text: describe("Airport", function () {
      var airport
  
      beforeEach(function () {
          airport = new Airport();
      });
  
      it("Airport is an object", function () {
          expect(airport).toBeInstanceOf(Object);
      });
  
      it("Airport lands plane", function() {
          plane = new Plane("BA", "One");
          airport.land(plane);
          expect(airport.landing_strip).toContain(plane);
      });
  });
  
  
  // --------------------- Planes ---------------------
  
  describe("Plane", function(){
      var plane
  
      beforeEach(function () {
          plane = new Plane();
      });
  
      it("Plane is an object", function () {
          expect(plane).toBeInstanceOf(Object);
      });
  })