chore: import upstream snapshot with attribution

tests/models/test_openai_client_utils.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import pytest
+
+from agents.models.openai_client_utils import (
+    is_official_openai_base_url,
+    is_official_openai_client,
+)
+
+
+@pytest.mark.parametrize(
+    "base_url",
+    [
+        "https://api.openai.com",
+        "https://api.openai.com/v1/",
+    ],
+)
+def test_official_openai_base_url_matches_exact_host(base_url: str) -> None:
+    assert is_official_openai_base_url(base_url) is True
+
+
+@pytest.mark.parametrize(
+    "base_url",
+    [
+        "https://api.openai.com.evil/v1/",
+        "https://api.openai.com.proxy.local/v1/",
+        "http://api.openai.com/v1/",
+        "https://custom.example.test/v1/",
+    ],
+)
+def test_official_openai_base_url_rejects_non_openai_hosts(base_url: str) -> None:
+    assert is_official_openai_base_url(base_url) is False
+
+
+def test_official_openai_websocket_base_url_matches_exact_host() -> None:
+    assert is_official_openai_base_url("wss://api.openai.com/v1/", websocket=True) is True
+    assert (
+        is_official_openai_base_url("wss://api.openai.com.proxy.local/v1/", websocket=True) is False
+    )
+
+
+def test_official_openai_client_rejects_client_without_base_url() -> None:
+    assert is_official_openai_client(object()) is False  # type: ignore[arg-type]