Function openMenuOnHover

src/cdk/menu/menu.spec.ts:171–178

Using a fake hover event, open the specified menu given a reference to its trigger.

(menuElement?: HTMLElement)

      }
      /** Using a fake hover event, open the specified menu given a reference to its trigger. */
      function openMenuOnHover(menuElement?: HTMLElement) {
        if (menuElement) {
          dispatchMouseEvent(menuElement, 'mouseenter');
          detectChanges();
        } else {
          throw Error('No element trigger provided. Is it visible in the DOM?');
        }
      }

      /**
       * Fakes mouse hover events from some source point to some target point. Along the way, emits