client_and_types = (, )
project_id = 'precise-truck-742', data_format = 'AVRO'
expected_schema_type = 'avro_schema'
@pytest.mark.parametrize(
    "data_format,expected_schema_type",
    (("AVRO", "avro_schema"), ("ARROW", "arrow_schema")),
)
def test_read_rows_to_dataframe(
    client_and_types, project_id, data_format, expected_schema_type
):
    client, types = client_and_types
    read_session = types.ReadSession()
    read_session.table = "projects/{}/datasets/{}/tables/{}".format(
        "bigquery-public-data", "new_york_citibike", "citibike_stations"
    )
    read_session.data_format = data_format

    session = client.create_read_session(
        request={
            "parent": "projects/{}".format(project_id),
            "read_session": read_session,
            "max_stream_count": 1,
        }
    )
    schema_type = session._pb.WhichOneof("schema")
    assert schema_type == expected_schema_type

    stream = session.streams[0].name

    frame = client.read_rows(stream).to_dataframe(
        session, dtypes={"latitude": numpy.float16}
    )

    # Station ID is a required field (no nulls), so the datatype should always
    # be integer.
    assert frame.station_id.dtype.name == "int64"
    assert frame.latitude.dtype.name == "float16"
    assert frame.longitude.dtype.name == "float64"


  assert frame["name"].str.startswith("Central Park").any()


E       AssertionError: assert False

E        +  where False = <bound method NDFrame._add_numeric_operations..any of 0      False\n1      False\n2      False\n3      False\n4   ...lse\n       ...  \n549    False\n550    False\n551    False\n552    False\n553    False\nName: name, Length: 554, dtype: bool>()

E        +    where <bound method NDFrame._add_numeric_operations..any of 0      False\n1      False\n2      False\n3      False\n4   ...lse\n       ...  \n549    False\n550    False\n551    False\n552    False\n553    False\nName: name, Length: 554, dtype: bool> = 0      False\n1      False\n2      False\n3      False\n4      False\n       ...  \n549    False\n550    False\n551    False\n552    False\n553    False\nName: name, Length: 554, dtype: bool.any

E        +      where 0      False\n1      False\n2      False\n3      False\n4      False\n       ...  \n549    False\n550    False\n551    False\n552    False\n553    False\nName: name, Length: 554, dtype: bool = <bound method StringMethods.startswith of <pandas.core.strings.accessor.StringMethods object at 0x7f3e48f51670>>('Central Park')

E        +        where <bound method StringMethods.startswith of <pandas.core.strings.accessor.StringMethods object at 0x7f3e48f51670>> = <pandas.core.strings.accessor.StringMethods object at 0x7f3e48f51670>.startswith

E        +          where <pandas.core.strings.accessor.StringMethods object at 0x7f3e48f51670> = 0               Driggs Ave & N 9 St\n1                W 42 St & Dyer Ave\n2           University Pl & E 14 St\n3         ...Worth St\n552                 W 15 St & 7 Ave\n553             E 16 St & Irving Pl\nName: name, Length: 554, dtype: object.str
tests/system/reader/test_reader_dataframe.py:95: AssertionError