1 files changed, 15 insertions, 0 deletions
diff --git a/railties/test/generators/actions_test.rb b/railties/test/generators/actions_test.rb
index fabba555ef..b4fbea4af4 100644
--- a/railties/test/generators/actions_test.rb
+++ b/railties/test/generators/actions_test.rb
@@ -235,6 +235,21 @@ class ActionsTest < Rails::Generators::TestCase
     assert_file 'config/routes.rb', /#{Regexp.escape(route_command)}/
   end
 
+  def test_route_should_be_idempotent
+    run_generator
+    route_path = File.expand_path('config/routes.rb', destination_root)
+
+    # runs first time, not asserting
+    action :route, "root 'welcome#index'"
+    content_1 = File.read(route_path)
+
+    # runs second time
+    action :route, "root 'welcome#index'"
+    content_2 = File.read(route_path)
+
+    assert_equal content_1, content_2
+  end
+
   def test_route_should_add_data_with_an_new_line
     run_generator
     action :route, "root 'welcome#index'"