Application: gvSIG desktop » Library: org.gvsig.tools

/* 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.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2010 {}  {{Task}}

 */

package org.gvsig.tools.dynobject;

import org.gvsig.tools.junit.AbstractLibraryAutoInitTestCase;

/**

 * Tests for the {@link DynObjectPagingHelper} interface.

 * 

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

 */

public abstract class DynObjectPagingHelperTest extends

                AbstractLibraryAutoInitTestCase {

        private DynObjectPagingHelper helper;

        protected void doSetUp() throws Exception {

                helper = createDynObjectPagingHelper();

        }

        /**

         * Test method for the max page size setting.

         */

        public void testMaxPageSize() throws Exception {

                helper.setMaxPageSize(2);

                helper.setCurrentPage(0);

                long numPages = helper.getNumPages();

                if (numPages == 0) {

                        fail("The provided helper can't have 0 pages, "

                                        + "please provide one with some data for the test");

                }

                for (long i = numPages; i < numPages - 1; i++) {

                        assertEquals("Number of elements of page " + i

                                        + " is not the same as the maximum page size", numPages,

                                        helper.getCurrentPageDynObjects().length);

                        helper.setCurrentPage(i + 1);

                }

                assertTrue(

                                "Last page is not less than or equal to the maximum page size",

                                numPages >= helper.getCurrentPageDynObjects().length);

        }

        /**

         * Test method for

         * {@link org.gvsig.tools.dynobject.DynObjectPagingHelper#getNumPages()}.

         */

        public void testGetNumPages() throws Exception {

                long numDOs = helper.getTotalSize();

                long pageSize = helper.getMaxPageSize();

                long numPages = (long) Math.ceil(numDOs / pageSize);

                assertEquals(numPages, helper.getNumPages());

                pageSize = 2;

                helper.setMaxPageSize((int) pageSize);

                numPages = (long) Math.ceil(numDOs / pageSize);

                assertEquals(numPages, helper.getNumPages());

        }

        /**

         * Test method for

         * {@link org.gvsig.tools.dynobject.DynObjectPagingHelper#setCurrentPage(long)}

         * .

         */

        public void testSetCurrentPage() throws Exception {

                try {

                        helper.setCurrentPage(helper.getNumPages() + 1);

                        fail("Helper allows to set a page which does not exist");

                } catch (Exception e) {

                        // Works as excepted

                }

                try {

                        helper.setCurrentPage(-1);

                        fail("Helper allows to set a negative page");

                } catch (Exception e) {

                        // Works as excepted

                }

        }

        /**

         * Test method for

         * {@link org.gvsig.tools.dynobject.DynObjectPagingHelper#getCurrentPageDynObjects()}

         * .

         */

        public void testGetCurrentPageDynObjects() throws Exception {

                helper.setMaxPageSize(2);

                long numPages = helper.getNumPages();

                if (numPages < 2) {

                        fail("The provided helper can't have 0 or 1 page, "

                                        + "please provide one with some more data for the test");

                }

                helper.setCurrentPage(0);

                DynObject[] values = helper.getCurrentPageDynObjects();

                assertTrue(values != null && values.length == 2);

        }

        protected abstract DynObjectPagingHelper createDynObjectPagingHelper()

                        throws Exception;

}