def test_add():
a = Binary(123)
b = Binary(345)
c = Binary(468)
assert a + b == c
assert a.is_binary(a)
assert a.is_binary(a + b)
def test_is_binary():
Bin = Binary()
assert Bin.is_binary('10101')
assert Bin.is_binary('0')
assert not Bin.is_binary('102')
assert not Bin.is_binary('1af0')
assert not Bin.is_binary(10)
def test_mod_add():
a = Binary(234)
b = Binary(345)
c = Binary(500)
d = Binary(579)
assert a % b != c
assert a % b != d
d.set_size(len(b))
assert a % b == d
assert a.is_binary(a)
assert b.is_binary(b)
assert c.is_binary(c)
assert d.is_binary(d)