public void TestArrayHeapImplementationBasic()
{
int[] elements = new int[(int)2e+5];
for (int i = 0; ++i <= elements.Length;)
{
elements[i - 1] = i;
}
Randomize(elements);
WriteLine("Here is a randomly generated array of ints: ");
PrintArray(elements);
WriteLine("Flushing All Elements into the Heap.");
IPriorityQ <int> p = new MyLittleArrayHeapPriorityQueue <int>();
for (int i = -1; ++i < elements.Length;)
{
p.Enqueue(elements[i]);
Write(".");
}
WriteLine();
WriteLine("Removeing min repeatedly and adding it back to the array. ");
for (int i = -1; ++i < elements.Length;)
{
elements[i] = p.RemoveMin();
Assert.IsTrue(elements[i] == i + 1);
}
WriteLine("Printing out the resulted array, should be sorted: ");
PrintArray(elements);
}
public void TestArrayHeapImplementation2()
{
WriteLine("Testing Heap");
int[] arr = new int[(int)3e+5];
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
for (int i = -1; ++i < arr.Length;)
{
arr[i] = i + 1;
}
Randomize(arr);
WriteLine("Enquing the randomized array. ");
for (int i = 0; i < arr.Length; i++)
{
q.Enqueue(arr[i]);
Write(".");
}
WriteLine();
WriteLine("Removing all the odd elements. ");
for (int i = 0; i < arr.Length; i += 2)
{
q.Remove(i + 1);
}
for (int i = 1; i < arr.Length; i += 2)
{
WriteLine("RemovingMin: " + (i + 1));
Assert.AreEqual(i + 1, q.RemoveMin());
}
WriteLine("Test Ended.");
}
public void TestTrinaryArrayHeap()
{
{
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>(null, 3);
int[] simplearray = new int[]
{
1, 0, 4, 9, 2, 6, 7, 5, 3, 8
};
for (int i = 0; i < simplearray.Length; q.Enqueue(simplearray[i]), i++)
{
;
}
for (int i = 0; i < 10; Assert.AreEqual(q.RemoveMin(), i), i++)
{
;
}
}
WriteLine("Simple Trinary heap test passed. ");
{
}
{
int[] RandomizedArray = GetRandomizedIntSequence(100);
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
for (int i = 0; i < RandomizedArray.Length; q.Enqueue(RandomizedArray[i]), i++)
{
;
}
for (int i = 1; i <= 100; Assert.AreEqual(i, q.RemoveMin()), i++)
{
;
}
}
}
public void TestDuplicateElementStressed()
{
Random rd = new Random();
int size = (int)3e7;
int range = (int)3e6;
int[] randomarray = new int[size];
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
for (
int i = -1;
++i < size;
randomarray[i] = (int)(rd.NextDouble() * range)
)
{
;
}
WriteLine("Array is randomized.");
// PrintArray(randomarray);
for (int i = 0; i < randomarray.Length; i++)
{
q.Enqueue(randomarray[i]);
}
Array.Sort(randomarray);
WriteLine("Comparing with a sorted array. ");
// PrintArray(randomarray);
for (int i = 0; i < randomarray.Length; i++)
{
Assert.IsTrue(randomarray[i] == q.RemoveMin());
}
}
/// <summary>
/// Sort and time the time elapse using my Arrayheap.
/// </summary>
/// <param name="thestopwatch"></param>
/// <param name="arrsize"></param>
static void SortAll(MyStopwatch thestopwatch, int arrsize)
{
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
int[] arr = new int[arrsize];
for (int i = 0; i < arr.Length; arr[i] = i + 1, i++)
{
;
}
Randomize(arr);
thestopwatch.Tick();
for (int i = 0; i < arr.Length; q.Enqueue(arr[i]), i++)
{
;
}
for (int i = 0; i < arr.Length; i++)
{
int themin = q.RemoveMin();
if (themin != i + 1)
{
throw new Exception($"Expected: {i+1} but {themin}");
}
}
thestopwatch.Tock();
}
public void TestDuplicateElementBasic2()
{
int range = (int)3e6;
int size = (int)3e5;
Random rd = new Random();
int[] randomarray = new int[size];
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
WriteLine("Creating random array with range " + range + " and size: " + size);
for (int i = -1; ++i < size; randomarray[i] = (int)(rd.NextDouble() * range))
{
;
}
WriteLine("Flushing the elements into the array; ");
for (int i = -1; ++i < size; q.Enqueue(randomarray[i]))
{
;
}
WriteLine("Removing all the odd elements in the PriorityQ");
for (int i = 0; i < size; i++)
{
if (randomarray[i] % 2 == 1)
{
q.Remove(randomarray[i]);
}
}
WriteLine("Constructing a reference list to verify the answers...");
IList <int> referencelist = new List <int>();
for
(
int i = 0;
i < size;
i++
)
{
if (randomarray[i] % 2 == 0)
{
referencelist.Add(randomarray[i]);
}
}
;
int[] referencearray = new int[referencelist.Count];
referencelist.CopyTo(referencearray, 0);
Sort(referencearray);
PrintArray(referencearray);
WriteLine("Length of the reference array: " + referencearray.Length);
WriteLine("Length of the queue: " + q.Size);
Assert.IsTrue(referencearray.Length == q.Size);
for (int i = 0; i < referencearray.Length; i++)
{
WriteLine("Comparing element at index: " + i);
int e1 = q.RemoveMin();
int e2 = referencearray[i];
Assert.IsTrue(e2 == e1);
}
}
public void TestArrayHeapPriorityQExceptionHandling()
{
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
q.Enqueue(2);
q.Enqueue(3);
q.Enqueue(2);
q.Remove(2);
AssertThrow <InvalidArgumentException>(() => { q.Remove(5); });
q.Remove(2);
AssertThrow <InvalidArgumentException>(() => { q.Remove(2); });
}
public void TestBuildHeap()
{
int[] arr = new int[(int)3e+5];
for (int i = -1; ++i < arr.Length; arr[i] = i + 1)
{
;
}
Randomize(arr);
var q = MyLittleArrayHeapPriorityQueue <int> .BuildHeap(arr);
for (int i = -1; ++i < arr.Length;)
{
Assert.AreEqual(q.RemoveMin(), i + 1);
}
}
public void TestDuplicateElementsBasic()
{
int[] testcase1 = new int[] { 5, 5, 6, 7, 9, 8, 2, 4, 5, 3, 1 };
int[] correct = new int[] { 1, 2, 3, 4, 5, 5, 5, 6, 7, 8, 9 };
IPriorityQ <int> q = new MyLittleArrayHeapPriorityQueue <int>();
for (int i = -1; ++i < testcase1.Length; q.Enqueue(testcase1[i]))
{
;
}
for (
int i = -1;
++i < testcase1.Length;
Assert.IsTrue(q.RemoveMin() == correct[i])
)
{
;
}
}
