text: describe("Person", function(){
      var person;
      beforeEach(function(){
          person = new Person("first_name", "last_name");
      });
  
      // testing Person properties
      it("it should have a first name #firstName", function() {
          expect(person.firstName).toEqual("first_name");
      });
  
      it("it should have a last name #lastName", function() {
          expect(person.lastName).toEqual("last_name");
      });
  
      it("should have a method #sayHello", function(){
          expect(person.sayHello()).toEqual("Hello, my name is first_name last_name");
      })
  });
  
  