add an intial test file for testing SSR

Author: trusktr

Diff for: packages/docsify-server-renderer/index.js

@@ -197,4 +197,6 @@ export default class Renderer {
   }
 }
 
+export { Renderer };
+
 Renderer.version = '__VERSION__';

Diff for: test/_helper.js

@@ -19,6 +19,19 @@ function ready(callback) {
   document.addEventListener('DOMContentLoaded', callback);
 }
 
+module.exports.initJSDOM = initJSDOM;
+function initJSDOM(markup = '') {
+  const dom = new JSDOM(markup);
+
+  global.window = dom.window;
+  global.document = dom.window.document;
+  global.navigator = dom.window.navigator;
+  global.location = dom.window.location;
+  global.XMLHttpRequest = dom.window.XMLHttpRequest;
+
+  return dom;
+}
+
 module.exports.init = function(
   fixture = 'default',
   config = {},
@@ -39,15 +52,9 @@ module.exports.init = function(
 
   const rootPath = path.join(__dirname, 'fixtures', fixture);
 
-  const dom = new JSDOM(markup);
+  const dom = initJSDOM(markup);
   dom.reconfigure({ url: 'file:///' + rootPath });
 
-  global.window = dom.window;
-  global.document = dom.window.document;
-  global.navigator = dom.window.navigator;
-  global.location = dom.window.location;
-  global.XMLHttpRequest = dom.window.XMLHttpRequest;
-
   // Mimic src/core/index.js but for Node.js
   function Docsify() {
     this._init();

Diff for: test/unit/server.test.js

@@ -0,0 +1,18 @@
+// @ts-check
+/* eslint-disable no-global-assign */
+require = require('esm')(
+  module /* , options */
+); /* eslint-disable-line no-global-assign */
+const { expect } = require('chai');
+const { initJSDOM } = require('../_helper');
+
+initJSDOM();
+
+const { Renderer } = require('../../packages/docsify-server-renderer/index');
+
+describe('pacakges/docsify-server-render', function() {
+  it('toURL', function() {
+    expect(Renderer).to.be.an.instanceof(Function);
+    expect('foo').equal('foo');
+  });
+});