Add /post_replacements.json, /posts/1234/replacements.json.

test/functional/post_replacements_controller_test.rb

@@ -0,0 +1,21 @@
+require 'test_helper'
+
+class PostReplacementsControllerTest < ActionController::TestCase
+  context "The post replacements controller" do
+    setup do
+      @user = FactoryGirl.create(:user, can_approve_posts: true)
+      CurrentUser.user = @user
+      CurrentUser.ip_addr = "127.0.0.1"
+
+      @post = FactoryGirl.create(:post)
+      @post_replacement = FactoryGirl.create(:post_replacement, post_id: @post.id)
+    end
+
+    context "index action" do
+      should "render" do
+        get :index, {format: :json}
+        assert_response :success
+      end
+    end
+  end
+end