public void PrecipChangeTest(int startValue, int changeValue, int expectedValue)
{
var cell = new WeatherCell(1)
{
Precipitation = startValue
};
cell.ChangePrecip(changeValue);
Assert.That(cell.Precipitation, Is.EqualTo(expectedValue));
}
private static void DecreasePrecip(WeatherCell cell, int change)
{
cell.ChangePrecip(-1 * change);
}