@Test
public void testInterleaveFastqUnpaired() throws Exception {

    copyResource("unpaired_R1.fq.gz", firstFastqFile);
    copyResource("unpaired_R2.fq.gz", secondFastqFile);
    new InterleaveFastq(firstFastqFile, secondFastqFile, pairedFile, unpairedFile).call();
    assertEquals(4, countFastq(pairedFile));
    assertEquals(2, countFastq(unpairedFile));
}