text: {
    var x = scale
      .scaleUtc()
      .domain([
        date.utc(2011, 0, 1, 14, 28, 27),
        date.utc(2011, 0, 2, 1, 34, 12)
      ]);
    test.deepEqual(x.ticks(4), [
      date.utc(2011, 0, 1, 15, 0),
      date.utc(2011, 0, 1, 18, 0),
      date.utc(2011, 0, 1, 21, 0),
      date.utc(2011, 0, 2, 0, 0)
    ]);
    test.end();
  }
  