fix: prefix namespace to in-action call of dynamic nested module (#283)

src/module.ts

@@ -171,7 +171,7 @@ export class Module<
     this.namespace = namespace
 
     const {
-      namespaced,
+      namespaced = true,
       state,
       getters,
       mutations,
@@ -184,8 +184,7 @@ export class Module<
       : Object.keys(modules).reduce(
           (acc, key) => {
             const m = modules[key]
-            const nextNamespaced =
-              m.options.namespaced === undefined ? true : m.options.namespaced
+            const nextNamespaced = m.options.namespaced ?? true
 
             const nextNamespaceKey = nextNamespaced ? key + '/' : ''
 
@@ -211,7 +210,7 @@ export class Module<
 
     return {
       options: {
-        namespaced: namespaced === undefined ? true : namespaced,
+        namespaced,
         state: () => (state ? new state() : {}),
         getters: gettersInstance && gettersInstance.getters,
         mutations: mutationsInstance && mutationsInstance.mutations,

test/register.spec.ts

@@ -21,12 +21,19 @@ class TestMutations extends Mutations<TestState> {
   }
 }
 
+class TestActions extends Actions<TestState, never, TestMutations> {
+  inc() {
+    this.commit('inc')
+  }
+}
+
 let test: Module<TestState, never, TestMutations, any, any>
 
 beforeEach(() => {
   test = new Module({
     state: TestState,
     mutations: TestMutations,
+    actions: TestActions,
   })
 })
 
@@ -40,6 +47,20 @@ describe('registerModule', () => {
     expect(store.state.test.count).toBe(1)
   })
 
+  it('prefixes the namespace for calls via a nested module action', () => {
+    const store = new Vuex.Store<any>({})
+    const parent = new Module({
+      modules: {
+        test,
+      },
+    })
+    registerModule(store, 'parent', 'parent', parent)
+
+    expect(store.state.parent.test.count).toBe(0)
+    store.dispatch('parent/test/inc')
+    expect(store.state.parent.test.count).toBe(1)
+  })
+
   it('passes module options of vuex', () => {
     const store = new Vuex.Store<any>({})
     store.replaceState({