/*
 * Copyright (C) 2009-2010 Institute for Computational Biomedicine,
 *                         Weill Medical College of Cornell University
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */

package edu.cornell.med.icb.goby.alignments;

import edu.cornell.med.icb.goby.alignments.filters.PercentMismatchesQualityFilter;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;

/**
 * @author Fabien Campagne
 *         Date: May 6, 2009
 *         Time: 11:44:09 AM
 */
public class TestAlignmentFilters {
    @Test
    public void testFewMismatchesFilter() {

        Alignments.AlignmentEntry.Builder builder;
        Alignments.AlignmentEntry entry;

        builder = buildMinimalEntry();

        builder.setNumberOfIndels(0);
        builder.setNumberOfMismatches(0);
        builder.setQueryLength(40);
        entry = builder.build();

        PercentMismatchesQualityFilter filter = new PercentMismatchesQualityFilter();
        assertTrue("entry must be kept", filter.keepEntry(100, entry));

        builder = buildMinimalEntry();
        builder.setNumberOfIndels(2);
        builder.setNumberOfMismatches(3);
        builder.setQueryAlignedLength(1);

        entry = builder.build();

        filter = new PercentMismatchesQualityFilter();
        assertFalse("entry must be removed", filter.keepEntry(1, entry));
        assertFalse("entry must be removed", filter.keepEntry(10, entry));
        assertTrue("entry must be kept", filter.keepEntry(100, entry));
        assertTrue("entry must be kept", filter.keepEntry(101, entry));

        builder = buildMinimalEntry();
        builder.setNumberOfIndels(2);
        builder.setNumberOfMismatches(3);
        entry = builder.build();

        filter = new PercentMismatchesQualityFilter();
        filter.setParameters("threshold=0.02");         // 2% differences allowed.
        assertFalse("entry must be removed", filter.keepEntry(1, entry));
        assertFalse("entry must be removed", filter.keepEntry(10, entry));
        assertFalse("entry must be removed", filter.keepEntry(100, entry));
        assertFalse("entry must be removed", filter.keepEntry(101, entry));
        assertTrue("entry must be kept", filter.keepEntry(250, entry));
        assertTrue("entry must be kept", filter.keepEntry(251, entry));
    }

    private Alignments.AlignmentEntry.Builder buildMinimalEntry() {
        final Alignments.AlignmentEntry.Builder builder;
        builder = Alignments.AlignmentEntry.newBuilder();

        builder.setQueryIndex(0);
        builder.setTargetIndex(0);
        builder.setPosition(10);
        builder.setQueryAlignedLength(100);
        builder.setMatchingReverseStrand(false);
        builder.setQueryLength(30);
        return builder;
    }
}
