public void B_TestOutOfMemory()
{
var wht = TestWeakDictionaryBehavior.CreateDictionary();
int OOMECount = 0;
for (int i = 0; i < 1024 * 24 + 32; i++) // total requested Mem. > 24GB
{
try
{
wht.Add(new BigObject(i), i);
if (i % 1024 == 0)
{
Console.WriteLine("Requested Mem: " + i.ToString() + " MB");
}
OOMECount = 0;
}
catch (OutOfMemoryException oom)
{
if (OOMECount++ > 10)
{
throw new Exception("Memory Allocation Error in B_TestOutOfMemory");
}
//Try Again. GC will eventually release some memory.
Console.WriteLine("OOME WHEN i=" + i.ToString() + ". Try Again");
System.Threading.Thread.Sleep(10);
i--;
continue;
}
}
GC.Collect();
Console.WriteLine("Passed out of memory exception.");
}
public void A_TestBasicOps()
{
ConditionalWeakTableWrapper <object, object> weakDictionary = TestWeakDictionaryBehavior.CreateDictionary();// new SupportClass.TjWeakHashTable();
Hashtable realHashTable = new Hashtable();
SmallObject[] so = new SmallObject[100];
for (int i = 0; i < 20000; i++)
{
SmallObject key = new SmallObject(i);
SmallObject value = key;
so[i / 200] = key;
realHashTable.Add(key, value);
weakDictionary.Add(key, value);
}
Assert.AreEqual(weakDictionary.Count, realHashTable.Count);
var keys = realHashTable.Keys;
foreach (SmallObject key in keys)
{
Assert.AreEqual(((SmallObject)realHashTable[key]).i,
((SmallObject)weakDictionary[key]).i);
Assert.IsTrue(realHashTable[key].Equals(weakDictionary[key]));
}
var values1 = weakDictionary.Values;
var values2 = realHashTable.Values;
Assert.AreEqual(values1.Length, values2.Count);
realHashTable.Remove(new SmallObject(10000));
weakDictionary.Remove(new SmallObject(10000));
Assert.AreEqual(weakDictionary.Count, 20000);
Assert.AreEqual(realHashTable.Count, 20000);
for (int i = 0; i < so.Length; i++)
{
realHashTable.Remove(so[i]);
weakDictionary.Remove(so[i]);
Assert.AreEqual(weakDictionary.Count, 20000 - i - 1);
Assert.AreEqual(realHashTable.Count, 20000 - i - 1);
}
//After removals, compare the collections again.
var keys2 = realHashTable.Keys;
foreach (SmallObject o in keys2)
{
Assert.AreEqual(((SmallObject)realHashTable[o]).i,
((SmallObject)weakDictionary[o]).i);
Assert.IsTrue(realHashTable[o].Equals(weakDictionary[o]));
}
}
public void C_TestMemLeakage()
{
var wht = TestWeakDictionaryBehavior.CreateDictionary(); //new SupportClass.TjWeakHashTable();
GC.Collect();
int initialMemUsage = GetMemUsageInKB();
Console.WriteLine("Initial MemUsage=" + initialMemUsage);
for (int i = 0; i < 10000; i++)
{
wht.Add(new BigObject(i), i);
if (i % 100 == 0)
{
int mu = GetMemUsageInKB();
Console.WriteLine(i.ToString() + ") MemUsage=" + mu);
}
}
GC.Collect();
int memUsage = GetMemUsageInKB();
Assert.IsFalse(memUsage > initialMemUsage * 2, "Memory Leakage.MemUsage = " + memUsage);
}
public void Setup()
{
dictionary = TestWeakDictionaryBehavior.CreateDictionary();
}