def test_with_single_error():
source = "011100101001"
encoded_codeword = encode(source)
for error_index in range(len(encoded_codeword)):
corrupted_bit = '0' if encoded_codeword[error_index] == '1' else '1'
corrupted = encoded_codeword[:
error_index] + corrupted_bit + encoded_codeword[
error_index + 1:]
assert decode(corrupted) == source
def test_without_errors_1():
assert encode("000000000010") == "00000000001100011101010"
assert decode("00000000001100011101010") == "000000000010"
def test_with_three_errors():
source = "111010111001"
encoded_codeword = encode(source)
for _ in range(1000):
corrupted = make_errors(encoded_codeword, 3)
assert decode(corrupted) == source