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diff --git a/Tools/TestWebKitAPI/Tests/WTF/Ref.cpp b/Tools/TestWebKitAPI/Tests/WTF/Ref.cpp
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+++ b/Tools/TestWebKitAPI/Tests/WTF/Ref.cpp
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+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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