test: add unit test for translations

Author: xudafeng

test/en-US.test.js

@@ -0,0 +1,12 @@
+const assert = require('assert');
+const translations = require('../en-US.js');
+
+describe('en-US translations', function() {
+  it('should have correct translation for "启动失败"', function() {
+    assert.strictEqual(translations['启动失败'], 'failed');
+  });
+
+  it('should have correct translation for "系统提示"', function() {
+    assert.strictEqual(translations['系统提示'], 'System infomation');
+  });
+});