Hiding the View Differences button when a wiki page's history only has one version.

Patch contributed by Chaoqun Zou (#1743)


git-svn-id: http://redmine.rubyforge.org/svn/trunk@1749 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/history.rhtml

@@ -30,6 +30,6 @@
 <% end %>
 </tbody>
 </table>
-<%= submit_tag l(:label_view_diff), :class => 'small' %>
+<%= submit_tag l(:label_view_diff), :class => 'small' if show_diff %>
 <span class="pagination"><%= pagination_links_full @version_pages, @version_count, :page_param => :p %></span>
 <% end %>

test/functional/wiki_controller_test.rb

@@ -109,6 +109,16 @@ class WikiControllerTest < Test::Unit::TestCase
     assert_template 'history'
     assert_not_nil assigns(:versions)
     assert_equal 3, assigns(:versions).size
+    assert_select "input[type=submit][name=commit]"
+  end
+
+  def test_history_with_one_version
+    get :history, :id => 1, :page => 'Another_page'
+    assert_response :success
+    assert_template 'history'
+    assert_not_nil assigns(:versions)
+    assert_equal 1, assigns(:versions).size
+    assert_select "input[type=submit][name=commit]", false
   end
 
   def test_diff