public void ReturnTrue_WhenVerifying_GivenInputIs4()
        {
            var result = LeapYearVerifier.IsLeapYear(4);

            result.Should().BeTrue();
        }
        public void ReturnFalse_WhenVerifying_Given1()
        {
            var result = LeapYearVerifier.IsLeapYear(1);

            result.Should().BeFalse();
        }