Tools/TestWebKitAPI/Tests/WTF/NakedPtr.cpp

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#include "config.h"

#include "RefLogger.h"
#include <wtf/NakedPtr.h>

namespace TestWebKitAPI {

// For these tests, we need a base class and a derived class. For this purpose,
// we reuse the RefLogger and DerivedRefLogger classes.

TEST(WTF_NakedPtr, Basic)
{
    DerivedRefLogger a("a");

    NakedPtr<RefLogger> empty;
    ASSERT_EQ(nullptr, empty.get());

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ASSERT_EQ(&a, &*ptr);
        ASSERT_EQ(&a.name, &ptr->name);
    }

    {
        NakedPtr<RefLogger> ptr = &a;
        ASSERT_EQ(&a, ptr.get());
    }

    {
        NakedPtr<RefLogger> p1 = &a;
        NakedPtr<RefLogger> p2(p1);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<RefLogger> p1 = &a;
        NakedPtr<RefLogger> p2 = p1;
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<RefLogger> p1 = &a;
        NakedPtr<RefLogger> p2 = WTFMove(p1);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<RefLogger> p1 = &a;
        NakedPtr<RefLogger> p2(WTFMove(p1));
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<DerivedRefLogger> p1 = &a;
        NakedPtr<RefLogger> p2 = p1;
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<DerivedRefLogger> p1 = &a;
        NakedPtr<RefLogger> p2 = WTFMove(p1);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr.clear();
        ASSERT_EQ(nullptr, ptr.get());
    }
}

TEST(WTF_NakedPtr, Assignment)
{
    DerivedRefLogger a("a");
    RefLogger b("b");
    DerivedRefLogger c("c");

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        p1 = p2;
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(&b, p2.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr = &b;
        ASSERT_EQ(&b, ptr.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr = nullptr;
        ASSERT_EQ(nullptr, ptr.get());
    }

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        p1 = WTFMove(p2);
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(&b, p2.get());
    }

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<DerivedRefLogger> p2(&c);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&c, p2.get());
        p1 = p2;
        ASSERT_EQ(&c, p1.get());
        ASSERT_EQ(&c, p2.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr = &c;
        ASSERT_EQ(&c, ptr.get());
    }

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<DerivedRefLogger> p2(&c);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&c, p2.get());
        p1 = WTFMove(p2);
        ASSERT_EQ(&c, p1.get());
        ASSERT_EQ(&c, p2.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
#if COMPILER(CLANG)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunknown-pragmas"
#pragma clang diagnostic ignored "-Wunknown-warning-option"
#pragma clang diagnostic ignored "-Wself-assign-overloaded"
#endif
        ptr = ptr;
#if COMPILER(CLANG)
#pragma clang diagnostic pop
#endif
        ASSERT_EQ(&a, ptr.get());
    }

    {
        NakedPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
#if COMPILER(CLANG)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunknown-pragmas"
#pragma clang diagnostic ignored "-Wself-move"
#endif
        ptr = WTFMove(ptr);
#if COMPILER(CLANG)
#pragma clang diagnostic pop
#endif
        ASSERT_EQ(&a, ptr.get());
    }
}

TEST(WTF_NakedPtr, Swap)
{
    RefLogger a("a");
    RefLogger b("b");

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        p1.swap(p2);
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(&a, p2.get());
    }

    {
        NakedPtr<RefLogger> p1(&a);
        NakedPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        std::swap(p1, p2);
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
}

NakedPtr<RefLogger> nakedPtrFoo(RefLogger& logger)
{
    return NakedPtr<RefLogger>(&logger);
}

TEST(WTF_NakedPtr, ReturnValue)
{
    DerivedRefLogger a("a");

    {
        auto ptr = nakedPtrFoo(a);
        ASSERT_EQ(&a, ptr.get());
        ASSERT_EQ(&a, &*ptr);
        ASSERT_EQ(&a.name, &ptr->name);
    }
}

} // namespace TestWebKitAPI