Get tests passing again

modules/__tests__/invalidPackageNames-test.js

@@ -0,0 +1,19 @@
+import request from 'supertest';
+
+import createServer from '../createServer';
+
+describe('Invalid package names', () => {
+  let server;
+  beforeEach(() => {
+    server = createServer();
+  });
+
+  it('are rejected', done => {
+    request(server)
+      .get('/_invalid/index.js')
+      .end((err, res) => {
+        expect(res.statusCode).toBe(403);
+        done();
+      });
+  });
+});