1 files changed, 15 insertions, 0 deletions
diff --git a/activesupport/test/dependencies_test.rb b/activesupport/test/dependencies_test.rb
index f043bbd438..f969a30891 100644
--- a/activesupport/test/dependencies_test.rb
+++ b/activesupport/test/dependencies_test.rb
@@ -372,4 +372,19 @@ class DependenciesTest < Test::Unit::TestCase
     end
   end
   
+  def test_removal_from_tree_should_be_detected
+    with_loading 'dependencies' do
+      root = Dependencies.autoload_paths.first
+      c = ServiceOne
+      Dependencies.clear
+      assert ! defined?(ServiceOne)
+      begin
+        Dependencies.load_missing_constant(c, :FakeMissing)
+        flunk "Expected exception"
+      rescue ArgumentError => e
+        assert_match %r{ServiceOne has been removed from the module tree}i, e.message
+      end
+    end
+  end
+  
 end