python/tests/conftest.py

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import pyarrow as pa
import pytest
from datafusion import DataFrame, SessionContext
from pyarrow.csv import write_csv


@pytest.fixture
def ctx():
    return SessionContext()


@pytest.fixture
def database(ctx, tmp_path):
    path = tmp_path / "test.csv"

    table = pa.Table.from_arrays(
        [
            [1, 2, 3, 4],
            ["a", "b", "c", "d"],
            [1.1, 2.2, 3.3, 4.4],
        ],
        names=["int", "str", "float"],
    )
    write_csv(table, path)

    ctx.register_csv("csv", path)
    ctx.register_csv("csv1", str(path))
    ctx.register_csv(
        "csv2",
        path,
        has_header=True,
        delimiter=",",
        schema_infer_max_records=10,
    )


@pytest.fixture
def fail_collect(monkeypatch):
    def _fail_collect(self, *args, **kwargs):  # pragma: no cover - failure path
        msg = "collect should not be called"
        raise AssertionError(msg)

    monkeypatch.setattr(DataFrame, "collect", _fail_collect)