Added Tests for revise! and fixed a few errors

lib/mongoid/versioning.rb

@@ -59,7 +59,7 @@ def revise
     # @since 2.2.1
     def revise!
       versions.build(
-        (previous_revision || self).versioned_attributes, without_protection: true
+        (previous_revision || self).versioned_attributes
       )
       versions.shift if version_max.present? && versions.length > version_max
       self.version = (version || 1 ) + 1
@@ -127,6 +127,7 @@ def versionless
     def previous_revision
       _loading_revision do
         self.class.unscoped.
+          with(self.mongo_session.options).
           where(_id: id).
           any_of({ version: version }, { version: nil }).first
       end

lib/mongoid/versioning/monkey_patches.rb

@@ -322,29 +322,3 @@ def instantiate(attrs = nil, criteria_instance_id = nil)
     end
   end
 end
-
-module Mongoid
-  module Sessions
-    module ClassMethods
-      # Get the collection for this model from the session. Will check for an
-      # overridden collection name from the store_in macro or the collection
-      # with a pluralized model name.
-      #
-      # @example Get the model's collection.
-      #   Model.collection
-      #
-      # @return [ Moped::Collection ] The collection.
-      #
-      # @since 3.0.0
-      def collection
-        if opts = persistence_options
-          coll = mongo_session.with(opts)[opts[:collection] || collection_name]
-          clear_persistence_options unless validating_with_query? || _loading_revision?
-          coll
-        else
-          mongo_session[collection_name]
-        end
-      end
-    end
-  end
-end

spec/mongoid/versioning_spec.rb

@@ -347,6 +347,20 @@ class WikiPage
         it "does not create a new version" do
           version.should be_nil
         end
+
+        context "and revision is forced" do
+          before do
+            page.revise!
+          end
+
+          it "creates a new version" do
+            version.should_not be_nil
+          end
+
+          it "page version should be valid" do
+            page.version.should eq(2)
+          end
+        end
       end
 
       context "when saving over the number of maximum versions" do