chore: import upstream snapshot with attribution

tests/test_optional_deps.py

@@ -0,0 +1,26 @@
+"""Tests for the optional-dependency extras declared in pyproject.toml."""
+
+from __future__ import annotations
+
+import tomllib
+from pathlib import Path
+
+
+PYPROJECT = Path(__file__).resolve().parent.parent / "pyproject.toml"
+
+
+def _optional_dependencies() -> dict[str, list[str]]:
+    data = tomllib.loads(PYPROJECT.read_text(encoding="utf-8"))
+    return data["project"]["optional-dependencies"]
+
+
+def test_vertex_extra_pins_google_auth() -> None:
+    extras = _optional_dependencies()
+    assert "vertex" in extras
+    assert any(req.startswith("google-auth") for req in extras["vertex"])
+
+
+def test_bedrock_extra_pins_boto3() -> None:
+    extras = _optional_dependencies()
+    assert "bedrock" in extras
+    assert any(req.startswith("boto3") for req in extras["bedrock"])