def test_lists_are_equal():
l1 = LinkedList.fromvalues([1, 2, 3, 4])
with pytest.raises(TypeError):
assert l1 == [1, 2, 3, 4]
l2 = LinkedList.fromvalues([1, 2, 3])
assert l1 != l2
l3 = LinkedList.fromvalues([1, 2, 3, 4])
assert l1 == l3
def test_list_removes_x():
l = LinkedList.fromvalues([1, 2, 3, 4, 5, 6])
l.remove(1)
assert 5 == len(l)
assert 1 not in l
with pytest.raises(ValueError):
l.remove(10)
def test_list_indexes_x():
l = LinkedList.fromvalues([1, 2, 3, 4, 5, 6])
assert 0 == l.index(1)
assert 5 == l.index(6)
assert 5 == l.index(6, 5)
with pytest.raises(ValueError):
l.index(12)
with pytest.raises(ValueError):
l.index(1, 2)
def test_list_inserts_x():
l = LinkedList.fromvalues([1])
l.insert(0, 2)
assert len(l) == 2
assert [2, 1] == list(l)
l.insert(3, 3)
assert len(l) == 3
assert [2, 1, 3] == list(l)
l.insert(100, 100)
assert [2, 1, 3, 100] == list(l)
def test_list_appends_x():
l = LinkedList()
l.append(1)
l.append(2)
l.append(3)
assert len(l) == 3
assert list(l) == [1, 2, 3]
def test_list_pops_item():
l = LinkedList.fromvalues([1, 2, 3, 4, 5, 6])
assert 1 == l.pop(0)
assert len(l) == 5
assert 6 == l.pop()
assert len(l) == 4
# [2, 3, 4, 5]
assert 3 == l.pop(1)
assert 4 == l.pop(-2)
assert 5 == l.pop()
assert 2 == l.pop()
with pytest.raises(IndexError):
l.pop()
def test_reverse_list(values, reversed_values):
l = LinkedList.fromvalues(values)
l.reverse()
assert list(l) == reversed_values
def test_list_contains_x():
values = [1, 2, 3, 4]
l = LinkedList.fromvalues(values)
assert 1 in l
assert 3 in l
assert 10 not in l
def test_create_linked_list_from_values():
values = [1, 2, 3, 4]
l = LinkedList.fromvalues(values)
assert list(l) == values
assert len(l) == len(values)