def test_sort(self):
    c = Collection([5, 3, 1, 2, 4])
    sorted = c.sort((lambda x: x))
    self.assertEqual([1, 2, 3, 4, 5], sorted.all())
def test_sort(self):
    c = Collection([5, 3, 1, 2, 4])
    sorted = c.sort((lambda x: x))
    self.assertEqual([1, 2, 3, 4, 5], sorted.all())