test(core): model digest calculation test (#421)

python/tests/test_model.py

@@ -0,0 +1,30 @@
+import unittest
+
+from uagents import Model
+
+
+class TestModelDigest(unittest.TestCase):
+    def test_calculate_digest_backcompat(self):
+        """
+        Test that the digest calculation is consistent with the result from
+        previous versions to ensure backwards compatibility.
+        """
+
+        class SuperImportantCheck(Model):
+            """Plus random docstring"""
+
+            check: bool
+            message: str
+            counter: int
+
+        target_digest = (
+            "model:21e34819ee8106722968c39fdafc104bab0866f1c73c71fd4d2475be285605e9"
+        )
+
+        result = Model.build_schema_digest(SuperImportantCheck)
+
+        self.assertEqual(result, target_digest, "Digest mismatch")
+
+
+if __name__ == "__main__":
+    unittest.main()