add basic user revert functionality

test/unit/user_revert_test.rb

@@ -0,0 +1,47 @@
+require 'test_helper'
+
+class UserRevertTest < ActiveSupport::TestCase
+  context "Reverting a user's changes" do
+    setup do
+      @creator = FactoryGirl.create(:user)
+      @user = FactoryGirl.create(:user)
+      CurrentUser.user = @user
+      CurrentUser.ip_addr = "127.0.0.1"
+
+      CurrentUser.scoped(@creator) do
+        @parent = FactoryGirl.create(:post)
+        @post = FactoryGirl.create(:post, :tag_string => "aaa bbb ccc", :rating => "q", :source => "xyz")
+      end
+
+      @post.stubs(:merge_version?).returns(false)
+      @post.update_attributes(:tag_string => "bbb ccc xxx", :source => "", :rating => "e")
+    end
+
+    teardown do
+      CurrentUser.user = nil
+      CurrentUser.ip_addr = nil
+    end
+
+    subject { UserRevert.new(@user.id) }
+
+    should "have the correct data" do
+      assert_equal("bbb ccc xxx", @post.tag_string)
+      assert_equal("", @post.source)
+      assert_equal("e", @post.rating)
+    end
+
+    context "when processed" do
+      setup do
+        subject.process
+        @post.reload
+      end
+
+      should "revert the user's changes" do
+        assert_equal("aaa bbb ccc", @post.tag_string)
+        assert_equal("xyz", @post.source)
+        assert_equal("q", @post.rating)
+      end
+    end
+
+  end
+end