require dsl with default require, but make include optional

lib/sshkit/all.rb

@@ -10,6 +10,7 @@
 require_relative 'coordinator'
 
 require_relative 'deprecation_logger'
+require_relative 'dsl'
 
 require_relative 'exception'
 
@@ -35,4 +36,4 @@
 require_relative 'backends/printer'
 require_relative 'backends/netssh'
 require_relative 'backends/local'
-require_relative 'backends/skipper'
+require_relative 'backends/skipper'

lib/sshkit/dsl.rb

@@ -13,5 +13,3 @@ def run_locally(&block)
   end
 
 end
-
-include SSHKit::DSL

test/unit/test_dsl.rb

@@ -0,0 +1,26 @@
+require 'helper'
+
+module SSHKit
+
+  class TestDSL < UnitTest
+    include SSHKit::DSL
+
+    def test_dsl_on
+      coordinator = mock
+      Coordinator.stubs(:new).returns coordinator
+      coordinator.expects(:each).at_least_once
+
+      on('1.2.3.4')
+    end
+
+    def test_dsl_run_locally
+      local_backend = mock
+      Backend::Local.stubs(:new).returns local_backend
+      local_backend.expects(:run).at_least_once
+
+      run_locally
+    end
+
+  end
+
+end