public async Task Reuses_CloudQueue_ForSameQueueName_OnConcurentCalls()
{
// prepare
const string queueName = "test-queue-1";
ConcurrentBag <CloudQueue> queueBag = new ConcurrentBag <CloudQueue>();
int count = 10;
List <Task> tasks = new List <Task>();
for (int i = 0; i < count; i++)
{
tasks.Add(Task.Run(async() => queueBag.Add(await _cloudQueueFactory.GetCloudQueue(queueName))));
}
// execute
await Task.WhenAll(tasks);
// check
// 10 queues created
Assert.Equal(10, queueBag.Count);
// all queues have the same name
foreach (var q in queueBag)
{
Assert.Equal(queueName, q.Name);
}
// all queues are the same object
var firstQueue = queueBag.First();
foreach (var q in queueBag)
{
Assert.True(object.ReferenceEquals(firstQueue, q));
}
// .CreateIfNotExistsAsync() is invoked exactly once
_cloudQueueClientMock.Received(1).GetQueueReference(Arg.Any <string>());
firstQueue.Received(1).CreateIfNotExistsAsync();
}