pure_python/test_treefactorial.py at main · ectomancer/pure_python

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import math
import sympy
import treefactorial
def test_treefactorial():
    """Test treefactorial with pytest."""
    assert treefactorial.factorial(0) == 1
    assert treefactorial.factorial(1) == 1
    assert treefactorial.factorial(2) == 2
    assert treefactorial.factorial(3) == 6
    assert treefactorial.factorial(4) == 24
    assert treefactorial.factorial(5) == 120
    assert treefactorial.factorial(6) == 720
    assert treefactorial.factorial(7) == 5040
    assert treefactorial.factorial(8) == 40320
    assert treefactorial.factorial(9) == 362880
    assert treefactorial.factorial(10) == 3628800
    for integer in range(11, 101):
        assert treefactorial.factorial(integer) == math.factorial(integer)
def test_subfactorial():
    """Test subfactorial with pytest."""
    for n in range(101):
        assert treefactorial.subfactorial(n) == sympy.functions.combinatorial.factorials.subfactorial(n)
def test_binom():
    """Test binom with pytest."""
    #http://oeis.org/A000984
    oeis = [1,2,6,20,70,252,924,3432,12870,48620,184756,
    result = list()
    for n in range(28):
        result += [treefactorial.binom(2*n, n)]
    assert result == oeis
    #http://oeis.org/A000984/b000984.txt
    result = list()
    for n in range(501):
        result += [treefactorial.binom(2*n, n)]
    assert result == oeis

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