public static void TestExceptions()
{
var dictionary = new NonBlocking.ConcurrentDictionary <string, int>();
Assert.Throws <ArgumentNullException>(
() => dictionary.TryAdd(null, 0));
// "TestExceptions: FAILED. TryAdd didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.ContainsKey(null));
// "TestExceptions: FAILED. Contains didn't throw ANE when null key is passed");
int item;
Assert.Throws <ArgumentNullException>(
() => dictionary.TryRemove(null, out item));
// "TestExceptions: FAILED. TryRemove didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.TryGetValue(null, out item));
// "TestExceptions: FAILED. TryGetValue didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => { var x = dictionary[null]; });
// "TestExceptions: FAILED. this[] didn't throw ANE when null key is passed");
Assert.Throws <KeyNotFoundException>(
() => { var x = dictionary["1"]; });
// "TestExceptions: FAILED. this[] TryGetValue didn't throw KeyNotFoundException!");
Assert.Throws <ArgumentNullException>(
() => dictionary[null] = 1);
// "TestExceptions: FAILED. this[] didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.GetOrAdd(null, (k) => 0));
// "TestExceptions: FAILED. GetOrAdd didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.GetOrAdd("1", null));
// "TestExceptions: FAILED. GetOrAdd didn't throw ANE when null valueFactory is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.GetOrAdd(null, 0));
// "TestExceptions: FAILED. GetOrAdd didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.AddOrUpdate(null, (k) => 0, (k, v) => 0));
// "TestExceptions: FAILED. AddOrUpdate didn't throw ANE when null key is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.AddOrUpdate("1", null, (k, v) => 0));
// "TestExceptions: FAILED. AddOrUpdate didn't throw ANE when null updateFactory is passed");
Assert.Throws <ArgumentNullException>(
() => dictionary.AddOrUpdate(null, (k) => 0, null));
// "TestExceptions: FAILED. AddOrUpdate didn't throw ANE when null addFactory is passed");
dictionary.TryAdd("1", 1);
Assert.Throws <ArgumentException>(
() => ((IDictionary <string, int>)dictionary).Add("1", 2));
// "TestExceptions: FAILED. IDictionary didn't throw AE when duplicate key is passed");
}
private static void TestGetOrAddOrUpdate(int cLevel, int initSize, int threads, int addsPerThread, bool isAdd)
{
NonBlocking.ConcurrentDictionary <int, int> dict = new NonBlocking.ConcurrentDictionary <int, int>(cLevel, 1);
int count = threads;
using (ManualResetEvent mre = new ManualResetEvent(false))
{
for (int i = 0; i < threads; i++)
{
int ii = i;
Task.Run(
() =>
{
for (int j = 0; j < addsPerThread; j++)
{
if (isAdd)
{
//call either of the two overloads of GetOrAdd
if (j + ii % 2 == 0)
{
dict.GetOrAdd(j, -j);
}
else
{
dict.GetOrAdd(j, x => - x);
}
}
else
{
if (j + ii % 2 == 0)
{
dict.AddOrUpdate(j, -j, (k, v) => - j);
}
else
{
dict.AddOrUpdate(j, (k) => - k, (k, v) => - k);
}
}
}
if (Interlocked.Decrement(ref count) == 0)
{
mre.Set();
}
});
}
mre.WaitOne();
}
foreach (var pair in dict)
{
Assert.Equal(pair.Key, -pair.Value);
}
List <int> gotKeys = new List <int>();
foreach (var pair in dict)
{
gotKeys.Add(pair.Key);
}
gotKeys.Sort();
List <int> expectKeys = new List <int>();
for (int i = 0; i < addsPerThread; i++)
{
expectKeys.Add(i);
}
Assert.Equal(expectKeys.Count, gotKeys.Count);
for (int i = 0; i < expectKeys.Count; i++)
{
Assert.True(expectKeys[i].Equals(gotKeys[i]),
String.Format("* Test '{4}': Level={0}, initSize={1}, threads={2}, addsPerThread={3})" + Environment.NewLine +
"> FAILED. The set of keys in the dictionary is are not the same as the expected.",
cLevel, initSize, threads, addsPerThread, isAdd ? "GetOrAdd" : "GetOrUpdate"));
}
// Finally, let's verify that the count is reported correctly.
Assert.Equal(addsPerThread, dict.Count);
Assert.Equal(addsPerThread, dict.ToArray().Length);
}