How to use the @jupyterlab/outputarea.OutputArea.ContentFactory function in @jupyterlab/outputarea

it('should create an output prompt', () => {
          const factory = new OutputArea.ContentFactory();
          expect(factory.createOutputPrompt().executionCount).to.be.null;
        });
      });

it('should create a stdin widget', async () => {
          const kernel = await Kernel.startNew();
          await kernel.ready;
          const factory = new OutputArea.ContentFactory();
          const future = kernel.requestExecute({ code: CODE });
          const options = {
            prompt: 'hello',
            password: false,
            future
          };
          expect(factory.createStdin(options)).to.be.an.instanceof(Widget);
          await kernel.shutdown();
          kernel.dispose();
        });
      });

it('should create an output prompt', () => {
          const factory = new OutputArea.ContentFactory();
          expect(factory.createOutputPrompt().executionCount).to.be.null;
        });
      });

it('should create a stdin widget', async () => {
          const kernel = await Kernel.startNew();
          await kernel.ready;
          const factory = new OutputArea.ContentFactory();
          const future = kernel.requestExecute({ code: CODE });
          const options = {
            prompt: 'hello',
            password: false,
            future
          };
          expect(factory.createStdin(options)).to.be.an.instanceof(Widget);
          await kernel.shutdown();
          kernel.dispose();
        });
      });