public void When_InvalidParameters_Then_ReturnFalse()
            {
                var result = ValidatorExtensions.IsValidDate(2021, 2, 31);

                result.Should().BeFalse();
            }
            public void When_ValidParameters_Then_ReturnTrue()
            {
                var result = ValidatorExtensions.IsValidDate(2021, 2, 1);

                result.Should().BeTrue();
            }