public void CreateFromZeroLengthArrayShouldReturnNull()
{
int[] array = new int[0];
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
Assert.IsNull(actual, "actual should be null since length of array is 0");
}
public void CreateFromArrayShouldResultInHeaderLengthEqualToArrayLength()
{
int[] array = new int[] { 5, 12, 15, -61, 0 };
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
Assert.AreEqual(array.Length, DoubleLinkedNode <int> .Length(actual), "Length");
}
public void SearchShouldReturnNullWhenNotFound()
{
int[] array = new int[] { 12, 15, -61, 0, 5 };
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
Assert.IsNull(actual.Search(38129), "Should return null");
}
public void LastShouldReturnFinalNode()
{
int[] array = new int[] { 12, 15, -61, 0, 5 };
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
SingleLinkedNode <int> last = actual.Last();
Assert.IsNotNull(last, "Last should not be null");
Assert.IsTrue(last.IsLast, "IsLast should be true for last node");
Assert.AreEqual(5, last.Value, "Value should be equal to final array value");
}
public void ToStringShouldPrintValuesInOrder()
{
int[] array = new int[] { 5, 12, 15, -61, 0 };
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
string toString = actual.ToString();
Assert.IsNotNull(toString, "Should not be null string");
Assert.IsNotEmpty(toString, "Should not be empty string");
Assert.AreEqual("5, 12, 15, -61, 0", toString, "String is incorrect");
}
public void SearchShouldReturnNodeWhenValueFound()
{
int[] array = new int[] { 12, 15, -61, 0, 5 };
SingleLinkedNode <int> actual = SingleLinkedNode <int> .CreateFromArray(array);
SingleLinkedNode <int> result = actual.Search(15);
Assert.IsNotNull(result, "Should not return null");
Assert.AreEqual(15, result.Value, "Value");
Assert.AreEqual(-61, result.Next.Value, "Next value");
}
public void CreateFromNullArrayShouldThrowException()
{
int[] array = null;
_ = Assert.Throws(typeof(ArgumentNullException), () => SingleLinkedNode <int> .CreateFromArray(array),
"Expected to throw System.ArgumentNullException");
}
