Add tests for reverting to foreign versions.

test/functional/artist_commentaries_controller_test.rb

@@ -0,0 +1,36 @@
+require 'test_helper'
+
+class ArtistCommentariesControllerTest < ActionController::TestCase
+  context "The artist commentaries controller" do
+    setup do
+      @user = FactoryGirl.create(:user)
+      CurrentUser.user = @user
+      CurrentUser.ip_addr = "127.0.0.1"
+    end
+
+    teardown do
+      CurrentUser.user = nil
+    end
+
+    context "revert action" do
+      setup do
+        @commentary1 = FactoryGirl.create(:artist_commentary)
+        @commentary2 = FactoryGirl.create(:artist_commentary)
+      end
+
+      should "return 404 when trying to revert a nonexistent commentary" do
+        post :revert, { :id => -1, :version_id => -1 }, {:user_id => @user.id}
+
+        assert_response 404
+      end
+
+      should "not allow reverting to a previous version of another artist commentary" do
+        post :revert, { :id => @commentary1.post_id, :version_id => @commentary2.versions(true).first.id }, {:user_id => @user.id}
+        @commentary1.reload
+
+        assert_not_equal(@commentary1.original_title, @commentary2.original_title)
+        assert_response :missing
+      end
+    end
+  end
+end