def test_to_arrow_no_pyarrow_raises_import_error(mut, class_under_test,
mock_client, monkeypatch):
monkeypatch.setattr(mut, "pyarrow", None)
arrow_schema = _bq_to_arrow_schema(SCALAR_COLUMNS)
read_session = _generate_arrow_read_session(arrow_schema)
arrow_batches = _bq_to_arrow_batches(SCALAR_BLOCKS, arrow_schema)
reader = class_under_test(arrow_batches, mock_client,
bigquery_storage_v1beta1.types.StreamPosition(),
{})
with pytest.raises(ImportError):
reader.to_arrow(read_session)
with pytest.raises(ImportError):
reader.rows(read_session).to_arrow()
with pytest.raises(ImportError):
next(reader.rows(read_session).pages).to_arrow()
def test_to_arrow_w_scalars_arrow(class_under_test):
arrow_schema = _bq_to_arrow_schema(SCALAR_COLUMNS)
read_session = _generate_arrow_read_session(arrow_schema)
arrow_batches = _bq_to_arrow_batches(SCALAR_BLOCKS, arrow_schema)
reader = class_under_test(arrow_batches, mock_client,
bigquery_storage_v1beta1.types.StreamPosition(),
{})
actual_table = reader.to_arrow(read_session)
expected_table = pyarrow.Table.from_batches(
_bq_to_arrow_batch_objects(SCALAR_BLOCKS, arrow_schema))
assert actual_table == expected_table