def test_mul(self):
zero = cn.mul(cn.zero, cn.one)
self.assertEqual(cn.church_to_int(zero), 0)
two = cn.successor(cn.one)
three = cn.successor(two)
six = cn.mul(two, three)
self.assertEqual(cn.church_to_int(six), 6)
def test_pow(self):
one = cn.pow(cn.one, cn.zero)
self.assertEqual(cn.church_to_int(one), 1)
two = cn.successor(cn.one)
three = cn.successor(two)
eight = cn.pow(two, three)
self.assertEqual(cn.church_to_int(eight), 8)
def test_church_to_int(self):
five = lambda f: lambda x: f(f(f(f(f(x)))))
self.assertEqual(cn.church_to_int(five), 5)
def test_add(self):
zero = cn.add(cn.zero, cn.zero)
self.assertEqual(cn.church_to_int(zero), 0)
three = cn.add(cn.one, cn.successor(cn.one))
self.assertEqual(cn.church_to_int(three), 3)
def test_successor(self):
two = cn.successor(cn.one)
self.assertEqual(cn.church_to_int(two), 2)
three = cn.successor(cn.successor(cn.one))
self.assertEqual(cn.church_to_int(three), 3)
def test_one(self):
self.assertEqual(cn.church_to_int(cn.one), 1)
def test_zero(self):
self.assertEqual(cn.church_to_int(cn.zero), 0)
def test_int_to_church(self):
self.assertEqual(cn.int_to_church(0), cn.zero)
three = cn.int_to_church(3)
self.assertEqual(cn.church_to_int(three), 3)