Move package into src
Prevents accidental imports when running tests.
diff --git a/tests/test_util.py b/tests/test_util.py
new file mode 100644
index 0000000..2aaded2
--- /dev/null
+++ b/tests/test_util.py
@@ -0,0 +1,19 @@
+from OpenSSL._util import exception_from_error_queue, lib
+
+from .util import TestCase
+
+
+class ErrorTests(TestCase):
+ """
+ Tests for handling of certain OpenSSL error cases.
+ """
+ def test_exception_from_error_queue_nonexistent_reason(self):
+ """
+ :py:func:`exception_from_error_queue` raises ``ValueError`` when it
+ encounters an OpenSSL error code which does not have a reason string.
+ """
+ lib.ERR_put_error(lib.ERR_LIB_EVP, 0, 1112, b"", 10)
+ exc = self.assertRaises(
+ ValueError, exception_from_error_queue, ValueError
+ )
+ self.assertEqual(exc.args[0][0][2], "")