move backend creation to profile context

keeping it in the runner will create conflicts with rspec runners

lib/vulcano/profile_context.rb

@@ -4,6 +4,7 @@
 
 require 'vulcano/rule'
 require 'vulcano/dsl'
+require 'train'
 
 module Vulcano
   class ProfileContext
@@ -140,5 +141,36 @@ module Vulcano
       end
       # rubocop:enable all
     end
+
+    # Create the transport backend with aggregated resources.
+    #
+    # @param [Hash] config for the transport backend
+    # @return [Transport] enriched transport instance
+    def self.create_backend(config)
+      conf = Train.target_config(config)
+      name = conf[:backend] || :local
+      transport = Train.create(name, conf)
+      if transport.nil?
+        fail "Can't find transport backend '#{name}'."
+      end
+
+      connection = transport.connection
+      if connection.nil?
+        fail "Can't connect to transport backend '#{name}'."
+      end
+
+      cls = Class.new do
+        define_method :backend do
+          connection
+        end
+        Vulcano::Resource.registry.each do |id, r|
+          define_method id.to_sym do |*args|
+            r.new(self, id.to_s, *args)
+          end
+        end
+      end
+
+      cls.new
+    end
   end
 end

lib/vulcano/runner.rb

@@ -5,7 +5,6 @@
 # author: Christoph Hartmann
 
 require 'uri'
-require 'train'
 require 'vulcano/targets'
 require 'vulcano/profile_context'
 # spec requirements
@@ -38,35 +37,8 @@ module Vulcano
       RSpec.configuration.add_formatter(@conf['format'] || 'progress')
     end
 
-    def self.create_backend(config)
-      conf = Train.target_config(config)
-      name = conf[:backend] || :local
-      transport = Train.create(name, conf)
-      if transport.nil?
-        fail "Can't find transport backend '#{name}'."
-      end
-
-      connection = transport.connection
-      if connection.nil?
-        fail "Can't connect to transport backend '#{name}'."
-      end
-
-      cls = Class.new do
-        define_method :backend do
-          connection
-        end
-        Vulcano::Resource.registry.each do |id, r|
-          define_method id.to_sym do |*args|
-            r.new(self, id.to_s, *args)
-          end
-        end
-      end
-
-      cls.new
-    end
-
     def configure_transport
-      @backend = self.class.create_backend(@conf)
+      @backend = ProfileContext.create_backend(@conf)
     end
 
     def add_tests(tests)

test/helper.rb

@@ -14,7 +14,7 @@ SimpleCov.start do
 end
 
 require 'vulcano/resource'
-require 'train'
+require 'vulcano/profile_context'
 
 class MockLoader
   # pass the os identifier to emulate a specific operating system
@@ -47,8 +47,11 @@ class MockLoader
     scriptpath = ::File.realpath(::File.dirname(__FILE__))
 
     # create mock backend
-    @backend = Train.create('mock')
+    @backend = Vulcano::ProfileContext.create_backend({ backend: :mock })
-    mock = @backend.connection
+    mock = @backend.backend
+
+    # set os emulation
+    mock.mock_os(@os)
 
     # create all mock files
     local = Train.create('local').connection
@@ -92,11 +95,11 @@ class MockLoader
     # create all mock commands
     cmd = lambda {|x|
       stdout = ::File.read(::File.join(scriptpath, '/unit/mock/cmd/'+x))
-      mock.mock_command(stdout, '', 0)
+      mock.mock_command('', stdout, '', 0)
     }
 
     empty = lambda {
-      mock.mock_command('', '', 0)
+      mock.mock_command('', '', '', 0)
     }
 
     mock.commands = {
@@ -179,9 +182,6 @@ class MockLoader
       'iptables  -S' => cmd.call('iptables-s'),
     }
 
-    # set os emulation
-    mock.os = @os
-
     @backend
   end