Tools/TestWebKitAPI/Tests/WTF/Ref.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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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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#include "config.h"

#include "RefLogger.h"
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>

namespace TestWebKitAPI {

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

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

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

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

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

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

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

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

static Ref<RefLogger> passWithRef(Ref<RefLogger>&& reference)
{
    return WTFMove(reference);
}

static RefPtr<RefLogger> passWithPassRefPtr(PassRefPtr<RefLogger> reference)
{
    return reference;
}

TEST(WTF_Ref, ReturnValue)
{
    DerivedRefLogger a("a");
    RefLogger b("b");
    DerivedRefLogger c("c");

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

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

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

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

    {
        RefPtr<DerivedRefLogger> ptr(&a);
        RefPtr<RefLogger> ptr2(WTFMove(ptr));
        ASSERT_EQ(nullptr, ptr.get());
        ASSERT_EQ(&a, ptr2.get());
    }
    ASSERT_STREQ("ref(a) deref(a) ", takeLogStr().c_str());

    {
        Ref<DerivedRefLogger> derivedReference(a);
        Ref<RefLogger> baseReference(passWithRef(derivedReference.copyRef()));
        ASSERT_EQ(&a, derivedReference.ptr());
        ASSERT_EQ(&a, baseReference.ptr());
    }
    ASSERT_STREQ("ref(a) ref(a) deref(a) deref(a) ", takeLogStr().c_str());
}

} // namespace TestWebKitAPI