public void TestQuarterCalc()
{
for(int month = 1; month <= 12; month++)
{
DateTime qtrTest = new DateTime(2013, month, 5);
int quarter = qtrTest.Quarter();
if(qtrTest.Month >= 1 && qtrTest.Month <= 3)
Assert.AreEqual(1, quarter);
else if(qtrTest.Month >= 4 && qtrTest.Month <= 6)
Assert.AreEqual(2, quarter);
else if(qtrTest.Month >= 7 && qtrTest.Month <= 9)
Assert.AreEqual(3, quarter);
else if(qtrTest.Month >= 10 && qtrTest.Month <= 12)
Assert.AreEqual(4, quarter);
}
}