getInitialStoreState returns a deep copy of state

Author: dmitry-zaets

package.json

@@ -39,6 +39,7 @@
     "rimraf": "^2.5.2"
   },
   "dependencies": {
+    "lodash.clonedeep": "^4.5.0",
     "lodash.findindex": "^4.4.0",
     "lodash.flattendeep": "^4.2.0",
     "redux": "^3.5.2",

src/initialState.js

@@ -1,3 +1,4 @@
+import cloneDeep from 'lodash.cloneDeep';
 import { createStore } from 'redux';
 
 let state = null;
@@ -12,7 +13,7 @@ function buildInitialStoreState(reducer) {
 }
 
 function getInitialStoreState() {
-  return state;
+  return cloneDeep(state);
 }
 
 export {

test/general/initialState.js

@@ -28,6 +28,14 @@ describe('initialState', () => {
       it('should return registered value', () => {
         expect(getInitialStoreState()).toEqual(initialStoreState);
       });
+
+      it('should return deep clone of registered value', () => {
+        const initialState = getInitialStoreState();
+        initialState.newInitialStoreStateKey = 'newInitialStoreStateKey';
+
+        expect(getInitialStoreState().newInitialStoreStateKey)
+          .toNotEqual(initialState.newInitialStoreStateKey);
+      });
     });
   });