Tests DateDiff, DatePart, DateAdd, DateValue, DateSerial and FormatDateTime functions.
DateDiff('d', '01/01/2025', '01/31/2025'): 30 (Expected: 30)
DatePart('m', '03/15/2025'): 3 (Expected: 3)
DatePart('d', '03/15/2025'): 15 (Expected: 15)
DatePart('yyyy', '03/15/2025'): 2025 (Esperado: 2025)
Todos os testes devem mostrar os valores esperados acima.