--- <OUTPUT_FILE>
+++ <OUTPUT_FILE> (expected)
@@ -1 +1,18 @@
-# Different content
+# generated by datamodel-codegen:
+#   filename:  person.json
+
+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel, Field, conint
+
+
+class Person(BaseModel):
+    firstName: str | None = Field(None, description="The person's first name.")
+    lastName: str | None = Field(None, description="The person's last name.")
+    age: conint(ge=0) | None = Field(
+        None, description='Age in years which must be equal to or greater than zero.'
+    )
+    friends: list[Any] | None = None
+    comment: None = Field(None)
