Allow no publicPath or entry point (#1310)

* fix(addDevServerEntrypoints): allow no entry point to be given

* test(entry): ensure src is added as default if no entry specified

Author: ryanclark

lib/util/addDevServerEntrypoints.js

@@ -27,7 +27,7 @@ module.exports = function addDevServerEntrypoints(webpackOptions, devServerOptio
       } else if (typeof wpOpt.entry === 'function') {
         wpOpt.entry = wpOpt.entry(devClient);
       } else {
-        wpOpt.entry = devClient.concat(wpOpt.entry);
+        wpOpt.entry = devClient.concat(wpOpt.entry || './src');
       }
     });
   }

test/Entry.test.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const assert = require('assert');
+const addDevServerEntrypoints = require('../lib/util/addDevServerEntrypoints');
+
+describe('Entry', () => {
+  it('default to src if no entry point is given', (done) => {
+    const webpackOptions = {};
+    const devServerOptions = {};
+
+    addDevServerEntrypoints(webpackOptions, devServerOptions);
+
+    assert(webpackOptions.entry.length, 2);
+    assert(webpackOptions.entry[1], './src');
+
+    done();
+  });
+});