async void TestBoundedBlockingQueuePeek()
{
BoundedBlockingQueue <TestQueueItem> bbq = new BoundedBlockingQueue <TestQueueItem>(1);
Assert.Equal(0, bbq.Count);
bool tryPeekEmpty = bbq.TryPeek(out var testQueueItem);
Assert.False(tryPeekEmpty);
Assert.Null(testQueueItem);
TestQueueItem emptyItem = null;
Assert.Throws <InvalidOperationException>(() => emptyItem = bbq.Peek());
Assert.Null(emptyItem);
Assert.Throws <TimeoutException>(() => emptyItem = bbq.Peek(500, true));
Assert.Null(emptyItem);
Assert.Equal(0, bbq.Count);
bbq.Enqueue(new TestQueueItem {
Value = 100
});
Assert.Equal(1, bbq.Count);
var item100Peek = bbq.Peek();
Assert.Equal(1, bbq.Count);
Assert.Equal(100, item100Peek.Value);
var item100 = bbq.Dequeue();
Assert.Equal(0, bbq.Count);
Assert.Equal(100, item100.Value);
bool exceptionThrown = false;
TestQueueItem item200 = null;
Task.Run(() =>
{
try
{
item200 = bbq.Peek(5000, true);
}
catch
{
exceptionThrown = true;
}
});
bbq.Enqueue(new TestQueueItem {
Value = 200
});
await Task.Delay(2000);
Assert.Equal(1, bbq.Count);
Assert.Equal(200, item200.Value);
Assert.False(exceptionThrown);
bool tryPeekRes = bbq.TryPeek(out var item200TryPeek);
Assert.Equal(1, bbq.Count);
Assert.True(tryPeekRes);
Assert.Equal(200, item200.Value);
}
async void TestBoundedBlockingQueueClearDispose()
{
BoundedBlockingQueue <TestQueueItem> bbq = new BoundedBlockingQueue <TestQueueItem>(3);
bbq.TryEnqueue(new TestQueueItem {
Value = 100
});
bbq.Enqueue(new TestQueueItem {
Value = 200
});
Assert.Equal(2, bbq.Count);
bbq.Enqueue(new TestQueueItem {
Value = 300
});
Task.Run(async() =>
{
await Task.Delay(1000); //have to wait as new item will be enqueued immediately after clearing
bbq.Enqueue(new TestQueueItem {
Value = 400
});
});
bbq.Clear();
Assert.Equal(0, bbq.Count);
var result = bbq.TryDequeue(out var qItem);
Assert.False(result);
Assert.Null(qItem);
await Task.Delay(1500);
Assert.Equal(1, bbq.Count);
var item400 = bbq.Dequeue();
Assert.Equal(400, item400.Value);
Assert.Equal(0, bbq.Count);
bool threwObjectDisposedEx = false;
Task.Run(() =>
{
try
{
bbq.Dequeue();
}
catch (ObjectDisposedException ex)
{
threwObjectDisposedEx = true;
}
});
await Task.Delay(1500);
bbq.Dispose();
await Task.Delay(1500);
Assert.True(threwObjectDisposedEx);
Assert.True(bbq.IsDisposed);
Assert.Throws <ObjectDisposedException>(() => bbq.Count);
Assert.Throws <ObjectDisposedException>(() => bbq.Size);
Assert.Throws <ObjectDisposedException>(() => bbq.QueueSyncRoot);
Assert.Throws <ObjectDisposedException>(() => bbq.Values);
Assert.Throws <ObjectDisposedException>(() => bbq.IsReadOnly);
Assert.Throws <ObjectDisposedException>(() => bbq.Enqueue(new TestQueueItem {
Value = 1000
}));
Assert.False(bbq.TryEnqueue(new TestQueueItem {
Value = 1000
}));
Assert.Throws <ObjectDisposedException>(() => bbq.Peek());
var resTryPeek = bbq.TryPeek(out var itemPeek);
Assert.False(resTryPeek);
Assert.Null(itemPeek);
Assert.Throws <ObjectDisposedException>(() => bbq.Dequeue());
var resTryDeq = bbq.TryDequeue(out var itemDequeue);
Assert.False(resTryDeq);
Assert.Null(itemDequeue);
Assert.Throws <ObjectDisposedException>(() => bbq.Contains(new TestQueueItem {
Value = 1000
}));
Assert.Throws <ObjectDisposedException>(() => bbq.CopyTo(new TestQueueItem[3], 0));
Assert.Throws <ObjectDisposedException>(() => bbq.GetEnumerator());
Assert.Throws <ObjectDisposedException>(() => (bbq as IEnumerable).GetEnumerator());
}