Spec for custom and default renderers

Author: bquorning

example_app_generator/app/views/foo.html

@@ -0,0 +1 @@
+Empty template

example_app_generator/app/views/some_templates/bar.html

@@ -0,0 +1 @@
+Empty template

example_app_generator/generate_stuff.rb

@@ -14,6 +14,9 @@ def setup_tasks
 
     def final_tasks
       copy_file 'spec/verify_active_record_spec.rb'
+      copy_file 'app/views/foo.html'
+      copy_file 'app/views/some_templates/bar.html'
+      copy_file 'spec/verify_custom_renderers_spec.rb'
       copy_file 'spec/verify_fixture_warning_spec.rb'
       run('bin/rake db:migrate')
       if ::Rails::VERSION::STRING.to_f < 4.1

example_app_generator/spec/verify_custom_renderers_spec.rb

@@ -0,0 +1,79 @@
+require 'rails_helper'
+
+RSpec.describe "template rendering", :type => :controller do
+  context 'with the standard renderers' do
+    controller do
+      def index
+        render :template => :foo
+      end
+    end
+
+    it "renders the 'foo' template" do
+      get :index
+
+      expect(response).to render_template(:foo)
+    end
+  end
+
+  context 'with a String path prepended to the view path' do
+    controller do
+      def index
+        prepend_view_path('app/views/some_templates')
+
+        render :template => :bar
+      end
+    end
+
+    it "renders the 'bar' template" do
+      get :index
+
+      expect(response).to render_template(:bar)
+    end
+  end
+
+  context 'with a custom renderer prepended to the view path' do
+    controller do
+      def index
+        prepend_view_path(MyResolver.new)
+
+        render :template => :baz
+      end
+    end
+
+    it "renders the 'baz' template" do
+      get :index
+
+      expect(response).to render_template(:baz)
+    end
+  end
+
+  class MyResolver < ActionView::Resolver
+    def find_all(*args)
+      find_templates(*args)
+    end
+
+    def find_all_anywhere(*args)
+      find_templates(*args)
+    end
+
+    private
+
+    def find_templates(name, prefix = nil, partial = false, details = {}, key = nil, locals = [])
+      name.prepend("_") if partial
+      path = [prefix, name].compact.join("/")
+      template = find_template(name, path)
+
+      [template]
+    end
+
+    def find_template(name, path)
+      ActionView::Template.new(
+        "",
+        name,
+        lambda { |_template| %("") },
+        :virtual_path => path,
+        :format => :html
+      )
+    end
+  end
+end