Function setup

packages/vue/__tests__/e2e/Transition.spec.ts:1511–1515

()

              TrueBranch: {
                name: 'TrueBranch',
                setup() {
                  onUnmounted(unmountSpy)
                  const count = ref(0)
                  return () => h('div', count.value)
                },
              },
            },
            setup: () => {