1 files changed, 37 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/class_test.rb b/activesupport/test/core_ext/class_test.rb
new file mode 100644
index 0000000000..6e956fa45d
--- /dev/null
+++ b/activesupport/test/core_ext/class_test.rb
@@ -0,0 +1,37 @@
+require 'test/unit'
+require File.dirname(__FILE__) + '/../../lib/active_support/core_ext/class'
+
+class A
+end
+
+module X
+  class B
+  end
+end
+
+module Y
+  module Z
+    class C
+    end
+  end
+end
+
+class ClassTest < Test::Unit::TestCase
+  def test_removing_class_in_root_namespace
+    assert A.is_a?(Class)
+    Class.remove_class(A)
+    assert_raises(NameError) { A.is_a?(Class) }
+  end
+
+  def test_removing_class_in_one_level_namespace
+    assert X::B.is_a?(Class)
+    Class.remove_class(X::B)
+    assert_raises(NameError) { X::B.is_a?(Class) }
+  end
+
+  def test_removing_class_in_two_level_namespace
+    assert Y::Z::C.is_a?(Class)
+    Class.remove_class(Y::Z::C)
+    assert_raises(NameError) { Y::Z::C.is_a?(Class) }
+  end
+end