Source/WebKit/chromium/tests/MemoryInstrumentationTest.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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#include "config.h"

#include "CachedImage.h"
#include "MemoryInstrumentationImpl.h"
#include <gtest/gtest.h>
#include <wtf/MemoryInstrumentation.h>
#include <wtf/OwnPtr.h>

using namespace WebCore;

using WTF::MemoryObjectInfo;
using WTF::MemoryClassInfo;
using WTF::MemoryObjectType;

namespace {

MemoryObjectType TestType = "TestType";

class ImageObserverTestHelper {
public:
    ImageObserverTestHelper()
        : m_cachedImage(adoptPtr(new CachedImage(0)))
        , m_imageOberver(m_cachedImage.get())
    {
    }
    void reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
    {
        MemoryClassInfo info(memoryObjectInfo, this, TestType);
        info.addMember(m_cachedImage);
        info.addMember(m_imageOberver);
    }

    OwnPtr<CachedImage> m_cachedImage;
    ImageObserver* m_imageOberver;
};

TEST(MemoryInstrumentationTest, ImageObserver)
{
    ImageObserverTestHelper helper;

    class TestClient : public MemoryInstrumentationClientImpl {
    public:
        TestClient(const void* expectedPointer, const void* unexpectedPointer)
            : m_expectedPointer(expectedPointer)
            , m_unexpectedPointer(unexpectedPointer)
            , m_expectedPointerFound(false)
        {
            EXPECT_NE(expectedPointer, unexpectedPointer);
        }
        virtual void countObjectSize(const void* pointer, MemoryObjectType type, size_t size) OVERRIDE
        {
            EXPECT_NE(m_unexpectedPointer, pointer);
            if (m_expectedPointer == pointer)
                m_expectedPointerFound = true;
            MemoryInstrumentationClientImpl::countObjectSize(pointer, type, size);
        }

        bool expectedPointerFound() { return m_expectedPointerFound; }

    private:
        const void* m_expectedPointer;
        const void* m_unexpectedPointer;
        bool m_expectedPointerFound;
    } client(helper.m_cachedImage.get(), helper.m_imageOberver);
    MemoryInstrumentationImpl instrumentation(&client);
    instrumentation.addRootObject(helper);
    EXPECT_TRUE(client.expectedPointerFound());
    EXPECT_LE(sizeof(CachedImage), client.reportedSizeForAllTypes());
    EXPECT_LE(1u, client.totalCountedObjects());
}


} // namespace