Tools/TestWebKitAPI/Tests/WTF/RefPtr.cpp

/*
 * Copyright (C) 2013 Apple Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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#include "config.h"

#include "RefLogger.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>

namespace TestWebKitAPI {

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

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

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ASSERT_EQ(&a, &*ptr);
        ASSERT_EQ(&a.name, &ptr->name);
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr = &a;
        ASSERT_EQ(&a, ptr.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2(p1);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) ref(a) deref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = p1;
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) ref(a) deref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = WTFMove(p1);
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2(WTFMove(p1));
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<DerivedRefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = p1;
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) ref(a) deref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<DerivedRefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = WTFMove(p1);
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr = nullptr;
        ASSERT_EQ(nullptr, ptr.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr.release();
        ASSERT_EQ(nullptr, ptr.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());
}

TEST(WTF_RefPtr, AssignPassRefToRefPtr)
{
    DerivedRefLogger a("a");
    {
        Ref<RefLogger> passRef(a);
        RefPtr<RefLogger> ptr = WTFMove(passRef);
        ASSERT_EQ(&a, ptr.get());
        ptr.release();
        ASSERT_EQ(nullptr, ptr.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());
}

TEST(WTF_RefPtr, Adopt)
{
    DerivedRefLogger a("a");

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

    {
        RefPtr<RefLogger> ptr(adoptRef(&a));
        ASSERT_EQ(&a, ptr.get());
        ASSERT_EQ(&a, &*ptr);
        ASSERT_EQ(&a.name, &ptr->name);
    }
    ASSERT_STREQ("deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr = adoptRef(&a);
        ASSERT_EQ(&a, ptr.get());
    }
    ASSERT_STREQ("deref(a) ", takeLogStr().c_str());
}

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

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        log() << "| ";
        p1 = p2;
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(&b, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(b) | ref(b) deref(a) | deref(b) deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
        ptr = &b;
        ASSERT_EQ(&b, ptr.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) | ref(b) deref(a) | deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
        ptr = adoptRef(&b);
        ASSERT_EQ(&b, ptr.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) | deref(a) | deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        ptr = nullptr;
        ASSERT_EQ(nullptr, ptr.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        log() << "| ";
        p1 = WTFMove(p2);
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(nullptr, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(b) | deref(a) | deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<DerivedRefLogger> p2(&c);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&c, p2.get());
        log() << "| ";
        p1 = p2;
        ASSERT_EQ(&c, p1.get());
        ASSERT_EQ(&c, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(c) | ref(c) deref(a) | deref(c) deref(c) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
        ptr = &c;
        ASSERT_EQ(&c, ptr.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) | ref(c) deref(a) | deref(c) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
        ptr = adoptRef(&c);
        ASSERT_EQ(&c, ptr.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) | deref(a) | deref(c) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<DerivedRefLogger> p2(&c);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&c, p2.get());
        log() << "| ";
        p1 = WTFMove(p2);
        ASSERT_EQ(&c, p1.get());
        ASSERT_EQ(nullptr, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(c) | deref(a) | deref(c) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> ptr(&a);
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
        ptr = ptr;
        ASSERT_EQ(&a, ptr.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) | ref(a) deref(a) | deref(a) ", takeLogStr().c_str());

    {
        RefPtr<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());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());
}

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

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<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());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(b) | deref(a) deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<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());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(b) | deref(a) deref(b) ", takeLogStr().c_str());
}

TEST(WTF_RefPtr, ReleaseNonNull)
{
    RefLogger a("a");

    {
        RefPtr<RefLogger> refPtr = &a;
        RefPtr<RefLogger> ref = refPtr.releaseNonNull();
    }

    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());
}

TEST(WTF_RefPtr, Release)
{
    DerivedRefLogger a("a");
    RefLogger b("b");
    DerivedRefLogger c("c");

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = p1.release();
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1 = &a;
        RefPtr<RefLogger> p2(p1.release());
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<DerivedRefLogger> p1 = &a;
        RefPtr<RefLogger> p2 = p1.release();
        ASSERT_EQ(nullptr, p1.get());
        ASSERT_EQ(&a, p2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<RefLogger> p2(&b);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&b, p2.get());
        log() << "| ";
        p1 = p2.release();
        ASSERT_EQ(&b, p1.get());
        ASSERT_EQ(nullptr, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(b) | deref(a) | deref(b) ", takeLogStr().c_str());

    {
        RefPtr<RefLogger> p1(&a);
        RefPtr<DerivedRefLogger> p2(&c);
        ASSERT_EQ(&a, p1.get());
        ASSERT_EQ(&c, p2.get());
        log() << "| ";
        p1 = p2.release();
        ASSERT_EQ(&c, p1.get());
        ASSERT_EQ(nullptr, p2.get());
        log() << "| ";
    }
    ASSERT_STREQ("ref(a) ref(c) | deref(a) | deref(c) ", takeLogStr().c_str());
}

RefPtr<RefLogger> f1(RefLogger& logger)
{
    return RefPtr<RefLogger>(&logger);
}

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

    {
        f1(a);
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        auto ptr = f1(a);
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());
}

    
struct ConstRefCounted : RefCounted<ConstRefCounted> {
    static Ref<ConstRefCounted> create() { return adoptRef(*new ConstRefCounted); }
};

const ConstRefCounted& returnConstRefCountedRef()
{
    static NeverDestroyed<ConstRefCounted> instance;
    return instance.get();
}
ConstRefCounted& returnRefCountedRef()
{
    static NeverDestroyed<ConstRefCounted> instance;
    return instance.get();
}

TEST(WTF_RefPtr, Const)
{
    // This test passes if it compiles without an error.
    auto a = ConstRefCounted::create();
    Ref<const ConstRefCounted> b = WTFMove(a);
    RefPtr<const ConstRefCounted> c = b.ptr();
    Ref<const ConstRefCounted> d = returnConstRefCountedRef();
    RefPtr<const ConstRefCounted> e = &returnConstRefCountedRef();
    RefPtr<ConstRefCounted> f = ConstRefCounted::create();
    RefPtr<const ConstRefCounted> g = f;
    RefPtr<const ConstRefCounted> h(f);
    Ref<const ConstRefCounted> i(returnRefCountedRef());
}

} // namespace TestWebKitAPI