public void TestGetExpectedRent()
{
//most straight foward example
var firstOfYear = new DateTime(DateTime.Today.Year, 1, 1);
var testSubject = new Rent(null, firstOfYear, 12, new Pecuniam(700), new Pecuniam(0));
var testResult = testSubject.GetExpectedTotalRent(new DateTime(DateTime.Today.Year, 3, 1));
//only two whole months have passed but rent's due on the first
Assert.AreEqual(new Pecuniam(700 * 3), testResult);
//after 15 days only first rent is due
testResult = testSubject.GetExpectedTotalRent(firstOfYear.AddDays(15));
Assert.AreEqual(new Pecuniam(700), testResult);
//back the signing date to middle of Dec
var newSigningDate = firstOfYear.AddDays(-16);
testSubject = new Rent(null, newSigningDate, 12, new Pecuniam(700), new Pecuniam(0));
//this should be only the pro-rated amount, first full month is due tommorrow
testResult = testSubject.GetExpectedTotalRent(newSigningDate.AddDays(15));
Assert.AreEqual(new Pecuniam(350), testResult);
//add another day - this should be pro-rated amount plus first month
testResult = testSubject.GetExpectedTotalRent(firstOfYear.AddDays(16));
Assert.AreEqual(new Pecuniam(350 + 700), testResult);
//move to first of Feb - this should be pro-rated amount plus two months rent
testResult = testSubject.GetExpectedTotalRent(new DateTime(DateTime.Today.Year, 2, 1));
Assert.AreEqual(new Pecuniam(350 + 700 * 2), testResult);
//middle of march -should be prorated amount plus three months
testResult = testSubject.GetExpectedTotalRent(new DateTime(DateTime.Today.Year, 3, 15));
Assert.AreEqual(new Pecuniam(350 + 700 * 3), testResult);
//on the last day of march - should still be the same
testResult = testSubject.GetExpectedTotalRent(new DateTime(DateTime.Today.Year, 4, 1).AddDays(-1));
Assert.AreEqual(new Pecuniam(350 + 700 * 3), testResult);
}