/*
* The MIT License
*
* Copyright (c) 2016 Nils Homer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
package picard.vcf;
import htsjdk.samtools.SAMFileHeader;
import htsjdk.samtools.SAMSequenceDictionary;
import htsjdk.samtools.util.Interval;
import htsjdk.samtools.util.IntervalList;
import htsjdk.variant.variantcontext.VariantContext;
import htsjdk.variant.vcf.VCFFileReader;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.io.File;
import java.util.Iterator;
/**
* Tests for ByIntervalListVariantContextIterator.
*/
public class ByIntervalListVariantContextIteratorTest {
private static final File TEST_DATA_PATH = new File("testdata/picard/vcf/");
private static final File CEU_TRIOS_SNPS_VCF = new File(TEST_DATA_PATH, "CEUTrio-snps.vcf");
private static final File CEU_TRIOS_INDELS_VCF = new File(TEST_DATA_PATH, "CEUTrio-indels.vcf");
private static final File EMPTY_VCF = new File(TEST_DATA_PATH, "empty.vcf");
private final SAMFileHeader header;
private final SAMSequenceDictionary dict;
public ByIntervalListVariantContextIteratorTest() {
this.header = getSAMFileHeader();
this.dict = header.getSequenceDictionary();
}
private VCFFileReader getReader(final File file) {
return new VCFFileReader(file, true);
}
private SAMFileHeader getSAMFileHeader() {
final VCFFileReader reader = getReader(CEU_TRIOS_SNPS_VCF);
final SAMSequenceDictionary dict = reader.getFileHeader().getSequenceDictionary();
reader.close();
final SAMFileHeader header = new SAMFileHeader();
header.setSequenceDictionary(dict);
return header;
}
@Test
public void testEmptyIntervalList() {
final IntervalList intervalList = new IntervalList(header);
final VCFFileReader reader = getReader(CEU_TRIOS_SNPS_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
@Test
public void testNoVariants() {
final IntervalList intervalList = new IntervalList(header);
intervalList.add(new Interval(this.dict.getSequence(0).getSequenceName(), 1, 100));
final VCFFileReader reader = getReader(EMPTY_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
@Test
public void testSimpleOverlap() {
final IntervalList intervalList = new IntervalList(header);
intervalList.add(new Interval("2", 167166899, 167166899));
final VCFFileReader reader = getReader(CEU_TRIOS_SNPS_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertTrue(iterator.hasNext());
final VariantContext ctx = iterator.next();
Assert.assertEquals(ctx.getStart(), 167166899);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
@Test
public void testNoOverlapDifferentContig() {
final IntervalList intervalList = new IntervalList(header);
intervalList.add(new Interval("3", 167166899, 167166899));
final VCFFileReader reader = getReader(CEU_TRIOS_SNPS_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
@Test
public void testSimpleEnclosing() {
final IntervalList intervalList = new IntervalList(header);
intervalList.add(new Interval("12", 68921962, 68921962)); // deletion spans this
final VCFFileReader reader = getReader(CEU_TRIOS_INDELS_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertTrue(iterator.hasNext());
final VariantContext ctx = iterator.next();
Assert.assertEquals(ctx.getStart(), 68921960);
Assert.assertEquals(ctx.getEnd(), 68921966);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
@Test
public void testVariantOverlappingMultipleIntervalsIsReturnedOnlyOnce() {
final IntervalList intervalList = new IntervalList(header);
intervalList.add(new Interval("12", 68921962, 68921962)); // deletion spans this
intervalList.add(new Interval("12", 68921964, 68921964)); // deletion spans this
final VCFFileReader reader = getReader(CEU_TRIOS_INDELS_VCF);
final Iterator<VariantContext> iterator = new ByIntervalListVariantContextIterator(reader, intervalList);
Assert.assertTrue(iterator.hasNext());
final VariantContext ctx = iterator.next();
Assert.assertEquals(ctx.getStart(), 68921960);
Assert.assertEquals(ctx.getEnd(), 68921966);
Assert.assertFalse(iterator.hasNext());
reader.close();
}
}