from sympy.ntheory import count_digits, digits, is_palindromic

from sympy.testing.pytest import raises


def test_digits():
    assert all(digits(n, 2)[1:] == [int(d) for d in format(n, 'b')]
                for n in range(20))
    assert all(digits(n, 8)[1:] == [int(d) for d in format(n, 'o')]
                for n in range(20))
    assert all(digits(n, 16)[1:] == [int(d, 16) for d in format(n, 'x')]
                for n in range(20))
    assert digits(2345, 34) == [34, 2, 0, 33]
    assert digits(384753, 71) == [71, 1, 5, 23, 4]
    assert digits(93409, 10) == [10, 9, 3, 4, 0, 9]
    assert digits(-92838, 11) == [-11, 6, 3, 8, 2, 9]
    assert digits(35, 10) == [10, 3, 5]
    assert digits(35, 10, 3) == [10, 0, 3, 5]
    assert digits(-35, 10, 4) == [-10, 0, 0, 3, 5]
    raises(ValueError, lambda: digits(2, 2, 1))


def test_count_digits():
    assert count_digits(55, 2) == {1: 5, 0: 1}
    assert count_digits(55, 10) == {5: 2}
    n = count_digits(123)
    assert n[4] == 0 and type(n[4]) is int


def test_is_palindromic():
    assert is_palindromic(-11)
    assert is_palindromic(11)
    assert is_palindromic(0o121, 8)
    assert not is_palindromic(123)
