def test_filter(self, string_dataset):
"""Test filter registering"""
flow = Flow().from_source(Source(fin=string_dataset.open())).filter(
lambda x: 'line' not in x
)
assert flow.chain[0].type == 'FLOW::FILTER'
assert flow.batch(1)[0] == ['0', '1', '2', '3', '4']
def test_map(self, numeric_dataset):
"""Test map registering"""
flow = Flow().from_source(Source(fin=numeric_dataset.open())).map(
lambda x: [float(_) for _ in x]
).map(
lambda x: [2 * _ for _ in x]
)
assert flow.chain[0].type == 'FLOW::MAP'
assert flow.batch(1)[0] == [0, 0, 2, 4, 6, 8]