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test_derived.cc
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test_derived.cc
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#include "static_ptr.h"
#include <gtest/gtest.h>
#include <vector>
namespace {
using EventsType = std::vector<std::string>;
class IEngine {
public:
IEngine(EventsType& events) : Events_{events} {}
const EventsType& Events() const { return Events_; }
virtual ~IEngine() = default;
virtual void Do() = 0;
protected:
EventsType& Events_;
};
class TSteamEngine : public IEngine {
public:
TSteamEngine(EventsType& events) : IEngine{events} {
Events_.push_back("TSteamEngine::TSteamEngine()");
}
TSteamEngine(TSteamEngine&& engine) : IEngine{engine} {
Events_.push_back("TSteamEngine::TSteamEngine(TSteamEngine&&)");
}
TSteamEngine& operator=(TSteamEngine&& engine) {
Events_.push_back("operator=(TSteamEngine&&)");
return *this;
}
void Do() override {
Events_.push_back("TSteamEngine::Do()");
}
~TSteamEngine() {
Events_.push_back("TSteamEngine::~TSteamEngine()");
}
};
class TJetEngine : public IEngine {
public:
TJetEngine(EventsType& events) : IEngine{events} {
Events_.push_back("TJetEngine::TJetEngine()");
}
TJetEngine(TJetEngine&& engine) : IEngine{engine} {
Events_.push_back("TJetEngine::TJetEngine(TJetEngine&&)");
}
TJetEngine& operator=(TJetEngine&& engine) {
Events_.push_back("operator=(TJetEngine&&)");
return *this;
}
void Do() override {
Events_.push_back("TJetEngine::Do()");
}
~TJetEngine() {
Events_.push_back("TJetEngine::~TJetEngine()");
}
};
} // namespace
TEST(Derived, WithoutStaticPtr) {
EventsType events;
{
TSteamEngine engine{events};
engine.Do();
}
const EventsType expected{
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, NoOpStaticPtr) {
EventsType events;
{
auto engine = sp::make_static<TSteamEngine>(events);
engine->Do();
}
const EventsType expected{
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, EmplaceBase) {
EventsType events;
{
sp::static_ptr<IEngine> engine;
EXPECT_TRUE(!engine);
engine.emplace<TSteamEngine>(events);
EXPECT_TRUE(engine);
engine->Do();
}
const EventsType expected{
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, EmplaceNewObjectSameType) {
EventsType events;
{
sp::static_ptr<IEngine> engine;
EXPECT_TRUE(!engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) == nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) == nullptr);
engine.emplace<TSteamEngine>(events);
EXPECT_TRUE(engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) != nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) == nullptr);
engine->Do();
engine.emplace<TSteamEngine>(events);
EXPECT_TRUE(engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) != nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) == nullptr);
engine->Do();
}
const EventsType expected{
// emplace steam engine
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
// emplace steam engine again
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, EmplaceNewObjectChangeType) {
EventsType events;
{
sp::static_ptr<IEngine> engine;
EXPECT_TRUE(!engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) == nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) == nullptr);
engine.emplace<TSteamEngine>(events);
EXPECT_TRUE(engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) != nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) == nullptr);
engine->Do();
engine.emplace<TJetEngine>(events);
EXPECT_TRUE(engine);
EXPECT_TRUE(dynamic_cast<TSteamEngine*>(engine.get()) == nullptr);
EXPECT_TRUE(dynamic_cast<TJetEngine*>(engine.get()) != nullptr);
engine->Do();
}
const EventsType expected{
// emplace steam engine
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
// emplace jet engine
"TJetEngine::TJetEngine()",
"TJetEngine::Do()",
"TJetEngine::~TJetEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, MoveAssignSameType) {
EventsType events;
{
sp::static_ptr<IEngine> engine;
engine.emplace<TSteamEngine>(events);
engine->Do();
engine = sp::make_static<TSteamEngine>(events);
engine->Do();
}
const EventsType expected{
// first engine's work
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
// second engine's creation and MOVE ASSIGN and deletion of tmp object
"TSteamEngine::TSteamEngine()",
"operator=(TSteamEngine&&)",
"TSteamEngine::~TSteamEngine()",
// second engine's work and deletion
"TSteamEngine::Do()",
"TSteamEngine::~TSteamEngine()",
};
EXPECT_EQ(events, expected);
}
TEST(Derived, MoveAssignChangeType) {
EventsType events;
{
sp::static_ptr<IEngine> engine;
engine.emplace<TSteamEngine>(events);
engine->Do();
engine = sp::make_static<TJetEngine>(events);
engine->Do();
}
const EventsType expected{
// first engine's work
"TSteamEngine::TSteamEngine()",
"TSteamEngine::Do()",
// second engine's creation
"TJetEngine::TJetEngine()",
// first engine's deletion
"TSteamEngine::~TSteamEngine()",
// second engine's MOVE CONSTRUCTION and deletion of tmp object
"TJetEngine::TJetEngine(TJetEngine&&)",
"TJetEngine::~TJetEngine()",
// second engine's work and deletion
"TJetEngine::Do()",
"TJetEngine::~TJetEngine()",
};
EXPECT_EQ(events, expected);
}