Added a test case
diff --git a/OpenSSL/test/test_util.py b/OpenSSL/test/test_util.py
new file mode 100644
index 0000000..7da386e
--- /dev/null
+++ b/OpenSSL/test/test_util.py
@@ -0,0 +1,10 @@
+from OpenSSL._util import exception_from_error_queue, lib
+from OpenSSL.test.util import TestCase
+
+
+
+class TestErrors(TestCase):
+ def test_exception_from_error_queue_nonexistant_reason(self):
+ lib.ERR_put_error(lib.ERR_LIB_EVP, 0, 1112, "", 10)
+ exc = self.assertRaises(ValueError, exception_from_error_queue, ValueError)
+ self.assertEqual(exc.args[0][0][2], "")