From f22ee2a21ca7648733f5dc9cf0da2a71b4916593 Mon Sep 17 00:00:00 2001
From: Dmitriy Ryajov <dryajov@gmail.com>
Date: Sat, 18 Nov 2017 15:41:45 -0600
Subject: [PATCH] fix: don't dial circuit if no transports available (#236)

---
 src/dial.js     | 4 ++++
 test/circuit.js | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/dial.js b/src/dial.js
index 8bb5c5a2c0..c90a1368e6 100644
--- a/src/dial.js
+++ b/src/dial.js
@@ -83,6 +83,10 @@ function dial (swarm) {
     function attemptDial (pi, cb) {
       const tKeys = swarm.availableTransports(pi)
 
+      if (tKeys.length === 0) {
+        return cb(new Error('No transports registered, dial not possible'))
+      }
+
       nextTransport(tKeys.shift())
 
       function nextTransport (key) {
diff --git a/test/circuit.js b/test/circuit.js
index 70d8cf9a9f..b65a337666 100644
--- a/test/circuit.js
+++ b/test/circuit.js
@@ -102,12 +102,12 @@ describe(`circuit`, function () {
     })
   })
 
-  it(`should not try circuit if not enabled`, function (done) {
+  it(`should not try circuit if no transports enabled`, function (done) {
     swarmC.dial(peerA, (err, conn) => {
       expect(err).to.exist()
       expect(conn).to.not.exist()
 
-      expect(err).to.match(/Could not dial in any of the transports or relays/)
+      expect(err).to.match(/No transports registered, dial not possible/)
       done()
     })
   })