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 that are 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 years divisible by 400", function() {
          expect(leapYear(800)).to.equal(true);
      });
  });
  