def test_list():
orig = range(10)
l = Asserter(orig)
l.is_(orig)
l.length() == 10
with assert_raises():
l.length() == 9
def test_nested():
orig = Dog(13)
obj = Asserter(orig)
obj.is_(orig)
obj.isinstance(Dog)
with assert_raises():
obj.isinstance(int)
obj.say() == "woof"
with assert_raises():
obj.say() == "quack"
obj.age == 13
with assert_raises():
obj.age == 15
