from __future__ import annotations


def test_node_mapper_preserves_canonical_identity_and_freshness_metadata():
    from app.core.knowledge.llamaindex.node_mapper import evidence_to_node
    from app.core.knowledge.retrieval.contracts import KnowledgeEvidence

    evidence = KnowledgeEvidence(
        chunk_id="chunk-1",
        content="客户同步用途",
        score=0.9,
        retriever="vector",
        object_uid="object-1",
        object_type="DataFlow",
        object_version=4,
        business_domain_uid="domain-a",
        point_keys=("DataFlow/object-1/purpose",),
        point_revisions=(2,),
        generation=3,
        source_updated_at="2026-07-23T00:00:00+00:00",
    )

    node = evidence_to_node(evidence)

    assert node.node_id == "chunk-1"
    assert node.metadata["object_version"] == 4
    assert node.metadata["point_revisions"] == [2]
    assert node.metadata["index_generation"] == 3