from bonobo.constants import INHERIT
from bonobo.util.testing import BufferingNodeExecutionContext

messages = [('Hello',), ('Goodbye',)]


def append(*args):
    return INHERIT, '!'


def test_inherit():
    with BufferingNodeExecutionContext(append) as context:
        context.write_sync(*messages)

    assert context.get_buffer() == list(map(lambda x: x + ('!',), messages))


def test_inherit_bag_tuple():
    with BufferingNodeExecutionContext(append) as context:
        context.set_input_fields(['message'])
        context.write_sync(*messages)

    assert context.get_output_fields() == ('message', '0')
    assert context.get_buffer() == list(map(lambda x: x + ('!',), messages))