Stub /tmp_docker dir to prevent shelling out during spec test

spec tests now pass

Author: canihavethisone

spec/classes/compose_spec.rb

@@ -2,6 +2,20 @@
 
 require 'spec_helper'
 
+# Stub /tmp_docker dir to prevent shelling out during spec test
+class Dir
+  class << self
+    alias_method :old_exist, :exist?
+    def exist? (var)
+      if var == '/tmp_docker'
+        return true
+      else
+        old_exist (var)
+      end
+    end
+  end
+end
+
 tests = {
   'with default valus' => {
   },