1 files changed, 38 insertions, 0 deletions
diff --git a/activesupport/test/constantize_test_cases.rb b/activesupport/test/constantize_test_cases.rb
new file mode 100644
index 0000000000..135f894056
--- /dev/null
+++ b/activesupport/test/constantize_test_cases.rb
@@ -0,0 +1,38 @@
+module Ace
+  module Base
+    class Case
+    end
+  end
+end
+
+module ConstantizeTestCases
+  def run_constantize_tests_on
+    assert_nothing_raised { assert_equal Ace::Base::Case, yield("Ace::Base::Case") }
+    assert_nothing_raised { assert_equal Ace::Base::Case, yield("::Ace::Base::Case") }
+    assert_nothing_raised { assert_equal ConstantizeTestCases, yield("ConstantizeTestCases") }
+    assert_nothing_raised { assert_equal ConstantizeTestCases, yield("::ConstantizeTestCases") }
+    assert_raise(NameError) { yield("UnknownClass") }
+    assert_raise(NameError) { yield("UnknownClass::Ace") }
+    assert_raise(NameError) { yield("UnknownClass::Ace::Base") }
+    assert_raise(NameError) { yield("An invalid string") }
+    assert_raise(NameError) { yield("InvalidClass\n") }
+    assert_raise(NameError) { yield("Ace::ConstantizeTestCases") }
+    assert_raise(NameError) { yield("Ace::Base::ConstantizeTestCases") }
+  end
+
+  def run_safe_constantize_tests_on
+    assert_nothing_raised { assert_equal Ace::Base::Case, yield("Ace::Base::Case") }
+    assert_nothing_raised { assert_equal Ace::Base::Case, yield("::Ace::Base::Case") }
+    assert_nothing_raised { assert_equal ConstantizeTestCases, yield("ConstantizeTestCases") }
+    assert_nothing_raised { assert_equal ConstantizeTestCases, yield("::ConstantizeTestCases") }
+    assert_nothing_raised { assert_equal nil, yield("UnknownClass") }
+    assert_nothing_raised { assert_equal nil, yield("UnknownClass::Ace") }
+    assert_nothing_raised { assert_equal nil, yield("UnknownClass::Ace::Base") }
+    assert_nothing_raised { assert_equal nil, yield("An invalid string") }
+    assert_nothing_raised { assert_equal nil, yield("InvalidClass\n") }
+    assert_nothing_raised { assert_equal nil, yield("blargle") }
+    assert_nothing_raised { assert_equal nil, yield("Ace::ConstantizeTestCases") }
+    assert_nothing_raised { assert_equal nil, yield("Ace::Base::ConstantizeTestCases") }
+    assert_nothing_raised { assert_equal nil, yield("#<Class:0x7b8b718b>::Nested_1") }
+  end
+end