Refactor: use SecretStr for Petals llms (#15121)

libs/community/tests/integration_tests/llms/test_petals.py

@@ -1,8 +1,26 @@
 """Test Petals API wrapper."""
 
+from langchain_core.pydantic_v1 import SecretStr
+from pytest import CaptureFixture
+
 from langchain_community.llms.petals import Petals
 
 
+def test_api_key_is_string() -> None:
+    llm = Petals(huggingface_api_key="secret-api-key")
+    assert isinstance(llm.huggingface_api_key, SecretStr)
+
+
+def test_api_key_masked_when_passed_via_constructor(
+    capsys: CaptureFixture,
+) -> None:
+    llm = Petals(huggingface_api_key="secret-api-key")
+    print(llm.huggingface_api_key, end="")
+    captured = capsys.readouterr()
+
+    assert captured.out == "**********"
+
+
 def test_gooseai_call() -> None:
     """Test valid call to gooseai."""
     llm = Petals(max_new_tokens=10)