public void MergeSort_GivenUnsortedArray_ArrayIsSorted()
{
int[] array = { 7, 54, 11, 5, 64, 48, 3, 76, 1, 21, 19 };
MergeSort1.MergeSort(array);
Assert.That(array, Is.Ordered);
}
public void MergeSort_GivenEmptyArray_ArrayStillEmpty()
{
int[] array = new int[0];
MergeSort1.MergeSort(array);
Assert.That(array, Is.Empty);
}
public void MergeSort_GivenArrayOfSingleElement_DoNothing()
{
int[] array = { 0 };
MergeSort1.MergeSort(array);
Assert.That(array, Has.Exactly(1).EqualTo(0));
}
public void MergeSort_AlreadySortedArray_ArrayDoesNotChange()
{
int[] initialArray = { 1, 2, 3, 4, 5, 6, 7 };
int[] expected = { 1, 2, 3, 4, 5, 6, 7 };
MergeSort1.MergeSort(initialArray);
Assert.That(initialArray, Is.EquivalentTo(expected));
}
