Source/core/testing/DummyPageHolder.h

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#ifndef DummyPageHolder_h
#define DummyPageHolder_h

#include "core/loader/EmptyClients.h"
#include "core/page/Page.h"
#include "platform/geometry/IntSize.h"
#include "platform/heap/Handle.h"
#include "wtf/FastAllocBase.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"

namespace WebCore {

class Document;
class LocalFrame;
class FrameView;
class IntSize;

// Creates a dummy Page, LocalFrame, and FrameView whose clients are all no-op.
//
// This class can be used when you write unit tests for components which do not work correctly without renderers.
// To make sure the renderers are created, you need to call |frameView().layout()| after you add nodes into
// |document()|.
//
// Since DummyPageHolder stores empty clients in it, it must outlive the Page, LocalFrame, FrameView and any other objects
// created by it. DummyPageHolder's destructor ensures this condition by checking remaining references to the LocalFrame.

class DummyPageHolder {
    WTF_MAKE_NONCOPYABLE(DummyPageHolder);
    WTF_MAKE_FAST_ALLOCATED;
public:
    static PassOwnPtr<DummyPageHolder> create(const IntSize& initialViewSize = IntSize());
    ~DummyPageHolder();

    Page& page() const;
    LocalFrame& frame() const;
    FrameView& frameView() const;
    Document& document() const;

private:
    explicit DummyPageHolder(const IntSize& initialViewSize);

    OwnPtrWillBePersistent<Page> m_page;
    RefPtr<LocalFrame> m_frame;

    Page::PageClients m_pageClients;
    EmptyFrameLoaderClient m_frameLoaderClient;
};

} // namespace WebCore

#endif // DummyPageHolder_h