Method enterView

packages/core/test/render3/view_fixture.ts:209–211

* If you use `ViewFixture` and `enter()`, please add `afterEach(ViewFixture.cleanup);` to ensure * that he global `LFrame` stack gets cleaned up between the tests.

()

   * that he global `LFrame` stack gets cleaned up between the tests.
   */
  enterView() {
    enterView(this.lView);
  }

  leaveView() {
    leaveView();