support/testing: new python-pydantic runtime test

While in theory, the fastapi tests finds problems with the pydantic
package, it's not obvious that this test should be run when the pydantic
package is updated.

Add a new test that just covers pydantic.

Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

support/testing/tests/package/sample_python_pydantic.py

@@ -0,0 +1,32 @@
+from datetime import datetime
+
+from pydantic import BaseModel, PositiveInt
+
+
+class User(BaseModel):
+    id: int
+    name: str = "John Doe"
+    signup_ts: datetime | None
+    tastes: dict[str, PositiveInt]
+
+
+external_data = {
+    "id": 123,
+    "signup_ts": "2019-06-01 12:22",
+    "tastes": {
+        "wine": 9,
+        b"cheese": 7,
+        "cabbage": "1",
+    },
+}
+
+user = User(**external_data)
+expected_user_dump = {
+    "id": 123,
+    "name": "John Doe",
+    "signup_ts": datetime(2019, 6, 1, 12, 22),
+    "tastes": {"wine": 9, "cheese": 7, "cabbage": 1},
+}
+
+assert user.id == 123
+assert user.model_dump() == expected_user_dump