refactor: core async (#478)

* refactor: cleanup core

test: auto dial on startup

* fix: make hangup work properly

* chore: fix lint

* chore: apply suggestions from code review

Co-Authored-By: Vasco Santos <vasco.santos@moxy.studio>

test/peer-discovery/index.spec.js

@@ -0,0 +1,45 @@
+'use strict'
+/* eslint-env mocha */
+
+const chai = require('chai')
+chai.use(require('dirty-chai'))
+const { expect } = chai
+const sinon = require('sinon')
+const defer = require('p-defer')
+
+const Libp2p = require('../../src')
+const baseOptions = require('../utils/base-options.browser')
+const { createPeerInfoFromFixture } = require('../utils/creators/peer')
+
+describe('peer discovery', () => {
+  let peerInfo
+  let remotePeerInfo
+  let libp2p
+
+  before(async () => {
+    [peerInfo, remotePeerInfo] = await createPeerInfoFromFixture(2)
+  })
+
+  afterEach(async () => {
+    libp2p && await libp2p.stop()
+  })
+
+  it('should dial know peers on startup', async () => {
+    libp2p = new Libp2p({
+      ...baseOptions,
+      peerInfo
+    })
+    libp2p.peerStore.add(remotePeerInfo)
+    const deferred = defer()
+    sinon.stub(libp2p.dialer, 'connectToPeer').callsFake((remotePeerInfo) => {
+      expect(remotePeerInfo).to.equal(remotePeerInfo)
+      deferred.resolve()
+    })
+    const spy = sinon.spy()
+    libp2p.on('peer:discovery', spy)
+
+    libp2p.start()
+    await deferred.promise
+    expect(spy.getCall(0).args).to.eql([remotePeerInfo])
+  })
+})