public void MergeSort_TestArraySort_ExpectedArray()
{
int[] testArray = { 7, -2, 1, 4, 0, 9, 5, 3, 1, 8 };
int[] expectedArray = { -2, 0, 1, 1, 3, 4, 5, 7, 8, 9 };
Sortings.MergeSort(testArray);
CollectionAssert.AreEqual(expectedArray, testArray);
}
public void MergeSort_NullArray()
{
// Arrange
int[] array = null;
// Act
Sortings.MergeSort(array);
}
public void MergeSort_IntArrayOfNegativeAndBigEl()
{
// Arrange
var expexted = new[] { int.MinValue, -333, 0, 1, 9999, int.MaxValue };
var actual = new[] { 9999, int.MaxValue, -333, int.MinValue, 0, 1 };
// Act
Sortings.MergeSort(actual);
// Assert
Assert.IsTrue(expexted.SequenceEqual(actual));
}
public void MergeSort_IntArrayOf5El()
{
// Arrange
var expexted = new[] { 1, 2, 3, 4, 5 };
var actual = new[] { 3, 1, 2, 5, 4 };
// Act
Sortings.MergeSort(actual);
// Assert
Assert.IsTrue(expexted.SequenceEqual(actual));
}
public void MergeSort_LargeArray_ExtectedArray()
{
int minPossibleValue = 0;
int maxPossibleValue = 1000000;
Random randNum = new Random();
int[] largeTestArray = new int[Int32.MaxValue / 10000];
for (int i = 0; i < largeTestArray.Length; i++)
{
largeTestArray[i] = randNum.Next(minPossibleValue, maxPossibleValue);
}
int[] expectedArray = largeTestArray;
Array.Sort(expectedArray);
Sortings.MergeSort(largeTestArray);
CollectionAssert.AreEqual(expectedArray, largeTestArray);
}
public void MergeSort_EmptyArray_ArgumentNullException()
{
Sortings.MergeSort(new int[] { });
}
public void MergeSort_Null_ArgumentNullException()
{
Sortings.MergeSort(null);
}