def test_delete_1():
ll = LinkedList(1)
ll.append(2)
ll.delete(0)
assert 2 == ll[0]
with pytest.raises(IndexError):
ll[1]
def test_insert_1():
ll = LinkedList(1)
ll.append(2)
ll.append(3)
ll.insert(1, "hello")
assert 1 == ll[0]
assert "hello" == ll[1]
assert 2 == ll[2]
assert 3 == ll[3]
def test_index_error_1():
ll = LinkedList(1)
with pytest.raises(ValueError):
ll.index(2)
def test_index():
ll = LinkedList(1)
assert 0 == ll.index(1)
def test_indexing_error_2():
ll = LinkedList(1)
ll.append(2)
with pytest.raises(IndexError):
ll[2]
def test_indexing_error_1():
ll = LinkedList()
with pytest.raises(IndexError):
ll[0]
def test_indexing_2():
ll = LinkedList(1)
ll.append(2)
assert 2 == ll[1]
def test_insert_error_3():
ll = LinkedList(1)
ll.append(2)
ll.append(3)
with pytest.raises(IndexError):
ll.insert(4, "hey")
def test_insert_2():
ll = LinkedList(1)
ll.insert(1, 'hey')
assert 'hey' == ll[1]
def test_append_with_no_head():
ll = LinkedList()
ll.append(1)
assert 1 == ll.head.value
def test_ll_with_head():
ll = LinkedList(1)
assert 1 == ll.head.value
def test_delete_error_2():
ll = LinkedList(1)
ll.append(2)
with pytest.raises(IndexError):
ll.delete(3)
def test_delete_error_1():
ll = LinkedList()
with pytest.raises(IndexError):
ll.delete(0)
def test_delete_head():
ll = LinkedList(1)
ll.delete(0)
assert None is ll.head
def test_insert_head():
ll = LinkedList(1)
ll.insert(0, "hello")
assert "hello" == ll[0]
def test_append():
ll = LinkedList(1)
ll.append(2)
assert 2 == ll.head.next.value
def test_indexing_1():
ll = LinkedList(1)
assert 1 == ll[0]
def test_insert_error_1():
ll = LinkedList()
with pytest.raises(IndexError):
ll.insert(1, 1)
def test_empty_ll():
ll = LinkedList()
assert None is ll.head