test: add assertion for ping rtt

Author: daviddias

package.json

@@ -29,7 +29,8 @@
     "url": "https://github.com/ipfs/js-libp2p-ipfs-nodejs/issues"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=4.0.0",
+    "npm": ">=3.0.0"
   },
   "homepage": "https://github.com/ipfs/js-libp2p-ipfs-nodejs#readme",
   "devDependencies": {
@@ -40,7 +41,7 @@
     "pull-stream": "^3.5.0"
   },
   "dependencies": {
-    "libp2p": "^0.3.0",
+    "libp2p": "^0.3.1",
     "libp2p-secio": "^0.6.3",
     "libp2p-spdy": "^0.10.0",
     "libp2p-swarm": "^0.26.3",
@@ -61,4 +62,4 @@
     "Stephen Whitmore <stephen.whitmore@gmail.com>",
     "varunagarwal315 <varunagarwal315@gmail.com>"
   ]
-}
+}

test/libp2p.spec.js

@@ -409,6 +409,7 @@ describe('libp2p-ipfs-nodejs', () => {
     nodeE.pingByPeerInfo(nodeF.peerInfo, (err, ping) => {
       expect(err).to.not.exist
       ping.once('ping', (time) => {
+        expect(time).to.be.above(1)
         ping.stop()
         done()
       })