Changed custom differ to be a parameter defaulting to deep-diff

Author: Tim van der Horst

spec/diff.spec.js

@@ -1,6 +1,6 @@
 import sinon from 'sinon';
 import { expect } from 'chai';
-import differ from 'deep-diff';
+import deepDiff from 'deep-diff';
 import { style, render, default as diffLogger } from '../src/diff';
 
 context('Diff', () => {
@@ -117,7 +117,7 @@ context('Diff', () => {
       const callback = sinon.spy();
       const customDiffer = (prevState, newState) => {
         callback();
-        return differ(prevState, newState);
+        return deepDiff(prevState, newState);
       };
       diffLogger({name: 'kirk'}, {name: 'picard'}, logger, false, customDiffer);
 

src/diff.js

@@ -1,4 +1,4 @@
-import differ from 'deep-diff';
+import deepDiff from 'deep-diff';
 
 // https://github.com/flitbit/diff#differences
 const dictionary = {
@@ -41,8 +41,8 @@ export function render(diff) {
   }
 }
 
-export default function diffLogger(prevState, newState, logger, isCollapsed, customDiffer) {
-  const diff = (customDiffer || differ)(prevState, newState);
+export default function diffLogger(prevState, newState, logger, isCollapsed, differ = deepDiff) {
+  const diff = differ(prevState, newState);
 
   try {
     if (isCollapsed) {