fix(bitswap.unwant) parse CID from arg just like block.add does

src/bitswap/unwant.js

@@ -1,13 +1,33 @@
 'use strict'
 
 const promisify = require('promisify-es6')
+const CID = require('cids')
 
 module.exports = (send) => {
   return promisify((args, opts, callback) => {
     if (typeof (opts) === 'function') {
       callback = opts
       opts = {}
     }
+
+    // Mirrors block.get's parsing of the CID
+    let cid
+    try {
+      if (CID.isCID(args)) {
+        cid = args
+        args = cid.toBaseEncodedString()
+      } else if (Buffer.isBuffer(args)) {
+        cid = new CID(args)
+        args = cid.toBaseEncodedString()
+      } else if (typeof args === 'string') {
+        cid = new CID(args)
+      } else {
+        return callback(new Error('invalid argument'))
+      }
+    } catch (err) {
+      return callback(err)
+    }
+
     send({
       path: 'bitswap/unwant',
       args: args,

test/interface/bitswap.spec.js

@@ -0,0 +1,32 @@
+/* eslint-env mocha */
+
+'use strict'
+
+const test = require('interface-ipfs-core')
+const parallel = require('async/parallel')
+
+const IPFSApi = require('../../src')
+const f = require('../utils/factory')
+
+const nodes = []
+const common = {
+  setup: function (callback) {
+    callback(null, {
+      spawnNode: (cb) => {
+        f.spawn({ initOptions: { bits: 1024 } }, (err, _ipfsd) => {
+          if (err) {
+            return cb(err)
+          }
+
+          nodes.push(_ipfsd)
+          cb(null, IPFSApi(_ipfsd.apiAddr))
+        })
+      }
+    })
+  },
+  teardown: function (callback) {
+    parallel(nodes.map((node) => (cb) => node.stop(cb)), callback)
+  }
+}
+
+test.bitswap(common)