[Theory]
    [InlineData(30, TimeSpan.TicksPerSecond * 2)]
    [InlineData(60, TimeSpan.TicksPerSecond)]
    [InlineData(120, TimeSpan.TicksPerSecond / 2)]
    public void TestIntervalConversion(int bpm, long ticks)
    {
      var tempo = bpm.ToInterval();
      var interval = TimeSpan.FromTicks(ticks);
      Assert.Equal(interval, tempo);

      var reverse = interval.ToBpm();
      Assert.Equal(bpm, reverse);
    }