Move 3rd party CLI out of fixtures

middleman-core/features/3rd_party_cli.feature

@@ -1,5 +1,15 @@
 Feature: Allow config.rb and extensions to add CLI commands
-  Scenario: Test 3rd Party Command
-    Given a fixture app "3rd-party-command"
+
+  Scenario: Command autoloaded from tasks/ directory
+    Given an empty app
+    And a file named "tasks/hello_task.rb" with:
+      """
+      class Hello < Thor
+        desc "hello", "Say hello"
+        def hello
+          puts "Hello World"
+        end
+      end
+      """
     When I run `middleman hello`
     Then the output should contain "Hello World"

middleman-core/fixtures/3rd-party-command/tasks/hello_task.rb

@@ -1,6 +0,0 @@
-class Hello < Thor
-  desc "hello", "Say hello"
-  def hello
-    puts "Hello World"
-  end
-end

middleman-core/lib/middleman-core/step_definitions/builder_steps.rb

@@ -7,6 +7,11 @@ Given /^app "([^\"]*)" is using config "([^\"]*)"$/ do |path, config_name|
   FileUtils.cp(config_path, config_dest)
 end
 
+Given /^an empty app$/ do
+  step %Q{a directory named "empty_app"}
+  step %Q{I cd to "empty_app"}
+end
+
 Given /^a fixture app "([^\"]*)"$/ do |path|
   # This step can be reentered from several places but we don't want
   # to keep re-copying and re-cd-ing into ever-deeper directories