public IEnumerable<TestCaseData> Should_ReturnNumberOfWeek_WhenCalledOn_TestCaseSource()
{
yield return new TestCaseData(new DateTime(2012, 1, 2));
yield return new TestCaseData(new DateTime(2012, 1, 3));
yield return new TestCaseData(new DateTime(2012, 1, 4));
yield return new TestCaseData(new DateTime(2012, 1, 5));
yield return new TestCaseData(new DateTime(2012, 1, 6));
yield return new TestCaseData(new DateTime(2012, 1, 7));
yield return new TestCaseData(new DateTime(2012, 1, 8));
}