public void CropTest()
{
const int WHEAT_RATE = 1;
const int CORN_RATE = 2;
const int SOYBEAN_RATE = 3;
var wheat = new Crop(CropType.Wheat);
var corn = new Crop(CropType.Corn);
var soybean = new Crop(CropType.Soybean);
Assert.AreEqual("Wheat", wheat.CropType.ToString());
Assert.AreEqual("Corn", corn.CropType.ToString());
Assert.AreEqual("Soybean", soybean.CropType.ToString());
Assert.AreEqual(WHEAT_RATE, wheat.GetGrowthRate());
Assert.AreEqual(CORN_RATE, corn.GetGrowthRate());
Assert.AreEqual(SOYBEAN_RATE, soybean.GetGrowthRate());
Assert.AreEqual(wheat.GetHeight(), 0);
Assert.AreEqual(corn.GetHeight(), 0);
Assert.AreEqual(soybean.GetHeight(), 0);
DateTime plantedTime = DateTime.Now.AddMinutes(-100);
wheat.DatePlanted = plantedTime;
corn.DatePlanted = plantedTime;
soybean.DatePlanted = plantedTime;
var wheatHeight = wheat.GetHeight();
var cornHeight = corn.GetHeight();
var soybeanHeight = soybean.GetHeight();
Assert.AreEqual(true, wheatHeight >= 98 && wheatHeight <= 102); // withn +/- 2%
Assert.AreEqual(true, cornHeight >= 196 && cornHeight <= 204); // withn +/- 2%
Assert.AreEqual(true, soybeanHeight >= 294 && soybeanHeight <= 306); // withn +/- 2%
}