How to use the jest/blob/components/mock_data.RichViewerMock.type function in jest

it(`sets '${SimpleViewerMock.type}' as active on ${BLOB_RENDER_EVENT_SHOW_SOURCE} event`, () => {
        createComponent({
          data: {
            activeViewerType: RichViewerMock.type,
          },
        });

        findContentEl().vm.$emit(BLOB_RENDER_EVENT_SHOW_SOURCE);
        expect(wrapper.vm.activeViewerType).toEqual(SimpleViewerMock.type);
      });
    });

it('sets rich viewer correctly', () => {
      const data = { ...dataMock, activeViewerType: RichViewerMock.type };
      createComponent({
        data,
      });
      expect(wrapper.find(RichViewer).exists()).toBe(true);
    });

it('switches to the passed viewer', () => {
          createComponent();

          wrapper.vm.switchViewer(RichViewerMock.type);
          return wrapper.vm
            .$nextTick()
            .then(() => {
              expect(wrapper.vm.activeViewerType).toBe(RichViewerMock.type);
              expect(wrapper.find(RichViewer).exists()).toBe(true);

              wrapper.vm.switchViewer(SimpleViewerMock.type);
            })
            .then(() => {
              expect(wrapper.vm.activeViewerType).toBe(SimpleViewerMock.type);
              expect(wrapper.find(SimpleViewer).exists()).toBe(true);
            });
        });
      });

.then(() => {
              expect(wrapper.vm.activeViewerType).toBe(RichViewerMock.type);
              expect(wrapper.find(RichViewer).exists()).toBe(true);

              wrapper.vm.switchViewer(SimpleViewerMock.type);
            })
            .then(() => {