5), 0);
auto link = data;
UNIT_ASSERT(!link.IsPrivate());
UNIT_ASSERT(!data.IsPrivate());
UNIT_ASSERT(link.IsShared());
UNIT_ASSERT(data.IsShared());
UNIT_ASSERT(link.data() == data.data());
UNIT_ASSERT(link.size() == data.size());
link = { };
UNIT_ASSERT(link.IsPrivate());
UNIT_ASSERT(data.IsPrivate());
UNIT_ASSERT(!link.IsShared());
UNIT_ASSERT(!data.IsShared());
UNIT_ASSERT_VALUES_EQUAL(TString(TStringBuf(data)), TString("Hello"));
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice()), TString("Hello"));
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice(1)), TString("ello"));
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice(1, 3)), TString("ell"));
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice(1, 100)), TString("ello"));
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice(0, 4)), TString("Hell"));
link = data;
UNIT_ASSERT(link.data() == data.data());
UNIT_ASSERT_VALUES_UNEQUAL(link.Detach(), data.data());
UNIT_ASSERT_EQUAL(data.size(), link.size());
UNIT_ASSERT_VALUES_EQUAL(TString(data.Slice()), TString(link.Slice()));
}
Y_UNIT_TEST(TrimBehavior) {
auto data = TSharedData::Uninitialized(42);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 42u);
UNIT_ASSERT(data.data() != nullptr);
// Trim to non-zero does not change addresses
const char* ptr1 = data.data();
data.TrimBack(31);
const char* ptr2 = data.data();
UNIT_ASSERT_VALUES_EQUAL(data.size(), 31u);
UNIT_ASSERT(ptr1 == ptr2);
// Trim to zero releases underlying data
data.TrimBack(0);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 0u);
UNIT_ASSERT(data.data() == nullptr);
}
class TCustomOwner : public TSharedData::IOwner {
using THeader = TSharedData::THeader;
public:
TSharedData Allocate(size_t size) {
char* raw = reinterpret_cast<char*>(y_allocate(sizeof(THeader) + size));
THeader* header = reinterpret_cast<THeader*>(raw);
header->RefCount = 1;
header->Owner = this;
char* data = raw + sizeof(THeader);
Y_VERIFY(Allocated_.insert(data).second);
return TSharedData::AttachUnsafe(data, size);
}
void Deallocate(char* data) noexcept {
Y_VERIFY(Allocated_.erase(data) > 0);
char* raw = data - sizeof(THeader);
y_deallocate(raw);
Deallocated_.push_back(data);
}
char* NextDeallocated() {
char* result = nullptr;
if (Deallocated_) {
result = Deallocated_.front();
Deallocated_.pop_front();
}
return result;
}
private:
THashSet<void*> Allocated_;
TDeque<char*> Deallocated_;
};
Y_UNIT_TEST(CustomOwner) {
TCustomOwner owner;
const char* ptr;
// Test destructor releases data
{
auto data = owner.Allocate(42);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 42u);
ptr = data.data();
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
// Test assignment releases data
{
auto data = owner.Allocate(42);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 42u);
ptr = data.data();
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
data = { };
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
// Test copies keep references correctly
{
auto data = owner.Allocate(42);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 42u);
ptr = data.data();
auto copy = data;
UNIT_ASSERT_VALUES_EQUAL(copy.size(), 42u);
UNIT_ASSERT(copy.data() == ptr);
data = { };
UNIT_ASSERT_VALUES_EQUAL(data.size(), 0u);
UNIT_ASSERT(data.data() == nullptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
// Test assignment releases correct data
{
auto data1 = owner.Allocate(42);
UNIT_ASSERT_VALUES_EQUAL(data1.size(), 42u);
auto data2 = owner.Allocate(31);
UNIT_ASSERT_VALUES_EQUAL(data2.size(), 31u);
ptr = data1.data();
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
data1 = data2;
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
ptr = data2.data();
UNIT_ASSERT_VALUES_EQUAL(data1.size(), 31u);
UNIT_ASSERT(data1.data() == ptr);
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
// Test moves don't produce dangling references
{
auto data = owner.Allocate(42);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 42u);
ptr = data.data();
auto moved = std::move(data);
UNIT_ASSERT_VALUES_EQUAL(moved.size(), 42u);
UNIT_ASSERT(moved.data() == ptr);
UNIT_ASSERT_VALUES_EQUAL(data.size(), 0u);
UNIT_ASSERT(data.data() == nullptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
// Test Detach copies correctly and doesn't affect owned data
{
auto data = owner.Allocate(42);
auto disowned = data;
disowned.Detach();
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
}
UNIT_ASSERT(owner.NextDeallocated() == ptr);
UNIT_ASSERT(owner.NextDeallocated() == nullptr);
}
}
}
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