Use aruba and clean up test suite

features/rake_clean.feature

@@ -1,6 +1,9 @@
+@disable-bundler
 Feature: Rake works in the suspended project
 
   Scenario: Running rake in the suspended project
+    When I suspend a project called "test_project"
+    And I cd to the "test_project" root
     When I drop and create the required databases
     And I run the rake task "db:create"
     And I run the rake task "db:migrate"
@@ -10,6 +13,7 @@ Feature: Rake works in the suspended project
 
   Scenario: Making a spec then running rake
     When I drop and create the required databases
+    And I suspend a project called "test_project"
     And I generate "model post title:string"
     And I run the rake task "db:migrate"
     And I run the rake task "db:test:prepare"

features/step_definitions/shell.rb

@@ -1,24 +1,44 @@
+require 'aruba/cucumber'
+
+Before do
+  @aruba_timeout_seconds = 60
+end
+
+After do
+  FileUtils.rm_rf('test_project')
+end
+
 When 'I run the rake task "$task_name"' do |task_name|
-  Dir.chdir('test_project') do
-    system("rake #{task_name}")
+  in_current_dir do
+    run "bundle exec rake #{task_name}"
   end
 end
 
 When 'I generate "$generator_with_args"' do |generator_with_args|
-  Dir.chdir('test_project') do
-    system("rails generate #{generator_with_args}")
+  in_current_dir do
+    run "bundle exec rails generate #{generator_with_args}"
   end
 end
 
 Then 'I see a successful response in the shell' do
-  $?.to_i.should == 0
+  assert_exit_status(0)
 end
 
 When 'I drop and create the required databases' do
-  Dir.chdir('test_project') do
-    system("rake db:drop RAILS_ENV=test")
-    system("rake db:drop")
-    system("rake db:create RAILS_ENV=test")
-    system("rake db:create")
+  in_current_dir do
+    run 'bundle exec rake db:drop RAILS_ENV=test'
+    run 'bundle exec rake db:drop'
+    run 'bundle exec rake db:create RAILS_ENV=test'
+    run 'bundle exec rake db:create'
   end
 end
+
+When 'I suspend a project called "$project_name"' do |project_name|
+  suspenders_bin = File.expand_path(File.join('..', '..', 'bin', 'suspenders'), File.dirname(__FILE__))
+  run "#{suspenders_bin} #{project_name}"
+  assert_exit_status(0)
+end
+
+When 'I cd to the "$test_project" root' do |dirname|
+  cd dirname
+end