/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "core/fetch/RawResource.h"

#include "core/fetch/ImageResourceClient.h"
#include "core/fetch/MemoryCache.h"
#include "core/fetch/MockImageResourceClient.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/fetch/ResourcePtr.h"
#include "core/loader/DocumentLoader.h"
#include "core/testing/DummyPageHolder.h"
#include "core/testing/UnitTestHelpers.h"
#include "platform/SharedBuffer.h"
#include "public/platform/Platform.h"
#include "public/platform/WebURL.h"
#include "public/platform/WebURLResponse.h"
#include "public/platform/WebUnitTestSupport.h"

using namespace blink;

namespace blink {

TEST(RawResourceTest, DontIgnoreAcceptForCacheReuse)
{
    ResourceRequest jpegRequest;
    jpegRequest.setHTTPAccept("image/jpeg");

    ResourcePtr<RawResource> jpegResource(new RawResource(jpegRequest, Resource::Raw));

    ResourceRequest pngRequest;
    pngRequest.setHTTPAccept("image/png");

    ASSERT_FALSE(jpegResource->canReuse(pngRequest));
}

TEST(RawResourceTest, RevalidationSucceeded)
{
    // Create two RawResources and set one to revalidate the other.
    RawResource* oldResourcePointer = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
    RawResource* newResourcePointer = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
    newResourcePointer->setResourceToRevalidate(oldResourcePointer);
    ResourcePtr<Resource> oldResource = oldResourcePointer;
    ResourcePtr<Resource> newResource = newResourcePointer;
    memoryCache()->add(oldResource.get());
    memoryCache()->remove(oldResource.get());
    memoryCache()->add(newResource.get());

    // Simulate a successful revalidation.
    // The revalidated resource (oldResource) should now be in the cache, newResource
    // should have been sliently switched to point to the revalidated resource, and
    // we shouldn't hit any ASSERTs.
    ResourceResponse response;
    response.setHTTPStatusCode(304);
    newResource->responseReceived(response);
    EXPECT_EQ(memoryCache()->resourceForURL(KURL(ParsedURLString, "data:text/html,")), oldResource.get());
    EXPECT_EQ(oldResource.get(), newResource.get());
    EXPECT_NE(newResource.get(), newResourcePointer);
}

class DummyClient : public RawResourceClient {
public:
    DummyClient() : m_called(false) { }
    virtual ~DummyClient() { }

    // ResourceClient implementation.
    virtual void notifyFinished(Resource* resource)
    {
        m_called = true;
    }

    bool called() { return m_called; }
private:
    bool m_called;
};

// This client adds another client when notified.
class AddingClient : public RawResourceClient {
public:
    AddingClient(DummyClient* client, Resource* resource)
        : m_dummyClient(client)
        , m_resource(resource)
        , m_removeClientTimer(this, &AddingClient::removeClient) { }

    virtual ~AddingClient() { }

    // ResourceClient implementation.
    virtual void notifyFinished(Resource* resource)
    {
        // First schedule an asynchronous task to remove the client.
        // We do not expect the client to be called.
        m_removeClientTimer.startOneShot(0, FROM_HERE);
        resource->addClient(m_dummyClient);
    }
    void removeClient(Timer<AddingClient>* timer)
    {
        m_resource->removeClient(m_dummyClient);
    }
private:
    DummyClient* m_dummyClient;
    Resource* m_resource;
    Timer<AddingClient> m_removeClientTimer;
};

TEST(RawResourceTest, AddClientDuringCallback)
{
    ResourcePtr<Resource> raw = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
    raw->setLoading(false);

    // Create a non-null response.
    ResourceResponse response = raw->response();
    response.setURL(KURL(ParsedURLString, "http://600.613/"));
    raw->setResponse(response);
    EXPECT_FALSE(raw->response().isNull());

    OwnPtr<DummyClient> dummyClient = adoptPtr(new DummyClient());
    OwnPtr<AddingClient> addingClient = adoptPtr(new AddingClient(dummyClient.get(), raw.get()));
    raw->addClient(addingClient.get());
    testing::runPendingTasks();
    raw->removeClient(addingClient.get());
    EXPECT_FALSE(dummyClient->called());
    EXPECT_FALSE(raw->hasClients());
}

// This client removes another client when notified.
class RemovingClient : public RawResourceClient {
public:
    RemovingClient(DummyClient* client)
        : m_dummyClient(client) { }

    virtual ~RemovingClient() { }

    // ResourceClient implementation.
    virtual void notifyFinished(Resource* resource)
    {
        resource->removeClient(m_dummyClient);
        resource->removeClient(this);
    }
private:
    DummyClient* m_dummyClient;
};

TEST(RawResourceTest, RemoveClientDuringCallback)
{
    ResourcePtr<Resource> raw = new RawResource(ResourceRequest("data:text/html,"), Resource::Raw);
    raw->setLoading(false);

    // Create a non-null response.
    ResourceResponse response = raw->response();
    response.setURL(KURL(ParsedURLString, "http://600.613/"));
    raw->setResponse(response);
    EXPECT_FALSE(raw->response().isNull());

    OwnPtr<DummyClient> dummyClient = adoptPtr(new DummyClient());
    OwnPtr<RemovingClient> removingClient = adoptPtr(new RemovingClient(dummyClient.get()));
    raw->addClient(dummyClient.get());
    raw->addClient(removingClient.get());
    testing::runPendingTasks();
    EXPECT_FALSE(raw->hasClients());
}

} // namespace blink
