Added localtunnel error listener to prevent browsersync from crashing.

Author: imolorhe

lib/tunnel.js

@@ -24,6 +24,12 @@ module.exports = function (bs, cb) {
         if (err) {
             return cb(err);
         }
+
+        tunnel.on("error", function (err) {
+            bs.logger.info("Localtunnel issue: " + err.message);
+            bs.logger.info("Oops! The localtunnel appears to have disconnected. Reconnecting...");
+        });
+
         return cb(null, tunnel);
     });
 };

test/specs/e2e/server/e2e.server.tunnel.js

@@ -81,7 +81,26 @@ describe("Tunnel e2e tests with Error", function () {
         browserSync(config, function (err, bs) {
             assert.isUndefined(bs.options.getIn(["urls", "tunnel"]));
             delete require.cache[tunnelPath];
+            bs.cleanup();
             done();
         });
     });
-});
+
+    it("does not crash if tunnel restarts", function(done) {
+        browserSync.reset();
+        var config = {
+            server: {
+                baseDir: "test/fixtures"
+            },
+            open: false,
+            tunnel: true,
+            online: true
+        };
+
+        browserSync(config, function(err, bs) {
+            bs.tunnel.emit("error", new Error("connection refused: (check your firewall settings)"));
+            bs.cleanup();
+            done();
+        });
+    });
+});