test: add circuit reconnect test

@whyrusleeping noticed a bug where this didn't appear to work. I can't reproduce
but this is still a useful test to have.

Author: Stebalien

test/circuit.js

@@ -15,10 +15,12 @@ const browser = require('./circuit/browser')
 const isNode = require('detect-node')
 const send = require('./utils/circuit').send
 const connect = require('./utils/circuit').connect
+const disconnect = require('./utils/circuit').disconnect
 
 const timeout = 80 * 1000
 const baseTest = {
   connect,
+  disconnect,
   send,
   timeout
 }
@@ -65,6 +67,18 @@ describe('circuit', () => {
       it('send', (done) => {
         tests[test].send(nodeA.ipfsd.api, nodeB.ipfsd.api, done)
       })
+
+      it('disconnect', (done) => {
+        tests[test].disconnect(nodeA, nodeB, done)
+      })
+
+      it('reconnect', (done) => {
+        tests[test].connect(nodeA, nodeB, relay, done)
+      })
+
+      it('resend', (done) => {
+        tests[test].send(nodeA.ipfsd.api, nodeB.ipfsd.api, done)
+      })
     })
   })
 })

test/utils/circuit.js

@@ -95,8 +95,8 @@ exports.createGoNode = (addrs, callback) => {
   })
 }
 
-const data = crypto.randomBytes(128)
 exports.send = (nodeA, nodeB, callback) => {
+  const data = crypto.randomBytes(128)
   waterfall([
     (cb) => nodeA.add(data, cb),
     (res, cb) => nodeB.cat(res[0].hash, cb),
@@ -161,3 +161,11 @@ exports.connWithTimeout = (timeout) => {
     connect(nodeA, nodeB, relay, timeout, callback)
   }
 }
+
+const disconnect = (nodeA, nodeB, callback) => {
+  series([
+    (cb) => nodeA.ipfsd.api.swarm.disconnect(getCircuitAddr(nodeB.addrs), cb)
+  ], callback)
+}
+
+exports.disconnect = disconnect