add possibility to stub only selected providers

devops-service/app/devops-api2.rb

@@ -39,7 +39,7 @@ module Devops
         Devops::Api2.settings.mongo.create_root_user
         ::Provider::ProviderFactory.init(config)
 
-        Stubber.stub_providers! if config[:stub_classes]
+        Stubber.stub_providers!(config[:stub_providers])
       end
 
       def routes

devops-service/config.rb

@@ -40,4 +40,7 @@ config[:static_ssh_key]   = "ssh_key" # or nil
 config[:static_certificate]   = "/path/to/.ssh/static.pem"
 
 config[:debug] = true
-config[:stub_classes] = true
+
+# set it to :all or [:ec2] to stub calls to selected providers
+#  or to false to disable stubbing
+config[:stub_providers] = false

devops-service/lib/stubber.rb

@@ -1,5 +1,11 @@
 module Stubber
-  def self.stub_providers!
-    Dir["tests/stubs/providers/*.rb"].each {|file| require file }
+  def self.stub_providers!(providers)
+    return unless providers
+
+    providers = [:ec2, :openstack] if providers == :all
+    providers.each do |provider|
+      next unless [:ec2, :openstack].include?(provider)
+      require "tests/stubs/providers/#{provider}.rb"
+    end
   end
 end