test: add rss unit test

Author: sinchang

test/app/controller/rss.test.js

@@ -0,0 +1,19 @@
+'use strict';
+
+const { app, assert } = require('egg-mock/bootstrap');
+
+describe('test/app/controller/rss.test.js', () => {
+  it('rss should ok', async () => {
+    const { config } = app;
+    config.debug = false;
+    const result1 = await app.httpRequest().get('/rss');
+    assert(result1.text.includes('CNode：Node.js专业中文社区'));
+
+    const result2 = await app.httpRequest().get('/rss');
+    assert(result2.text.includes('CNode：Node.js专业中文社区'));
+
+    config.rss = null;
+    await app.httpRequest().get('/rss').expect(404);
+    config.debug = true;
+  });
+});