python/datafusion/tests/test_catalog.py

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import pyarrow as pa
import pytest


def test_basic(ctx, database):
    with pytest.raises(KeyError):
        ctx.catalog("non-existent")

    default = ctx.catalog()
    assert default.names() == ["public"]

    for database in [default.database("public"), default.database()]:
        assert database.names() == {"csv1", "csv", "csv2"}

    table = database.table("csv")
    assert table.kind == "physical"
    assert table.schema == pa.schema(
        [
            pa.field("int", pa.int64(), nullable=True),
            pa.field("str", pa.string(), nullable=True),
            pa.field("float", pa.float64(), nullable=True),
        ]
    )