fix: make tests consistent across js-ipfs/go-ipfs (#158)

* feat: add progress bar tests

* feat: fixing progress bar tests

* fix: consistent tests across js-ipfs and go-ipfs progress

* fix: rename progress acumulators for clarity

Author: dryajov

src/files.js

@@ -127,20 +127,20 @@ module.exports = (common) => {
           const expectedMultihash = 'Qme79tX2bViL26vNjPsF3DP1R9rMKMvnPYJiKTTKPrXJjq'
 
           let progCount = 0
-          let progress = 0
+          let accumProgress = 0
           const handler = (p) => {
             progCount += 1
-            progress += p
+            accumProgress = p
           }
 
-          ipfs.files.add(bigFile, {progress: handler}, (err, res) => {
+          ipfs.files.add(bigFile, { progress: handler }, (err, res) => {
             expect(err).to.not.exist()
             expect(res).to.have.length(1)
             const file = res[0]
             expect(file.hash).to.equal(expectedMultihash)
             expect(file.path).to.equal(file.hash)
             expect(progCount).to.equal(58)
-            expect(progress).to.equal(bigFile.byteLength)
+            expect(accumProgress).to.equal(bigFile.byteLength)
             done()
           })
         })
@@ -214,20 +214,20 @@ module.exports = (common) => {
           }, 0)
 
           let progCount = 0
-          let progress = 0
+          let accumProgress = 0
           const handler = (p) => {
             progCount += 1
-            progress += p
+            accumProgress += p
           }
 
-          ipfs.files.add(dirs, {progress: handler}, (err, res) => {
+          ipfs.files.add(dirs, { progress: handler }, (err, res) => {
             expect(err).to.not.exist()
             const root = res[res.length - 1]
 
             expect(root.path).to.equal('test-folder')
             expect(root.hash).to.equal(expectedRootMultihash)
             expect(progCount).to.equal(8)
-            expect(progress).to.equal(total)
+            expect(accumProgress).to.be.at.least(total)
             done()
           })
         })