refactor: modularize pubsub api(ipfs-inactive#544)

Author: nunofmn

src/api/pubsub.js

@@ -6,11 +6,14 @@ const eos = require('end-of-stream')
 const isNode = require('detect-node')
 const PubsubMessageStream = require('../pubsub-message-stream')
 const stringlistToArray = require('../stringlist-to-array')
+const moduleConfig = require('../module-config')
 
 const NotSupportedError = () => new Error('pubsub is currently not supported when run in the browser')
 
 /* Public API */
-module.exports = (send) => {
+module.exports = (arg) => {
+  const send = moduleConfig(arg)
+
   /* Internal subscriptions state and functions */
   const ps = new EventEmitter()
   const subscriptions = {}

test/sub-modules.spec.js

@@ -293,4 +293,12 @@ describe('submodules', () => {
       expect(appendData).to.be.a('function')
     })
   })
+
+  describe('pubsub', () => {
+    const pubsub = require('../src/api/pubsub')
+
+    it('.pubsub', () => {
+      expect(pubsub).to.be.a('function')
+    })
+  })
 })