Adding mocha configuration

packages/neutrino-preset-node/config/eslint.js

@@ -0,0 +1 @@
+module.exports = require('neutrino-preset-base/config/eslint');

packages/neutrino-preset-node/package.json

@@ -11,6 +11,7 @@
   "license": "MPL-2.0",
   "dependencies": {
     "neutrino-preset-base": "1.0.0",
+    "webpack-merge": "0.14.1",
     "webpack-node-externals": "1.3.3"
   },
   "peerDependencies": {

packages/neutrino-preset-node/src/index.js

@@ -1,13 +1,21 @@
 'use strict';
 
+const merge = require('webpack-merge').smart;
 const preset = require('neutrino-preset-base');
 const nodeExternals = require('webpack-node-externals');
+const path = require('path');
 
-if (!preset.externals) {
-  preset.externals = [];
+module.exports = merge(preset, {
+  target: 'node',
+  devtool: process.env.NODE_ENV === 'production' ? '#eval-source-map' : null,
+  externals: [nodeExternals({ modulesFromFile: true })],
+  eslint: {
+    configFile: path.join(__dirname, '../config/eslint.js')
+  },
+  mocha: {
+    recursive: true,
+    reporter: 'spec',
+    ui: 'tdd',
+    bail: true
   }
-
-preset.target = 'node';
-preset.externals.push(nodeExternals({ modulesFromFile: true }));
-
-module.exports = preset;
+});