add missing test file.

Author: gali-leilei

libs/miroflow-contrib/tests/test_demo.py

@@ -1,8 +1,6 @@
 # SPDX-FileCopyrightText: 2025 MiromindAI
-# SPDX-FileCopyrightText: 2025 OpenAI
 #
 # SPDX-License-Identifier: Apache-2.0
-# SPDX-License-Identifier: MIT
 
 
 def test_hello():

libs/miroflow/tests/test_demo.py

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2025 MiromindAI
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+def test_hello():
+    assert 1 + 2 == 3, "just a demo"
+
+
+def test_hello_2():
+    assert 2 + 3 == 5, "just another demo"