public void GivenDistanceAndTime_WhenToCalculateForMultipleFare_ShouldReturnAverageFare()
 {
     Ride[] rides =
     {
         new Ride(2.0, 5),
         new Ride(0.1, 1)
     };
     Assert.AreEqual(15, invoiceGenerator.GenerateAverageFare(rides));
 }