public void IsLeapYearIfDivisibleBy4AndNotDivisibleBy100()
 {
     Assert.True(LeapYearCalculator.IsLeap(2016));
 }
 public void IsLeapYearIfDivisibleBy400()
 {
     Assert.True(LeapYearCalculator.IsLeap(2000));
 }
 public void IsNotLeapYearIfNotDivisibleBy400()
 {
     Assert.False(LeapYearCalculator.IsLeap(1900));
 }