text: describe('leapYear', function() {
    it("is false for a year that is not divisible by 4", function() {
      expect(leapYear(1999)).to.equal(false);
    });
  
    it("is true for most years divisible by 4", function() {
      expect(leapYear(2012)).to.equal(true);
    });
  
    it("is false for most years divisible by 100", function() {
      expect(leapYear(1900)).to.equal(false);
    });
  
    it("is true for most years divisible by 400", function() {
      expect(leapYear(1600)).to.equal(true);
    });
  });
  