-

      contig: range.contig,
      start: range.start(),
      stop: range.stop()
    });
  });

  it('should fetch nearby features', function(done) {
    this.timeout(5000);
    var source = getTestSource();

    // Requests are for 'chr20', while the canonical name is just '20'.
    var range       = new ContigInterval('chr20', 31512050, 31512150),
        rangeBefore = new ContigInterval('chr20', 31512000, 31512050),
        rangeAfter  = new ContigInterval('chr20', 31512150, 31512199);

    var reads = source.getAlignmentsInRange(range);
    expect(reads).to.deep.equal([]);

    // Fetching [50, 150] should cache [0, 200]
    source.on('newdata', () => {
      var reads = source.getAlignmentsInRange(range);
      expect(reads).to.have.length(19);
      expect(reads[0].toString()).to.equal('20:31511951-31512051');
      expect(reads[18].toString()).to.equal('20:31512146-31512246');