test: add test case

test/unit/modules.spec.js

@@ -1,4 +1,4 @@
-import { h, nextTick } from 'vue'
+import { computed, h, nextTick } from 'vue'
 import { mount } from 'test/helpers'
 import Vuex from '@/index'
 
@@ -925,4 +925,31 @@ describe('Modules', () => {
  /getters should be function but "getters\.test" in module "foo\.bar" is true/
  )
  })
+
+ it('module: computed getter should be reactive after module registration', () => {
+ const store = new Vuex.Store({
+ state: {
+ foo: 0
+ },
+ getters: {
+ getFoo: state => state.foo,
+ },
+ mutations: {
+ incrementFoo: state => state.foo++
+ }
+ })
+
+ const computedFoo = computed(() => store.getters.getFoo)
+ store.commit('incrementFoo')
+ expect(computedFoo.value).toBe(1)
+
+ store.registerModule('bar', {
+ state: {
+ bar: 0
+ }
+ })
+
+ store.commit('incrementFoo')
+ expect(computedFoo.value).toBe(2)
+ })
 })