Test that passing nil member of array in conditions retrieves records with nil

value on a selected field.

activerecord/test/cases/finder_test.rb

@@ -1045,6 +1045,28 @@ def test_find_with_order_on_included_associations_with_construct_finder_sql_for_
                               :order => ' author_addresses_authors.id DESC ', :limit => 3).size
   end
 
+  def test_find_with_nil_inside_set_passed_for_attribute
+    client_of = Company.find(
+      :all,
+      :conditions => {
+        :client_of => [2, 1, nil],
+        :name => ['37signals', 'Summit', 'Microsoft'] },
+      :order => 'client_of DESC'
+    ).map { |x| x.client_of }
+
+    assert_equal [2, 1, nil], client_of
+  end
+
+  def test_find_with_nil_inside_set_passed_for_attribute
+    client_of = Company.find(
+      :all,
+      :conditions => { :client_of => [nil] },
+      :order => 'client_of DESC'
+    ).map { |x| x.client_of }
+
+    assert_equal [nil], client_of
+  end
+
   def test_with_limiting_with_custom_select
     posts = Post.find(:all, :include => :author, :select => ' posts.*, authors.id as "author_id"', :limit => 3, :order => 'posts.id')
     assert_equal 3, posts.size