Don't use default params

lib/createConfig.js

@@ -16,7 +16,9 @@ var _paths = require('./paths');
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
-const createConfig = ({ filename, entry, plugins = [] }) => {
+const createConfig = ({ filename, entry, plugins }) => {
+  plugins = plugins || [];
+
   return {
     resolve: {
       extensions: ['.js', '.jsx']

specs/createConfig.spec.js

@@ -2,21 +2,14 @@ import test from 'tape';
 import createConfig from '../src/createConfig';
 import { cacheDir } from '../src/paths';
 import path from 'path';
-import webpack from 'webpack';
 
 test('createConfig', (t) => {
   const filename = '[name].[hash].js';
   const entry = {
     vendor: ['react', 'react-dom']
   };
 
-  const plugins = [
-    new webpack.optimize.UglifyJsPlugin({
-      compress: true,
-    }),
-  ];
-
-  const results = createConfig({ filename, entry, plugins });
+  const results = createConfig({ filename, entry });
 
   const expected = {
     resolve: {
@@ -37,11 +30,6 @@ test('createConfig', (t) => {
           path: path.join(cacheDir, '/[name].manifest.json'),
           name: '[name]_[hash]'
         }
-      },
-      {
-        options: {
-          compress: true,
-        }
       }
     ]
   };

specs/pluginSupport.spec.js

@@ -0,0 +1,51 @@
+import test from 'tape';
+import createConfig from '../src/createConfig';
+import { cacheDir } from '../src/paths';
+import path from 'path';
+import webpack from 'webpack';
+
+test('pluginSupport', (t) => {
+  const filename = '[name].[hash].js';
+  const entry = {
+    vendor: ['react', 'react-dom']
+  };
+
+  const plugins = [
+    new webpack.optimize.UglifyJsPlugin({
+      compress: true,
+    }),
+  ];
+
+  const results = createConfig({ filename, entry, plugins });
+
+  const expected = {
+    resolve: {
+      extensions: [
+        '.js',
+        '.jsx'
+      ]
+    },
+    entry: entry,
+    output: {
+      path: path.join(cacheDir, '/bundles'),
+      filename: filename,
+      library: '[name]_[hash]'
+    },
+    plugins: [
+      {
+        options: {
+          path: path.join(cacheDir, '/[name].manifest.json'),
+          name: '[name]_[hash]'
+        }
+      },
+      {
+        options: {
+          compress: true,
+        }
+      }
+    ]
+  };
+
+  t.deepEqual(results, expected, 'should out config currently with plugins');
+  t.end();
+});

src/createConfig.js

@@ -2,7 +2,9 @@ import webpack from 'webpack';
 import path from 'path';
 import { cacheDir } from './paths';
 
-const createConfig = ({ filename, entry, plugins = [] }) => {
+const createConfig = ({ filename, entry, plugins }) => {
+  plugins = plugins || [];
+
   return {
     resolve: {
       extensions: ['.js', '.jsx']