update add test

Author: nginnever

test/files.js

@@ -22,14 +22,15 @@ module.exports = (common) => {
       common.teardown(done)
     })
 
+    // go-ipfs http and js-ipfs core have different responses
     describe('.add', () => {
       it('add', (done) => {
         const buffered = new Buffer('some data')
         const rs = new Readable()
         rs.push(buffered)
         rs.push(null)
         const arr = []
-        const filePair = {path: 'data.txt', stream: rs}
+        const filePair = {path: 'data.txt', content: rs}
         arr.push(filePair)
         ipfs.add(arr, (err, res) => {
           expect(err).to.not.exist