text: const extend = require('extend');
  const Identifier = require('./index');
  
  describe('Lib Helpers Identifier', () => {
    let instanceA;
    let instanceB;
  
    beforeEach(() => {
      instanceA = Identifier({});
      instanceB = Identifier({});
    });
  
    it('should be defined', () => {
      expect(Identifier).to.not.be.undefined;
      expect(instanceA).to.not.be.undefined;
      expect(instanceA.id).to.not.be.undefined;
      expect(instanceB).to.not.be.undefined;
      expect(instanceB.id).to.not.be.undefined;
    });
  
    it('should follow consecutive ID assignment', () => {
      expect(instanceB.id).to.equal(instanceA.id + 1);
    });
  });
  