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package org.broad.igv.feature.genome;
import org.broad.igv.AbstractHeadlessTest;
import org.broad.igv.util.TestUtils;
import org.junit.Before;
import org.junit.Test;
import java.io.*;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.Set;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertTrue;
/**
* Created by IntelliJ IDEA.
* User: jrobinso
* Date: 8/7/11
* Time: 7:41 PM
* To change this template use File | Settings | File Templates.
*/
public class FastaIndexTest extends AbstractHeadlessTest {
static String indexPath = TestUtils.DATA_DIR + "fasta/ci2_test.fa.fai";
private FastaIndex index;
public static void main(String[] args) throws IOException {
long numContigs = (long) 1.4e6;
String outfilepath = TestUtils.DATA_DIR + numContigs + "contigs.fasta";
genManyContigFasta(outfilepath, 80, numContigs);
}
/**
* Generate a fasta file with a large number of contigs
* Each will be only 1 line
*
* @param outfilepath
* @param linelen
* @param numContigs
*/
static void genManyContigFasta(String outfilepath, int linelen, long numContigs) throws IOException {
char[] chars = {'A', 'C', 'G', 'T'};
long seed = 3458056478l;
Random rand = new Random(seed);
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outfilepath)));
PrintWriter writer = new PrintWriter(out);
String line;
for (int num = 0; num < numContigs; num++) {
writer.print(">contig");
writer.println(num);
line = "";
for (int ch = 0; ch < linelen; ch++) {
line += chars[rand.nextInt(chars.length)];
}
writer.println(line);
}
writer.flush();
writer.close();
}
@Before
public void setUp() throws IOException {
index = new FastaIndex(indexPath);
}
@Test
public void testGetContigs() throws Exception {
List expectedContigs = Arrays.asList("chr01p", "chr02q", "chr03q");
Set<String> contigs = index.getSequenceNames();
assertEquals(expectedContigs.size(), contigs.size());
for (Object exp : expectedContigs) {
assertTrue(contigs.contains(exp));
}
}
@Test
public void testGetIndexEntry() throws Exception {
//5803340 14565324 50 51
FastaIndex.FastaSequenceIndexEntry entry = index.getIndexEntry("chr03q");
assertEquals("Size", 5803340, entry.getSize());
assertEquals("Position", 14565324, entry.getPosition());
assertEquals("basesPerLine", 50, entry.getBasesPerLine());
assertEquals("bytesPerLine", 51, entry.getBytesPerLine());
}
}