public void LinkedHeap_BasicTest()
{
LinkedHeap <TestClass> heap =
new LinkedHeap <TestClass>(
delegate(TestClass tc1, TestClass tc2)
{
return(tc1.Ord.CompareTo(tc2.Ord));
}
);
SortedDictionary <int, TestClass> fromInt = new SortedDictionary <int, TestClass>();
Random r = new Random();
for (int reps = 0; reps < 20; reps++)
{
fromInt.Clear();
while (fromInt.Count < 1000)
{
string key = new String(
Enumerable.Range(0, 20)
.Select(i => (char)r.Next(32, (int)'z'))
.ToArray()
);
int randomInt = r.Next();
TestClass tc = new TestClass(key, r.Next());
if (!fromInt.ContainsKey(randomInt))
{
fromInt[randomInt] = tc;
try
{
heap.Add(tc);
}
catch (Exception ex)
{
Assert.Fail("Failure while adding a new item when the existing count is " + fromInt.Count.ToString() + ": " + ex.Message);
}
}
}
if (heap.Count > 0)
{
int prevKey = heap.DeleteMax().Ord;
while (heap.Count > 0)
{
int ord = heap.DeleteMax().Ord;
if (ord > prevKey)
{
Assert.Fail("Ordering reported by the heap is incorrect.");
}
prevKey = ord;
}
}
}
}
public void LinkedHeap_Comprehensive()
{
LinkedHeap <HeapTestClass> heap = new LinkedHeap <HeapTestClass>();
SortedSet <HeapTestClass> sortedSet = new SortedSet <HeapTestClass>(new StrictComparerHeapTest());
HashSet <HeapTestClass> hashSet = new HashSet <HeapTestClass>();
Random r = new Random();
Func <int> ordGenerator = () => { return(r.Next(0, 50)); };
const int testMaxLen = 200;
for (int maxSize = 1; maxSize < testMaxLen; maxSize++)
{
// Serial addition
try
{
for (int i = 0; i < maxSize; i++)
{
int ord = ordGenerator();
string label = new String(Enumerable.Range(0, 10).Select(randChar => (char)r.Next(33, 96 + 26)).ToArray());
HeapTestClass obj = new HeapTestClass(label, ord);
heap.Add(obj);
hashSet.Add(obj);
sortedSet.Add(obj);
Assert.IsTrue(heap.Max.CompareTo(sortedSet.Max) == 0, String.Format("Max elements do not match during Serial Addition. Index is {0} of {1}", i, maxSize));
Assert.AreEqual <int>(sortedSet.Count, heap.Count, String.Format("Count of the heap is wrong Serial Addition for maxSize {0}", maxSize));
Assert.IsTrue(hashSet.SetEquals(heap), String.Format("Enumerable does not have the right set of elements during Serial Addition. i = {0}, maxSize = {1}. {2} vs {3}",
i,
maxSize,
String.Join(", ", hashSet.Select(item => item.Ord.ToString())),
String.Join(", ", heap.Select(item => item.Ord.ToString()))
));
}
} catch (Exception ex)
{
throw new Exception("Failure during Serial Addition: " + ex.Message, ex);
}
// Refreshes
HeapTestClass[] objArray = sortedSet.ToArray();
for (int i = 0; i < maxSize; i++)
{
try
{
HeapTestClass obj = objArray[i];
sortedSet.Remove(obj);
obj.Ord = ordGenerator();
sortedSet.Add(obj);
heap.Refresh(obj);
Assert.IsTrue(heap.Max.CompareTo(sortedSet.Max) == 0, String.Format("Max elements do not match during Refresh test. Index is {0} of {1}", i, maxSize));
Assert.IsTrue(hashSet.SetEquals(heap), "Enumerable does not have the right set of elements during Refresh.");
} catch (Exception ex)
{
throw new Exception(String.Format("Failure during Refreshes at i = {0}, maxSize = {1}: {2}", i, maxSize, ex.Message), ex);
}
}
// Random removals
ListTestHelper.ShuffleArray(objArray);
try
{
for (int i = 0; i < maxSize; i++)
{
HeapTestClass obj = objArray[i];
Assert.IsTrue(heap.Max.CompareTo(sortedSet.Max) == 0, String.Format("Max elements do not match during Random Removal test. Index is {0} of {1}", i, maxSize));
sortedSet.Remove(obj);
heap.Remove(obj);
hashSet.Remove(obj);
Assert.IsTrue(hashSet.SetEquals(heap), "Enumerable does not have the right set of elements during Random Removal.");
}
} catch (Exception ex)
{
throw new Exception("Failure during Random Removals: " + ex.Message, ex);
}
// Repeat Addition
try
{
for (int i = 0; i < objArray.Length; i++)
{
HeapTestClass obj = objArray[i];
heap.Add(obj);
sortedSet.Add(obj);
hashSet.Add(obj);
Assert.IsTrue(heap.Max.CompareTo(sortedSet.Max) == 0, String.Format("Max elements do not match during Repeat Addition. Index is {0} of {1}", i, maxSize));
Assert.IsTrue(hashSet.SetEquals(heap), "Enumerable does not have the right set of elements during Repeat Addition.");
Assert.AreEqual <int>(sortedSet.Count, heap.Count, String.Format("Count of the heap is wrong Repeat Addition for maxSize {0}", maxSize));
}
} catch (Exception ex)
{
throw new Exception("Failure during Repeat Addition: " + ex.Message, ex);
}
// Serial Deletion
try
{
for (int i = 0; i < maxSize; i++)
{
HeapTestClass obj = heap.DeleteMax();
Assert.IsTrue(obj.CompareTo(sortedSet.Max) == 0, String.Format("Max elements do not match during serial-deletion test when maxSize = {0}, deletions = {1}", maxSize, i + 1));
sortedSet.Remove(obj);
hashSet.Remove(obj);
Assert.AreEqual <int>(hashSet.Count, heap.Count, String.Format("Count of the heap is wrong during Serial Deletion for maxSize {0}", maxSize));
Assert.IsTrue(hashSet.SetEquals(heap), String.Format("Enumerable does not have the right set of elements during Serial Deletion. i = {0}, maxSize = {1}. {2} vs {3}",
i,
maxSize,
String.Join(", ", hashSet.Select(item => item.Ord.ToString())),
String.Join(", ", heap.Select(item => item.Ord.ToString()))
));
}
} catch (Exception ex)
{
throw new Exception("Failure during Serial Deletion: " + ex.Message, ex);
}
}
}
