/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <sal/types.h>
#include <cppunit/TestAssert.h>
#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>

#include <o3tl/vector_pool.hxx>

using namespace ::o3tl;

class vector_pool_test : public CppUnit::TestFixture
{
public:
    void testPoolBasics()
    {
        vector_pool<int> aPool;

        std::ptrdiff_t nIdx1 = aPool.alloc();
        std::ptrdiff_t nIdx2 = aPool.alloc();
        std::ptrdiff_t nIdx3 = aPool.alloc();

        CPPUNIT_ASSERT_MESSAGE("allocator idx order 1", nIdx1 < nIdx2 );
        CPPUNIT_ASSERT_MESSAGE("allocator idx order 2", nIdx2 < nIdx3 );

        aPool.free(nIdx2);
        aPool.free(nIdx3);

        nIdx2 = aPool.alloc();
        nIdx3 = aPool.alloc();

        CPPUNIT_ASSERT_MESSAGE("allocator idx order 1 after fragmentation", nIdx1 < nIdx3 );
        CPPUNIT_ASSERT_MESSAGE("allocator idx order 2 after fragmentation", nIdx3 < nIdx2 );
    }

    void testPoolValueSemantics()
    {
        vector_pool<int> aPool;

        std::ptrdiff_t nIdx1 = aPool.store(0);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("allocator value semantics 1", 0, aPool.get(nIdx1) );

        std::ptrdiff_t nIdx2 = aPool.store(1);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("allocator value semantics 2", 1, aPool.get(nIdx2) );

        std::ptrdiff_t nIdx3 = aPool.store(2);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("allocator value semantics 3", 2, aPool.get(nIdx3) );

        aPool.free(nIdx2);
        aPool.free(nIdx3);

        nIdx2 = aPool.store(1);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("allocator value semantics 2 after fragmentation", 1, aPool.get(nIdx2) );

        nIdx3 = aPool.store(2);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("allocator value semantics 3 after fragmentation", 2, aPool.get(nIdx3) );
    }

    // Change the following lines only, if you add, remove or rename
    // member functions of the current class,
    // because these macros are need by auto register mechanism.

    CPPUNIT_TEST_SUITE(vector_pool_test);
    CPPUNIT_TEST(testPoolBasics);
    CPPUNIT_TEST(testPoolValueSemantics);
    CPPUNIT_TEST_SUITE_END();
};


CPPUNIT_TEST_SUITE_REGISTRATION(vector_pool_test);

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