def test_slist():
lst = slist([1, 2, 3])
assert_equal(lst.hd, 1)
assert_equal(lst.tl.hd, 2)
assert_equal(lst.tl.tl.hd, 3)
assert_equal(lst.tl.tl.tl, nil)
def test_len():
assert_equal(len(nil), 0)
assert_equal(len(slist([1])), 1)
assert_equal(len(slist([1, 2, 3])), 3)
def test_free_stuff():
assert_equal(sum(slist([1, 2, 3])), 6)
assert_equal(set(slist([1, 2, 1])), {1, 2})
assert_equal(dict(slist([(1, 2), (3, 4)])), {1: 2, 3: 4})
def hash_test():
assert_equal(hash(slist()), hash(slist()))
assert_equal(hash(slist([1])), hash(slist([1])))
assert_equal(hash(slist([1, 2, 3])), hash(slist([1, 2, 3])))
assert_not_equal(hash(slist()), hash(slist([1])))
assert_not_equal(hash(slist([1, 2, 3])), hash(slist([1])))
def test_reversed():
assert_equal(reversed(slist([1, 2, 3])), slist([3, 2, 1]))
def equality_test():
assert_equal(slist(), slist())
assert_equal(slist([1]), slist([1]))
assert_not_equal(slist([]), slist([1]))
assert_not_equal(slist([1]), slist([]))
assert_equal(slist([1, 2, 3]), slist([1, 2, 3]))
assert_not_equal(slist([0, 2]), slist([1, 1]))
assert_not_equal(slist([1, 2]), slist([1, 0]))
assert_not_equal(slist([1, 2]), slist([1]))
assert_not_equal(slist([1]), slist([1, 2]))
def test_no_arg_constructor():
assert_true(slist() is nil)
def repr_test():
assert_equal(repr(nil), 'nil')
assert_equal(repr(slist([1, 2, 3])), 'slist([1, 2, 3])')
def truth_test():
assert_false(nil)
assert_true(slist([1]))
def test_iter():
for lst in [ [], [1], [1, 2, 3], [1, 1, 1] ]:
assert_equal(lst, list(slist(lst)))