fix(createOrApplyPath): fixed an issue with correct object mapping. a…

…dded test

src/lib/__tests__/utils.ts

@@ -3,7 +3,12 @@ import expect from 'expect'
 import { Patch } from 'immer'
 import { serializers } from '../serializers'
 import { DEFAULT_NAMESPACE } from '../store'
-import { createQueriesFromPatch, flattenConfig, pm } from '../utils'
+import {
+  createOrApplyPath,
+  createQueriesFromPatch,
+  flattenConfig,
+  pm
+} from '../utils'
 
 describe('utils', () => {
   describe('flattenConfig', () => {
@@ -27,6 +32,32 @@ describe('utils', () => {
     })
   })
 
+  describe('createOrApplyPath', () => {
+    it('should map an object', () => {
+      const object = {
+        some: {
+          path: 'test'
+        },
+        somewhere: {
+          else: {
+            deep: 'xyz'
+          }
+        }
+      }
+
+      createOrApplyPath(object, ['some', 'path'], 'new value')
+
+      expect(object).toEqual({
+        some: { path: 'new value' },
+        somewhere: {
+          else: {
+            deep: 'xyz'
+          }
+        }
+      })
+    })
+  })
+
   describe('createQueriesFromPatch', () => {
     const config = {
       parameter: pm('p', serializers.string)

src/lib/utils.ts

@@ -10,14 +10,14 @@ export const pm = (name: string, serializer: Serializer) => (): Parameter => ({
   serializer
 })
 
-const createOrApplyPath = (
+export const createOrApplyPath = (
   obj: GenericObject,
   path: readonly string[],
-  value = null
+  value: any = null
 ) => {
   let current = obj
   let thisPath: ReadonlyArray<string> = [...path]
-  while (path.length > 1) {
+  while (thisPath.length > 1) {
     const [head, ...tail] = thisPath
     thisPath = tail
     if (current[head] === undefined) {