modify code to standard style

test/api/index.js

@@ -1,10 +1,12 @@
-
+/* eslint-disable no-unused-vars */
+/* eslint-disable no-undef */
+/* eslint-disable no-unused-expressions */
 it('api root test', done => {
   chai.request(server)
     .get('/api')
     .end((err, res) => {
       chai.expect(err).to.be.null
-      chai.expect(res).to.be.status(200)
+      chai.expect(res).to.have.status(200)
       done()
     })
-})
+})