add empty test for embedding

tests/test_embed.py

@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+import unittest
+
+
+class EmbedTest(unittest.TestCase):
+    def test_embed_function(self) -> None:
+        self.assertEqual(0, 0)
+
+
+if __name__ == "__main__":
+    unittest.main()