add integration test for token discovery

Signed-off-by: Chanwit Kaewkasi <chanwit@gmail.com>

test/integration/token-discovery.bats

@@ -0,0 +1,29 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function token_cleanup() {
+	curl -X DELETE https://discovery-stage.hub.docker.com/v1/clusters/$1
+}
+
+function teardown() {
+	swarm_join_cleanup
+	swarm_manage_cleanup
+	stop_docker
+}
+
+@test "token discovery should be working properly" {
+	start_docker 2
+
+	TOKEN=$(swarm create)
+	[ "$status" -eq 0 ]
+	[[ ${TOKEN} =~ ^[0-9a-f]{32}$ ]]
+
+	swarm_manage token://$TOKEN
+	swarm_join   token://$TOKEN
+
+	run docker_swarm info
+	[[ "${lines[3]}" == *"Nodes: 2"* ]]
+
+	token_cleanup $TOKEN
+}