test_blake2b_encoder() — langchain Function Reference

Architecture documentation for the test_blake2b_encoder() function in test_caching.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 1

Entity Profile

LangChainCore→ MessageInterface→ test_blake2b_encoder() — langchain Function Reference

Dependency Diagram

graph TD
  7a51ab83_8cff_1ddb_7a4b_1a56eaf2f8fa["test_blake2b_encoder()"]
  6b1a1e58_d1bc_2756_cc7d_9c01f64a73a2["test_caching.py"]
  7a51ab83_8cff_1ddb_7a4b_1a56eaf2f8fa -->|defined in| 6b1a1e58_d1bc_2756_cc7d_9c01f64a73a2
  612e991b_9f93_9ffa_30df_6f17578ea52c["embed_documents()"]
  7a51ab83_8cff_1ddb_7a4b_1a56eaf2f8fa -->|calls| 612e991b_9f93_9ffa_30df_6f17578ea52c
  style 7a51ab83_8cff_1ddb_7a4b_1a56eaf2f8fa fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/embeddings/test_caching.py lines 161–177

def test_blake2b_encoder() -> None:
    """Test that the blake2b encoder is used to encode keys in the cache store."""
    store = InMemoryStore()
    emb = MockEmbeddings()
    cbe = CacheBackedEmbeddings.from_bytes_store(
        emb,
        store,
        namespace="ns_",
        key_encoder="blake2b",
    )

    text = "blake"
    cbe.embed_documents([text])

    # rebuild the key exactly as the library does
    expected_key = "ns_" + hashlib.blake2b(text.encode()).hexdigest()
    assert list(cbe.document_embedding_store.yield_keys()) == [expected_key]