chore(*): Allow testing against CoreOS alpha

Allow testing the against the CoreOS alpha channel.
Fixes #2420

Author: johanneswuerbach

Vagrantfile

@@ -14,7 +14,7 @@ CONFIG = File.join(File.dirname(__FILE__), "config.rb")
 
 # Defaults for config options defined in CONFIG
 $num_instances = 1
-$update_channel = "stable"
+$update_channel = ENV["COREOS_CHANNEL"] || "stable"
 $enable_serial_logging = false
 $vb_gui = false
 $vb_memory = 1024

tests/bin/test-latest.sh

@@ -1,13 +1,17 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Preps a test environment and runs `make test-integration`
 # using the latest published artifacts available on Docker Hub
 # and the deis.io website.
 #
+# Usage: ./test-latest.sh [COREOS_CHANNEL]
+#
 
 # fail on any command exiting non-zero
 set -eo pipefail
 
+export COREOS_CHANNEL=${1:-stable}
+
 # absolute path to current directory
 export THIS_DIR=$(cd $(dirname $0); pwd)