fix: config.replace (#634)

* Fixed config.replace. Should fix #633

* not expecting anuy response any more when sending one file

* un-only test

src/config/replace.js

@@ -2,17 +2,15 @@
 
 const streamifier = require('streamifier')
 const promisify = require('promisify-es6')
+const SendOneFile = require('../utils/send-one-file')
 
 module.exports = (send) => {
+  const sendOneFile = SendOneFile(send, 'config/replace')
   return promisify((config, callback) => {
     if (typeof config === 'object') {
       config = streamifier.createReadStream(Buffer.from(JSON.stringify(config)))
     }
 
-    send({
-      path: 'config/replace',
-      files: config,
-      buffer: true
-    }, callback)
+    sendOneFile(config, {}, callback)
   })
 }

src/utils/send-one-file.js

@@ -9,9 +9,6 @@ module.exports = (send, path) => {
       if (err) {
         return callback(err)
       }
-      if (results.length !== 1) {
-        return callback(new Error('expected 1 result and had ' + results.length))
-      }
       callback(null, results[0])
     })
   }