WIP - feat: convergence (#94)

* feat: convergence

* structure examples

test/nodejs-bundle/turbolence.js

@@ -0,0 +1,84 @@
+/* eslint-env mocha */
+'use strict'
+
+const chai = require('chai')
+chai.use(require('dirty-chai'))
+const expect = chai.expect
+const multiaddr = require('multiaddr')
+const spawn = require('child_process').spawn
+const path = require('path')
+// const map = require('async/map')
+const pull = require('pull-stream')
+const utils = require('./utils')
+const createNode = utils.createNode
+const echo = utils.echo
+
+describe('Turbolence tests', () => {
+  let nodeA
+  let nodeSpawn
+
+  before((done) => {
+    createNode('/ip4/0.0.0.0/tcp/0', (err, node) => {
+      expect(err).to.not.exist()
+      nodeA = node
+      node.handle('/echo/1.0.0', echo)
+      node.start(done)
+    })
+  })
+
+  after((done) => nodeA.stop(done))
+
+  it('spawn a node in a different process', (done) => {
+    const filePath = path.join(__dirname, './spawn-libp2p-node.js')
+
+    nodeSpawn = spawn(filePath, { env: process.env })
+
+    let spawned = false
+
+    nodeSpawn.stdout.on('data', (data) => {
+      // console.log(data.toString())
+      if (!spawned) {
+        spawned = true
+        done()
+      }
+    })
+
+    nodeSpawn.stderr.on('data', (data) => console.log(data.toString()))
+  })
+
+  it('connect nodeA to that node', (done) => {
+    const spawnedId = require('./test-data/test-id.json')
+    const maddr = multiaddr('/ip4/127.0.0.1/tcp/12345/ipfs/' + spawnedId.id)
+
+    nodeA.dial(maddr, '/echo/1.0.0', (err, conn) => {
+      expect(err).to.not.exist()
+      const peers = nodeA.peerBook.getAll()
+
+      expect(Object.keys(peers)).to.have.length(1)
+
+      pull(
+        pull.values([new Buffer('hey')]),
+        conn,
+        pull.collect((err, data) => {
+          expect(err).to.not.exist()
+          expect(data).to.eql([new Buffer('hey')])
+          done()
+        })
+      )
+    })
+  })
+
+  it('crash that node, ensure nodeA continues going steady', (done) => {
+    // TODO investigate why CI crashes
+    setTimeout(() => nodeSpawn.kill('SIGKILL'), 1000)
+    // nodeSpawn.kill('SIGKILL')
+    setTimeout(check, 5000)
+
+    function check () {
+      const peers = nodeA.peerBook.getAll()
+      expect(Object.keys(peers)).to.have.length(1)
+      expect(Object.keys(nodeA.swarm.muxedConns)).to.have.length(0)
+      done()
+    }
+  })
+})