public void ElementAt_should_throw_IndexOutOfRangException_if_index_is_less_than_0()
{
//Arrange
var list = new Structures.LinkedList <int>();
int index = -1;
//Act & Assert
Assert.Throws <IndexOutOfRangeException>(() => list.ElementAt(index));
}
public void ElementAt_should_throw_IndexOutOfRangException_if_index_is_equal_to_count()
{
//Arrange
var list = new Structures.LinkedList <int>();
int index = list.Length;
//Act & Assert
Assert.Throws <IndexOutOfRangeException>(() => list.ElementAt(index));
}
private Structures.LinkedList <int> GetIntegerList()
{
var list = new Structures.LinkedList <int>();
for (int i = 0; i < 10; i++)
{
list.AddLast(i);
}
return(list);
}
private string GetStringOfElements(Structures.LinkedList <int> list)
{
var builder = new StringBuilder("");
foreach (var el in list)
{
builder.Append(el);
}
return(builder.ToString());
}
public void Length_should_return_0_if_list_is_empty()
{
//Arrange
var list = new Structures.LinkedList <int>();
var expectedLength = 0;
//Act
var length = list.Length;
//Assert
Assert.AreEqual(expectedLength, length);
}
public void Remove_should_return_false_if_item_does_not_exist()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
//Act
var result = list.Remove(2);
//Assert
Assert.False(result);
}
public void Remove_should_return_true_if_item_has_been_deleted()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
//Act
var result = list.Remove(1);
//Assert
Assert.True(result);
}
public void InsertAfter_should_return_false_if_list_is_empty()
{
//Arrange
var list = new Structures.LinkedList <int>();
int target = 0;
int data = 0;
//Act
var actionResult = list.InsertAfter(target, data);
//Assert
Assert.False(actionResult);
}
public void AddAt_should_add_element_on_first_position_if_list_is_empty()
{
//Arrange
var list = new Structures.LinkedList <int>();
int index = 0;
int data = 0;
//Act
var actionResult = list.AddAt(index, data);
//Assert
Assert.True(actionResult);
}
public void AddAt_should_return_false_if_index_is_out_of_range()
{
//Arrange
var list = new Structures.LinkedList <int>();
int index = -1;
int data = 0;
//Act
var actionResult = list.AddAt(index, data);
//Assert
Assert.False(actionResult);
}
public void RemoveAt_should_return_false_if_index_if_out_of_range()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
int index = -1;
//Act
bool result = list.RemoveAt(index);
//Assert
Assert.False(result);
}
public void AddLast_should_return_list_with_one_element_if_it_was_empty()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
var expectedLength = 1;
//Act
var length = list.Length;
//Assert
Assert.AreEqual(expectedLength, length);
}
public void AddLast_should_add_data_on_last_position()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
list.AddLast(2);
var expectedContent = "12";
//Act
var content = GetStringOfElements(list);
//Assert
Assert.AreEqual(expectedContent, content);
}
public void Count_should_return_count_of_elements_if_list_is_not_empty()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
list.AddLast(1);
var expectedLength = 2;
//Act
var length = list.Length;
//Assert
Assert.AreEqual(expectedLength, length);
}
public void ElementAt_should_return_item_data_on_specified_position()
{
//Arrange
var list = new Structures.LinkedList <int>();
int data = 1;
list.AddLast(data);
int index = 0;
//Act
var item = list.ElementAt(index);
//Assert
Assert.AreEqual(data, item);
}
public void Remove_should_decrease_count_if_success()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
var expectedLength = list.Length - 1;
//Act
list.Remove(1);
var length = list.Length;
//Assert
Assert.AreEqual(expectedLength, length);
}
public void Remove_should_remove_first_occurence_of_item()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
list.AddLast(2);
list.AddLast(1);
string expectedResult = "21";
//Act
list.Remove(1);
//Assert
Assert.AreEqual(expectedResult, GetStringOfElements(list));
}
public void RemoveAt_should_decrease_count_if_success()
{
//Arrange
Structures.LinkedList <int> list = GetIntegerList();
int index = 0;
list.AddLast(1);
var expectedLength = list.Length - 1;
//Act
list.RemoveAt(index);
var length = list.Length;
//Assert
Assert.AreEqual(expectedLength, length);
}
public void GetEnumerator_should_return_all_items()
{
//Arrange
var list = new Structures.LinkedList <int>();
list.AddLast(1);
list.AddLast(2);
list.AddLast(3);
var expectedResult = "123";
var result = "";
//Act
foreach (var el in list)
{
result += el;
}
//Assert
Assert.AreEqual(expectedResult, result);
}