Checking if a box already exists at the checking middleware

lib/vagrant/action/vm/check.rb

@@ -0,0 +1,21 @@
+module Vagrant
+  class Action
+    module VM
+      class Check
+        def initialize(app, env)
+          @app = app
+        end
+        
+        def call(env)
+          box_name = env["config"].vm.box
+
+          env.logger.info "Checking if the box '#{box_name}' was already downloaded"
+          
+          box = Vagrant::Box.find(env.env , box_name)
+          env.logger.info "The box #{box} were found"
+          @app.call(env)
+        end
+      end
+    end
+  end
+end

test/vagrant/action/vm/check_test.rb

@@ -0,0 +1,25 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', 'test_helper')
+
+
+class CheckVMActionTest < Test::Unit::TestCase
+  setup do
+    @klass = Vagrant::Action::VM::Check
+    @app, @env = mock_action_data
+    @instance = @klass.new(@app, @env)
+    
+    @env['config'].vm.box = "foo"
+  end 
+  should "check if the box exist" do
+    Vagrant::Box.expects("find").with(@env.env, 'foo')
+    @instance.call(@env)
+  end 
+
+  
+  should 'continue the chain process' do
+    Vagrant::Box.stubs('find').with(@env.env, 'foo')
+    @app.expects(:call).with(@env).once
+    @instance.call(@env)
+  end   
+  
+end 
+