fix: ignore dial request when one is in progress (libp2p#283)

Author: jacobheun

src/connection/index.js

@@ -145,6 +145,8 @@ class ConnectionFSM extends BaseConnection {
   dial () {
     if (this.theirB58Id === this.ourPeerInfo.id.toB58String()) {
       return this.emit('error', Errors.DIAL_SELF())
+    } else if (this.getState() === 'DIALING') {
+      return this.log('attempted to dial while already dialing, ignoring')
     }
 
     this._state('dial')

test/connection.node.js

@@ -137,6 +137,20 @@ describe('ConnectionFSM', () => {
     connection.dial()
   })
 
+  it('should ignore concurrent dials', () => {
+    const connection = new ConnectionFSM({
+      _switch: dialerSwitch,
+      peerInfo: listenerSwitch._peerInfo
+    })
+
+    const stub = sinon.stub(connection, '_onDialing')
+
+    connection.dial()
+    connection.dial()
+
+    expect(stub.callCount).to.equal(1)
+  })
+
   it('should be able to encrypt a basic connection', (done) => {
     const connection = new ConnectionFSM({
       _switch: dialerSwitch,