def test_01_connection_init(neo4j_graph_store: Neo4jGraphStore):
    """
    Test initial connection and constraint creation.
    Verifies that the store is connected and schema can be fetched.
    """
    assert neo4j_graph_store is not None
    schema_str = neo4j_graph_store.get_schema(refresh=True)
    # We don't necessarily expect non-empty schema if DB is brand-new,
    # but we at least can check that it's a string.
    assert isinstance(schema_str, str)

    Test initial connection and constraint creation.
    Verifies that the store is connected and schema can be fetched.
    
llama-index-integrations/graph_stores/llama-index-graph-stores-neo4j/tests/test_graph_stores_neo4j.py