public void ForDates_1_1_2013_to_20_1_2014_ShouldReturnBudget1And2()
{
BudgetCollection subject = Arrange();
IEnumerable<BudgetModel> result = subject.ForDates(new DateTime(2013, 1, 1), new DateTime(2014, 1, 20));
Assert.AreEqual(2, result.Count());
}