1 files changed, 51 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb
new file mode 100644
index 0000000000..3d11f1001f
--- /dev/null
+++ b/activesupport/test/core_ext/module_test.rb
@@ -0,0 +1,51 @@
+require 'test/unit'
+require File.dirname(__FILE__) + '/../../lib/active_support/core_ext/class'
+require File.dirname(__FILE__) + '/../../lib/active_support/core_ext/module'
+
+module One
+end
+
+class Ab
+  include One
+end
+
+module Xy
+  class Bc
+    include One
+  end
+end
+
+module Yz
+  module Zy
+    class Cd
+      include One
+    end
+  end
+end
+
+class De
+end
+
+class ModuleTest < Test::Unit::TestCase
+  def test_included_in_classes
+    assert One.included_in_classes.include?(Ab)
+    assert One.included_in_classes.include?(Xy::Bc)
+    assert One.included_in_classes.include?(Yz::Zy::Cd)
+    assert !One.included_in_classes.include?(De)
+  end
+
+  def test_remove_classes_including
+    assert Ab.is_a?(Class)
+    assert Xy::Bc.is_a?(Class)
+    assert Yz::Zy::Cd.is_a?(Class)
+    assert De.is_a?(Class)
+
+    One.remove_classes_including
+
+    assert_raises(NameError) { Ae.is_a?(Class) }
+    assert_raises(NameError) { Xy::Bc.is_a?(Class) }
+    assert_raises(NameError) { Yz::Zy::Cd.is_a?(Class) }
+    
+    assert De.is_a?(Class)
+  end
+end
+\ No newline at end of file