Add some server tests

server/createApp.test.js

@@ -0,0 +1,32 @@
+const request = require('supertest')
+const createApp = require('./createApp')
+
+describe('The server app', function () {
+  let app
+  beforeEach(function () {
+    app = createApp()
+  })
+
+  it('rejects invalid package names', function (done) {
+    request(app).get('/_invalid/index.js').then(function (res) {
+      expect(res.statusCode).toBe(403)
+      done()
+    })
+  })
+
+  it('redirects invalid query params', function (done) {
+    request(app).get('/react?main=index&invalid').then(function (res) {
+      expect(res.statusCode).toBe(302)
+      expect(res.headers.location).toBe('/react?main=index')
+      done()
+    })
+  })
+
+  it('redirects /_meta to ?meta', function (done) {
+    request(app).get('/_meta/react?main=index').then(function (res) {
+      expect(res.statusCode).toBe(302)
+      expect(res.headers.location).toBe('/react?main=index&meta')
+      done()
+    })
+  })
+})