trezor-firmware/tests/test_trezor.utils.py

from common import *

from trezor import utils

class TestUtils(unittest.TestCase):

    def test_chunks(self):
        c = list(utils.chunks(range(100), 7))
        for i in range(15):
            # need to check start, stop, step attrs until https://github.com/micropython/micropython/issues/2600 is resolved
            self.assertEqual(c[i].start, i * 7)
            self.assertEqual(c[i].stop, 100 if (i == 14) else (i + 1) * 7)
            self.assertEqual(c[i].step, 1)

if __name__ == '__main__':
    unittest.main()