Ask user what to do with child pages when deleting a parent wiki page (#3202).

3 options are available:
* move child pages as root pages
* move child pages to another parent page
* delete all descendants

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2676 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/wiki_page_test.rb

@@ -100,4 +100,18 @@ class WikiPageTest < Test::Unit::TestCase
     assert WikiContent.find_all_by_page_id(1).empty?
     assert WikiContent.versioned_class.find_all_by_page_id(1).empty?
   end
+  
+  def test_destroy_should_not_nullify_children
+    page = WikiPage.find(2)
+    child_ids = page.child_ids
+    assert child_ids.any?
+    page.destroy
+    assert_nil WikiPage.find_by_id(2)
+    
+    children = WikiPage.find_all_by_id(child_ids)
+    assert_equal child_ids.size, children.size
+    children.each do |child|
+      assert_nil child.parent_id
+    end
+  end
 end