/** 
 * @file llimageworker_test.cpp
 * @author Merov Linden
 * @date 2009-04-28
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

// Precompiled header: almost always required for newview cpp files
#include "linden_common.h"
// Class to test 
#include "../llimageworker.h"
// For timer class
#include "../llcommon/lltimer.h"
// for lltrace class
#include "../llcommon/lltrace.h"
// Tut header
#include "../test/lltut.h"

// -------------------------------------------------------------------------------------------
// Stubbing: Declarations required to link and run the class being tested
// Notes: 
// * Add here stubbed implementation of the few classes and methods used in the class to be tested
// * Add as little as possible (let the link errors guide you)
// * Do not make any assumption as to how those classes or methods work (i.e. don't copy/paste code)
// * A simulator for a class can be implemented here. Please comment and document thoroughly.

LLImageBase::LLImageBase() 
: mData(NULL),
mDataSize(0),
mWidth(0),
mHeight(0),
mComponents(0),
mBadBufferAllocation(false),
mAllowOverSize(false)
{
}
LLImageBase::~LLImageBase() {}
void LLImageBase::dump() { }
void LLImageBase::sanityCheck() { }
void LLImageBase::deleteData() { }
U8* LLImageBase::allocateData(S32 size) { return NULL; }
U8* LLImageBase::reallocateData(S32 size) { return NULL; }

LLImageRaw::LLImageRaw(U16 width, U16 height, S8 components) { }
LLImageRaw::~LLImageRaw() { }
void LLImageRaw::deleteData() { }
U8* LLImageRaw::allocateData(S32 size) { return NULL; }
U8* LLImageRaw::reallocateData(S32 size) { return NULL; }
const U8* LLImageBase::getData() const { return NULL; }
U8* LLImageBase::getData() { return NULL; }

// End Stubbing
// -------------------------------------------------------------------------------------------

// -------------------------------------------------------------------------------------------
// TUT
// -------------------------------------------------------------------------------------------

namespace tut
{
	// Test wrapper declarations

	// Note: We derive the responder class for 2 reasons:
	// 1. It's a pure virtual class and we can't compile without completed() being implemented
	// 2. We actually need a responder to test that the thread work test completed
	// We implement this making no assumption on what's done in the thread or worker
	// though, just that the responder's completed() method is called in the end.
	// Note on responders: responders are ref counted and *will* be deleted by the request they are 
	// attached to when the queued request is deleted. The recommended way of using them is to 
	// create them when creating a request, put a callback method in completed() and not rely on 
	// anything to survive in the responder object once completed() has been called. Let the request
	// do the deletion and clean up itself.
	class responder_test : public LLImageDecodeThread::Responder
	{
		public:
			responder_test(bool* res)
			{ 
				done = res;
				*done = false;
			}
			virtual void completed(bool success, LLImageRaw* raw, LLImageRaw* aux)
			{
				*done = true;
			}
		private:
			// This is what can be thought of as the minimal implementation of a responder
			// Done will be switched to true when completed() is called and can be tested
			// outside the responder. A better way of doing this is to store a callback here.
			bool* done;
	};

	// Test wrapper declaration : decode thread
	struct imagedecodethread_test
	{
		// Instance to be tested
		LLImageDecodeThread* mThread;
		// Constructor and destructor of the test wrapper
		imagedecodethread_test()
		{
			mThread = NULL;
		}
		~imagedecodethread_test()
		{
			delete mThread;
		}
	};

	// Tut templating thingamagic: test group, object and test instance
	typedef test_group<imagedecodethread_test> imagedecodethread_t;
	typedef imagedecodethread_t::object imagedecodethread_object_t;
	tut::imagedecodethread_t tut_imagedecodethread("LLImageDecodeThread");

	// ---------------------------------------------------------------------------------------
	// Test functions
	// Notes:
	// * Test as many as you possibly can without requiring a full blown simulation of everything
	// * The tests are executed in sequence so the test instance state may change between calls
	// * Remember that you cannot test private methods with tut
	// ---------------------------------------------------------------------------------------

	// ---------------------------------------------------------------------------------------
	// Test the LLImageDecodeThread interface
	// ---------------------------------------------------------------------------------------

	template<> template<>
	void imagedecodethread_object_t::test<1>()
	{
		// Test a *threaded* instance of the class
		mThread = new LLImageDecodeThread(true);
		ensure("LLImageDecodeThread: threaded constructor failed", mThread != NULL);
		// Insert something in the queue
		bool done = false;
		LLImageDecodeThread::handle_t decodeHandle = mThread->decodeImage(NULL, 0, false, new responder_test(&done));
		// Verifies we get back a valid handle
		ensure("LLImageDecodeThread:  threaded decodeImage(), returned handle is null", decodeHandle != 0);
		// Wait till the thread has time to handle the work order (though it doesn't do much per work order...)
		const U32 INCREMENT_TIME = 500;				// 500 milliseconds
		const U32 MAX_TIME = 20 * INCREMENT_TIME;	// Do the loop 20 times max, i.e. wait 10 seconds but no more
		U32 total_time = 0;
		while ((done == false) && (total_time < MAX_TIME))
		{
			ms_sleep(INCREMENT_TIME);
			total_time += INCREMENT_TIME;
		}
		// Verifies that the responder has now been called
		ensure("LLImageDecodeThread: threaded work unit not processed", done == true);
	}
}