How to use the @jupyterlab/cells.InputArea.ContentFactory function in @jupyterlab/cells

it('should create a new content factory', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory).to.be.an.instanceof(InputArea.ContentFactory);
        });
      });

it('should create an input prompt', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory.createInputPrompt()).to.be.an.instanceof(InputPrompt);
        });
      });

it('should create an input prompt', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory.createInputPrompt()).to.be.an.instanceof(InputPrompt);
        });
      });

it('should be the code editor factory being used', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory.editorFactory).to.equal(
            InputArea.defaultEditorFactory
          );
        });
      });

it('should be the code editor factory being used', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory.editorFactory).to.equal(
            InputArea.defaultEditorFactory
          );
        });
      });

it('should create a new content factory', () => {
          const factory = new InputArea.ContentFactory();
          expect(factory).to.be.an.instanceof(InputArea.ContentFactory);
        });
      });