test: fixed not trigger req in lookup testcase

test/node/lookup.js

@@ -2,20 +2,25 @@
 const assert = require('assert');
 const dns = require('dns');
 const request = require('../support/client');
-const setup = require('../support/setup');
+const getSetup = require('../support/setup');
 
-const base = setup.uri;
+let base = null;
 
 function myLookup(hostname, options, callback) {
   dns.lookup(hostname, options, callback);
 }
 
 describe('req.lookup()', () => {
-  it('should set a custom lookup', () => {
+  before(async () => {
+    const setup = await getSetup();
+    base = setup.uri;
+  });
+  it('should set a custom lookup', (done) => {
     const r = request.get(`${base}/ok`).lookup(myLookup);
     assert(r.lookup() === myLookup);
     r.then((res) => {
       res.text.should.equal('ok');
+      done();
     });
   });
 });