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/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 * 

 * This program 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 General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.fmap.dal.feature.paging.impl;

import junit.framework.TestCase;

/**

 * Unit tests for the {@link AbstractPagingCalculator} class.

 * 

 * @author 2010- C?sar Ordi?ana - gvSIG team

 */

public class AbstractPagingCalculatorTest extends TestCase {

        private AbstractPagingCalculator calculator;

        private static final long SIZE = 22;

        private static final int MAX_PAGE_SIZE = 4;

        protected void setUp() throws Exception {

                super.setUp();

                calculator = createCalculator();

        }

        protected AbstractPagingCalculator createCalculator() {

                return new TestPagingCalculator(MAX_PAGE_SIZE, SIZE);

        }

        /**

         * Test method for

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#getMaxPageSize()}

         * and

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#setMaxPageSize(int)}

         * .

         */

        public void testMaxPageSize() {

                assertEquals(MAX_PAGE_SIZE, calculator.getMaxPageSize());

                calculator.setMaxPageSize(100);

                assertEquals(100, calculator.getMaxPageSize());

                try {

                        calculator.setMaxPageSize(-10);

                        fail("Calculator accepts a negative max page size value");

                } catch (Exception ex) {

                        // works as expected

                }

        }

        /**

         * Test method for

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#getCurrentPage()}

         * and

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#setCurrentPage(long)}

         * .

         */

        public void testCurrentPage() {

                assertEquals(0, calculator.getCurrentPage());

                long page = calculator.getNumPages() - 1;

                calculator.setCurrentPage(page);

                assertEquals(page, calculator.getCurrentPage());

                try {

                        calculator.setCurrentPage(-10);

                        fail("Calculator accepts a negative current page value");

                } catch (Exception ex) {

                        // works as expected

                }

        }

        /**

         * Test method for

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#getInitialIndex()}

         * .

         */

        public void testGetInitialIndex() {

                calculator.setCurrentPage(0l);

                assertEquals(0, calculator.getInitialIndex());

                calculator.setCurrentPage(2);

                assertEquals(2 * calculator.getMaxPageSize(),

                                calculator.getInitialIndex());

        }

        /**

         * Test method for

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#getNumPages()}

         * .

         */

        public void testGetNumPages() {

                assertEquals(6, calculator.getNumPages());

        }

        /**

         * Test method for

         * {@link org.gvsig.fmap.dal.feature.paging.impl.AbstractPagingCalculator#getCurrentPageSize()}

         * .

         */

        public void testGetCurrentPageSize() {

                for (int i = 0; i < calculator.getNumPages() - 1; i++) {

                        calculator.setCurrentPage(i);

                        assertEquals(MAX_PAGE_SIZE, calculator.getCurrentPageSize());                        

                }

                calculator.setCurrentPage(calculator.getNumPages() - 1);

                assertEquals(SIZE % MAX_PAGE_SIZE, calculator.getCurrentPageSize());

        }

        private class TestPagingCalculator extends AbstractPagingCalculator {

                private final long size;

                public TestPagingCalculator(int maxPageSize, long size) {

                        super(maxPageSize);

                        this.size = size;

                }

                public TestPagingCalculator(int maxPageSize, long currentPage, long size) {

                        super(maxPageSize, currentPage);

                        this.size = size;

                }

                public long getTotalSize() {

                        return size;

                }

        }

}