Add ActionController::Renderer

Render arbitrary templates outside of controller actions

1 files changed, 99 insertions, 0 deletions

diff --git a/actionpack/test/controller/renderer_test.rb b/actionpack/test/controller/renderer_test.rb
new file mode 100644
index 0000000000..6efc9c8dfd
--- /dev/null
+++ b/actionpack/test/controller/renderer_test.rb
@@ -0,0 +1,99 @@
+require 'abstract_unit'
+
+class RendererTest < ActiveSupport::TestCase
+  test 'creating with a controller' do
+    controller = CommentsController
+    renderer   = ActionController::Renderer.for controller
+
+    assert_equal controller, renderer.controller
+  end
+
+  test 'creating from a controller' do
+    controller = AccountsController
+    renderer   = controller.renderer
+
+    assert_equal controller, renderer.controller
+  end
+
+  test 'rendering with a class renderer' do
+    renderer = ApplicationController.renderer
+    content  = renderer.render template: 'ruby_template'
+
+    assert_equal 'Hello from Ruby code', content
+  end
+
+  test 'rendering with an instance renderer' do
+    renderer = ApplicationController.renderer.new
+    content  = renderer.render file: 'test/hello_world'
+
+    assert_equal 'Hello world!', content
+  end
+
+  test 'rendering with locals' do
+    renderer = ApplicationController.renderer
+    content  = renderer.render template: 'test/render_file_with_locals',
+                               locals: { secret: 'bar' }
+
+    assert_equal "The secret is bar\n", content
+  end
+
+  test 'rendering with assigns' do
+    renderer = ApplicationController.renderer
+    content  = renderer.render template: 'test/render_file_with_ivar',
+                               assigns: { secret: 'foo' }
+
+    assert_equal "The secret is foo\n", content
+  end
+
+  test 'rendering with custom env' do
+    renderer = ApplicationController.renderer.new method: 'post'
+    content  = renderer.render inline: '<%= request.post? %>'
+
+    assert_equal 'true', content
+  end
+
+  test 'rendering with defaults' do
+    renderer = ApplicationController.renderer
+    renderer.defaults[:https] = true
+    content = renderer.render inline: '<%= request.ssl? %>'
+
+    assert_equal 'true', content
+  end
+
+  test 'same defaults from the same controller' do
+    defaults = ->(controller) { controller.renderer.defaults }
+
+    assert defaults[AccountsController].equal? defaults[AccountsController]
+    assert_not defaults[AccountsController].equal? defaults[CommentsController]
+  end
+
+  test 'rendering with different formats' do
+    html = 'Hello world!'
+    xml  = "<p>Hello world!</p>\n"
+
+    assert_equal html, render['respond_to/using_defaults']
+    assert_equal xml,  render['respond_to/using_defaults.xml.builder']
+    assert_equal xml,  render['respond_to/using_defaults', formats: :xml]
+  end
+
+  test 'rendering with helpers' do
+    assert_equal "<p>1\n<br />2</p>", render[inline: '<%= simple_format "1\n2" %>']
+  end
+  
+  test 'rendering from inherited renderer' do
+    inherited = Class.new ApplicationController.renderer do
+      defaults[:script_name] = 'script'
+      def render(options)
+        super options.merge(locals: { param: :value })
+      end
+    end
+
+    template = '<%= url_for controller: :foo, action: :bar, param: param %>'
+    assert_equal 'script/foo/bar?param=value', inherited.render(inline: template)
+  end
+
+  private
+    def render
+      @render ||= ApplicationController.renderer.method(:render)
+    end
+end