test: add unit tests for proxyURL

Author: 06kellyjac

test/proxyURL.test.js

@@ -0,0 +1,51 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const express = require('express');
+const chaiHttp = require('chai-http');
+const { getProxyURL } = require('../src/service/proxyURL');
+const config = require('../src/config');
+
+chai.use(chaiHttp);
+chai.should();
+const expect = chai.expect;
+
+const genSimpleServer = () => {
+  const app = express();
+  app.get('/', (req, res) => {
+    res.contentType('text/html');
+    res.send(getProxyURL(req));
+  });
+  return app;
+};
+
+describe('proxyURL', async () => {
+  afterEach(() => {
+    sinon.restore();
+  });
+
+  it('pulls the request path with no override', async () => {
+    const app = genSimpleServer();
+    const res = await chai.request(app).get('/').send();
+    res.should.have.status(200);
+
+    // request url without trailing slash
+    const reqURL = res.request.url.slice(0, -1);
+    expect(res.text).to.equal(reqURL);
+    expect(res.text).to.match(/https?:\/\/127.0.0.1:\d+/);
+  });
+
+  it('can override providing a proxy value', async () => {
+    const proxyURL = 'https://amazing-proxy.path.local';
+    // stub getDomains
+    const configGetDomainsStub = sinon.stub(config, 'getDomains').returns({ proxy: proxyURL });
+
+    const app = genSimpleServer();
+    const res = await chai.request(app).get('/').send();
+    res.should.have.status(200);
+
+    // the stub worked
+    expect(configGetDomainsStub.calledOnce).to.be.true;
+
+    expect(res.text).to.equal(proxyURL);
+  });
+});