public async Task Handles_Many_Concurrent_Calls_Correctly_Without_Errors()
{
var tempDir = GetTempDirectory();
Log.DebugFormat("Temp directory: {0}", tempDir);
var fsSubscriptionService = new FilesystemSubscriptionTrackingService(tempDir);
await fsSubscriptionService.Init();
var topicNames = Enumerable.Range(0, 10)
.Select(i => new TopicName("Topic-" + i));
var subscriptions = topicNames
.SelectMany(t =>
Enumerable.Range(0, 100)
.Select(j => new Uri("http://localhost/subscriber-" + j))
.Select(s => new
{
Topic = t,
Subscriber = s
}))
.ToList();
await Task.WhenAll(subscriptions.Select(s => fsSubscriptionService.AddSubscription(s.Topic, s.Subscriber)));
var subscriptionsByTopic = subscriptions.GroupBy(s => s.Topic);
foreach (var grouping in subscriptionsByTopic)
{
var expectedSubscribers = grouping.Select(g => g.Subscriber).ToList();
var actualSubscribers = await fsSubscriptionService.GetSubscribers(grouping.Key);
Assert.That(actualSubscribers, Is.EquivalentTo(expectedSubscribers));
}
}
public async Task Subscriber_Should_Not_Be_Returned_After_It_Is_Removed()
{
var tempDir = GetTempDirectory();
Log.DebugFormat("Temp directory: {0}", tempDir);
var fsSubscriptionService = new FilesystemSubscriptionTrackingService(tempDir);
await fsSubscriptionService.Init();
var topic = "topic-0";
var subscriber = new Uri("http://localhost/platibus");
await fsSubscriptionService.AddSubscription(topic, subscriber);
var subscribers = await fsSubscriptionService.GetSubscribers(topic);
Assert.That(subscribers, Has.Member(subscriber));
await fsSubscriptionService.RemoveSubscription(topic, subscriber);
var subscribersAfterRemoval = await fsSubscriptionService.GetSubscribers(topic);
Assert.That(subscribersAfterRemoval, Has.No.Member(subscriber));
}
public async Task Expired_Subscription_Should_Not_Be_Returned()
{
var tempDir = GetTempDirectory();
Log.DebugFormat("Temp directory: {0}", tempDir);
var fsSubscriptionService = new FilesystemSubscriptionTrackingService(tempDir);
await fsSubscriptionService.Init();
var topic = "topic-0";
var subscriber = new Uri("http://localhost/platibus");
await fsSubscriptionService.AddSubscription(topic, subscriber, TimeSpan.FromMilliseconds(1));
await Task.Delay(TimeSpan.FromMilliseconds(100));
var subscribers = await fsSubscriptionService.GetSubscribers(topic);
Assert.That(subscribers, Has.No.Member(subscriber));
}
public async Task Existing_Subscriptions_Should_Be_Loaded_When_Initializing()
{
var tempDir = GetTempDirectory();
Log.DebugFormat("Temp directory: {0}", tempDir);
var fsSubscriptionService = new FilesystemSubscriptionTrackingService(tempDir);
await fsSubscriptionService.Init();
var topicNames = Enumerable.Range(0, 10)
.Select(i => new TopicName("Topic-" + i));
var subscriptions = topicNames
.SelectMany(t =>
Enumerable.Range(0, 100)
.Select(j => new Uri("http://localhost/subscriber-" + j))
.Select(s => new
{
Topic = t,
Subscriber = s
}))
.ToList();
await Task.WhenAll(subscriptions.Select(s => fsSubscriptionService.AddSubscription(s.Topic, s.Subscriber)));
// Next, initialize a new FilesystemSubscriptionService instance
// with the same directory and observe that the subscriptions
// are returned as expected.
var fsSubscriptionService2 = new FilesystemSubscriptionTrackingService(tempDir);
await fsSubscriptionService2.Init();
var subscriptionsByTopic = subscriptions.GroupBy(s => s.Topic);
foreach (var grouping in subscriptionsByTopic)
{
var expectedSubscribers = grouping.Select(g => g.Subscriber).ToList();
var actualSubscribers = await fsSubscriptionService2.GetSubscribers(grouping.Key);
Assert.That(actualSubscribers, Is.EquivalentTo(expectedSubscribers));
}
}