test: setup global variables

Author: Donaldcwl

.mocharc.js

@@ -1,4 +1,4 @@
 module.exports = {
   recursive: true,
-  require: ['@babel/register', '@babel/polyfill', './test/setup_jsdom.js']
+  require: ['@babel/register', '@babel/polyfill', './test/setup_global.js', './test/setup_jsdom.js']
 }

test/setup_global.js

@@ -0,0 +1,6 @@
+const pkg = require('../package.json');
+
+global.process.env.NODE_ENV = 'production';
+global.process.env.BUILD = 'production';
+global.__buildDate__ = () => JSON.stringify(new Date());
+global.__buildVersion__ = JSON.stringify(pkg.version);