How to use the @jupyterlab/outputarea.OutputAreaModel.defaultContentFactory function in @jupyterlab/outputarea

it('should be the content factory used by the model', () => {
        expect(model.contentFactory).to.equal(
          OutputAreaModel.defaultContentFactory
        );
      });
    });

it('should be the content factory used by the model', () => {
        expect(model.contentFactory).to.be(OutputAreaModel.defaultContentFactory);
      });

it('should be an instance of ContentFactory', () => {
      expect(OutputAreaModel.defaultContentFactory).to.be.an(OutputAreaModel.ContentFactory);
    });

it('should be an instance of ContentFactory', () => {
      expect(OutputAreaModel.defaultContentFactory).to.be.an.instanceof(
        OutputAreaModel.ContentFactory
      );
    });
  });

it('should be an instance of ContentFactory', () => {
      expect(OutputAreaModel.defaultContentFactory).to.be.an(OutputAreaModel.ContentFactory);
    });

it('should be the content factory used by the model', () => {
        expect(model.contentFactory).to.be(OutputAreaModel.defaultContentFactory);
      });