@Test(expected=IOException.class)
public void testStreamInterleavedOnlyLeft() throws Exception {

    ByteArrayOutputStream interleaved = new ByteArrayOutputStream();
    new SangerFastqWriter().write(interleaved, ImmutableList.of(left, left));
    Reader onlyLeftReader = new StringReader(interleaved.toString());
    streamInterleaved(onlyLeftReader, listener);
}