[24839] Avoid saving nil textile body

.travis.yml

@@ -59,7 +59,7 @@ env:
     - COVERAGE=true
 
   matrix:
-    - "TEST_SUITE=plugins:spec      DB=mysql    GROUP_SIZE=1 GROUP=1"
+    - "TEST_SUITE=plugins:specs      DB=mysql    GROUP_SIZE=1 GROUP=1"
 
     - "TEST_SUITE=npm"
 

app/controllers/my_projects_overviews_controller.rb

@@ -53,12 +53,15 @@ class MyProjectsOverviewsController < ApplicationController
       end
     end
 
-    overview.save_custom_element(block_name, block_title, textile)
+    if overview.save_custom_element(block_name, block_title, textile)
       render(partial: "block_textilizable",
             locals: { project: project,
                       block_title: block_title,
                       block_name: block_name,
                       textile: textile })
+   else
+     render text: t(:error_textile_not_saved), status: 400
+   end
   end
 
   # Add a block to user's page

app/models/my_projects_overview.rb

@@ -59,7 +59,9 @@ class MyProjectsOverview < ActiveRecord::Base
 
   def save_custom_element(name, title, new_content)
     el = custom_elements.detect {|x| x.first == name}
-    return unless el
+    return false unless el
+    return false unless title && new_content
+
     el[1] = title
     el[2] = new_content
     save

config/locales/en.yml

@@ -21,6 +21,7 @@
 en:
   button_edit_this_page: "Edit this page"
   error_saving_changes: "The changes could not be saved: %{errors}"
+  error_textile_not_saved: "The textile block could not be saved."
   label_hidden_elements: "Hidden elements"
   label_visible_elements: "Visible elements"
   label_project_description: "Project description"