def test_empty_list_creation():
l_list = LinkedList()
assert len(l_list) == 0
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(index=0)
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(index=666)
def test_delete_element():
l_list = LinkedList()
l_list.add_element(index=0, data="Hi!")
assert len(l_list) == 1
l_list.delete_element(index=0)
assert len(l_list) == 0
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(index=0)
def test_getting_element():
l_list = LinkedList()
l_list.add_element(index=0, data=1)
assert l_list.get_element_data(index=0) == 1
assert len(l_list) == 1
l_list.add_element(index=0, data=5)
assert l_list.get_element_data(index=0) == 5
assert len(l_list) == 2
l_list.add_element(index=2, data=7)
assert l_list.get_element_data(index=2) == 7
assert l_list.get_element_data(index=1) == 1
assert len(l_list) == 3
def test_wrong_index():
l_list = LinkedList()
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(1)
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(-1)
with pytest.raises(LinkedList.WrongIndexException):
l_list.get_element_data(0)
def test_list_with_one_element():
l_list = LinkedList()
l_list.add_element(index=0, data=123)
assert len(l_list) == 1
assert l_list.get_element_data(0) == 123
