standard-tests[patch]: test init from env vars (#25983)

libs/standard-tests/langchain_standard_tests/unit_tests/embeddings.py

@@ -1,8 +1,11 @@
+import os
 from abc import abstractmethod
-from typing import Type
+from typing import Tuple, Type
+from unittest import mock
 
 import pytest
 from langchain_core.embeddings import Embeddings
+from langchain_core.pydantic_v1 import SecretStr
 
 from langchain_standard_tests.base import BaseStandardTests
 
@@ -26,3 +29,21 @@ class EmbeddingsUnitTests(EmbeddingsTests):
     def test_init(self) -> None:
         model = self.embeddings_class(**self.embedding_model_params)
         assert model is not None
+
+    @property
+    def init_from_env_params(self) -> Tuple[dict, dict, dict]:
+        """Return env vars, init args, and expected instance attrs for initializing
+        from env vars."""
+        return {}, {}, {}
+
+    def test_init_from_env(self) -> None:
+        env_params, embeddings_params, expected_attrs = self.init_from_env_params
+        if env_params:
+            with mock.patch.dict(os.environ, env_params):
+                model = self.embeddings_class(**embeddings_params)
+            assert model is not None
+            for k, expected in expected_attrs.items():
+                actual = getattr(model, k)
+                if isinstance(actual, SecretStr):
+                    actual = actual.get_secret_value()
+                assert actual == expected