public void TestPerformanceForAllSorters()
{
int[] original = GetLargeIntArrayForPerformanceTest();
int[] bubbleArray = original.Clone() as int[];
int[] selectionArray = original.Clone() as int[];
int[] insertionArray = original.Clone() as int[];
int[] shellArray = original.Clone() as int[];
int[] mergeArray = original.Clone() as int[];
int[] quickArray = original.Clone() as int[];
int[] almostOrderedArray = original.Clone() as int[];
IntArraySorter.QuickSort(almostOrderedArray);
int upperBound = Math.Min(10, almostOrderedArray.Length >> 1);
for (int i = 0; i < upperBound; i++)
{
almostOrderedArray.Swap(i, almostOrderedArray.Length - i - 1);
}
int iteration = 1;
CodeTimer.Time("BubbleSorter", iteration,
() => IntArraySorter.BubbleSort(bubbleArray)
);
CodeTimer.Time("SelectionSorter", iteration,
() => IntArraySorter.SelectionSort(selectionArray)
);
// Insertion is good for an almost ordered array.
CodeTimer.Time("InsertionSort_For_Almost_Ordered_Array", iteration,
() => IntArraySorter.SelectionSort(almostOrderedArray)
);
CodeTimer.Time("InsertionSort", iteration,
() => IntArraySorter.InsertionSort(insertionArray)
);
CodeTimer.Time("ShellSort", iteration,
() => IntArraySorter.ShellSort(shellArray)
);
CodeTimer.Time("MergeSort", iteration,
() => IntArraySorter.MergeSort(quickArray)
);
// TODO: Make no sense, the array has been changed after one sorting?
CodeTimer.Time("QuickSort", iteration,
() => IntArraySorter.QuickSort(quickArray)
);
}
public void TestShellSort()
{
Console.WriteLine("Testing {0} Start...", ObjectHelper.GetMethodName());
int[] array = GetIntArray();
int[] backup = array.Clone() as int[];
Console.WriteLine("Original Array: ");
backup.PrintToConsole();
IntArraySorter.ShellSort(array);
CollectionAssert.AreEquivalent(backup, array);
Assert.That(array.IsAscOrdered(), Is.True);
Console.WriteLine("Ordered Array: ");
array.PrintToConsole();
Console.WriteLine("Testing {0} End...", ObjectHelper.GetMethodName());
}