More test improvements

features/step_definitions/jekyll_steps.rb

@@ -1,5 +1,3 @@
-include Test::Unit::Assertions
-
 When /^I run Jekyll$/ do
   run_jekyll
 end

features/support/env.rb

@@ -3,7 +3,7 @@ if ENV['CI']
   Coveralls.wear!
 end
 
-require 'test/unit'
+require 'test/unit/assertions'
 require 'jekyll/responsive_image'
 
 TEST_DIR = File.join('/', 'tmp', 'jekyll')
@@ -14,3 +14,5 @@ def run_jekyll(options = {})
   site = Jekyll::Site.new(options)
   site.process
 end
+
+World(Test::Unit::Assertions)

features/test-site/_includes/base-url.html

@@ -1 +1 @@
-<img src="{{ site.baseurl }}/{{ path }}">
+<img src="{{ site.baseurl }}/{{ original.path }}">

features/test-site/_includes/responsive-image.html

@@ -1 +1 @@
-<img alt="{{ alt }}" src="/{{ path }}" title="{{ title }}" srcset="{% for i in resized %}/{{ i.path }} {{ i.width }}w,{% endfor %}/{{ original.path }} {{ original.width }}w">
+<img alt="{{ alt }}" src="/{{ original.path }}" title="{{ title }}" srcset="{% for i in resized %}/{{ i.path }} {{ i.width }}w,{% endfor %}/{{ original.path }} {{ original.width }}w">