test_zero_vector() — langchain Function Reference

Architecture documentation for the test_zero_vector() function in test_utils.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

LangChainCore→ MessageInterface→ test_zero_vector() — langchain Function Reference

Dependency Diagram

graph TD
  18e741d2_6267_db40_d968_52ab8125d86f["test_zero_vector()"]
  43305d93_a58a_e7db_615b_b8a5a18284ab["TestCosineSimilarity"]
  18e741d2_6267_db40_d968_52ab8125d86f -->|defined in| 43305d93_a58a_e7db_615b_b8a5a18284ab
  style 18e741d2_6267_db40_d968_52ab8125d86f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/vectorstores/test_utils.py lines 41–46

    def test_zero_vector(self) -> None:
        """Test cosine similarity with zero vector."""
        x: list[list[float]] = [[0, 0, 0]]
        y: list[list[float]] = [[1, 2, 3]]
        with pytest.raises(ValueError, match="NaN values found"):
            _cosine_similarity(x, y)