test(runtime-vapor): add misc test (#246)

packages/runtime-vapor/__tests__/misc.spec.ts

@@ -0,0 +1,14 @@
+import { isReactive, reactive } from 'vue'
+import { makeRender } from './_utils'
+
+const define = makeRender()
+
+describe('misc', () => {
+  test.fails('component public instance should not be observable', () => {
+    const { instance } = define({}).render()
+    expect(instance).toBeDefined()
+    const r = reactive(instance!)
+    expect(r).toBe(instance)
+    expect(isReactive(r)).toBe(false)
+  })
+})