Merge branch '2-0-stable'

* 2-0-stable:
  adding a test for the dot visitor

Manifest.txt

@@ -107,6 +107,7 @@ test/test_select_manager.rb
 test/test_table.rb
 test/test_update_manager.rb
 test/visitors/test_depth_first.rb
+test/visitors/test_dot.rb
 test/visitors/test_join_sql.rb
 test/visitors/test_mysql.rb
 test/visitors/test_oracle.rb

lib/arel/nodes/node.rb

@@ -9,7 +9,7 @@ module Arel
       # Factory method to create a Nodes::Not node that has the recipient of
       # the caller as a child.
       def not
-        Nodes::Not.new self
+        Nodes::Not.new Nodes::Grouping.new self
       end
 
       ###

lib/arel/visitors/dot.rb

@@ -84,9 +84,16 @@ module Arel
         visit_edge o, "attribute"
       end
 
-      def visit_Arel_Nodes_Offset o
-        visit_edge o, "value"
+      def unary o
+        visit_edge o, "expr"
       end
+      alias :visit_Arel_Nodes_Group             :unary
+      alias :visit_Arel_Nodes_Grouping          :unary
+      alias :visit_Arel_Nodes_Having            :unary
+      alias :visit_Arel_Nodes_Not               :unary
+      alias :visit_Arel_Nodes_Offset            :unary
+      alias :visit_Arel_Nodes_On                :unary
+      alias :visit_Arel_Nodes_UnqualifiedColumn :unary
 
       def visit_Arel_Nodes_InsertStatement o
         visit_edge o, "relation"

test/visitors/test_dot.rb

@@ -0,0 +1,27 @@
+require 'helper'
+
+module Arel
+  module Visitors
+    class TestDot < MiniTest::Unit::TestCase
+      def setup
+        @visitor = Visitors::Dot.new
+      end
+
+      # unary ops
+      [
+        Arel::Nodes::Not,
+        Arel::Nodes::Group,
+        Arel::Nodes::On,
+        Arel::Nodes::Grouping,
+        Arel::Nodes::Offset,
+        Arel::Nodes::Having,
+        Arel::Nodes::UnqualifiedColumn,
+      ].each do |klass|
+        define_method("test_#{klass.name.gsub('::', '_')}") do
+          op = klass.new(:a)
+          @visitor.accept op
+        end
+      end
+    end
+  end
+end