diff --git a/lib/delphi/test/TestConstants.pas b/lib/delphi/test/TestConstants.pas
new file mode 100644
index 0000000..9cb85ab
--- /dev/null
+++ b/lib/delphi/test/TestConstants.pas
@@ -0,0 +1,36 @@
+(*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *)
+
+unit TestConstants;
+
+interface
+
+type
+  TKnownProtocol = ( prot_Binary,  // default binary protocol
+                     prot_JSON     // JSON protocol
+                   );
+const
+  KNOWN_PROTOCOLS : array[TKnownProtocol] of string
+                  = ('binary', 'JSON');
+
+implementation
+
+// nothing
+
+end.