fixes tests with block-stream2

Author: hackergrrl

package.json

@@ -27,6 +27,7 @@
   },
   "homepage": "https://github.com/diasdavid/js-ipfs-data-importing#readme",
   "devDependencies": {
+    "block-stream2": "^1.1.0",
     "brfs": "^1.4.3",
     "bs58": "^3.0.0",
     "buffer-loader": "0.0.1",

src/chunker-fixed-size.js

@@ -1,45 +1,5 @@
-var through2 = require('through2')
+var chunker = require('block-stream2')
 
-exports = module.exports = FixedSizeChunker
-
-// The difference of this chunker compared to other fixed size chunkers
-// available, is that it doesn't add padding the last chunk
-
-function FixedSizeChunker (size) {
-  var stream = through2(transform, flush)
-
-  var buf = new Buffer(0)
-
-  function transform (chunk, enc, cb) {
-    var that = this
-
-    buf = Buffer.concat([buf, chunk])
-
-    if (buf.length >= size) {
-      slice()
-    }
-
-    function slice () {
-      var chunk = new Buffer(size, 'binary')
-      var newBuf = new Buffer(buf.length - size, 'binary')
-      buf.copy(chunk, 0, 0, size)
-      buf.copy(newBuf, 0, size, buf.length)
-      buf = newBuf
-      that.push(chunk)
-
-      if (buf.length >= size) {
-        return slice()
-      }
-    }
-
-    cb()
-  }
-
-  function flush (cb) {
-    // last chunk
-    this.push(buf)
-    cb()
-  }
-
-  return stream
+exports = module.exports = function (size) {
+  return chunker({ size: size, zeroPadding: false })
 }