public void testSeasonalTicketForAmountWithChange()
{
Assert.AreEqual(false, this.testCard.isSeasonalTicketValid());
double change = testCard.buySeasonalTicketForAmount(100.50);
Assert.AreEqual(true, this.testCard.isSeasonalTicketValid());
Assert.AreEqual(0.50, change, 0.05);
}