public async Task MonitorAdd_MultipleThreads()
{
// Good advice - Run without the debugger!!
// Blocks or failes
// Can succeed with the debugger and breakpoints in the "right" spots
var completedCount = 0;
var collection = new ObservableCollectionAsync <string>();
collection.CollectionChangedAsync += async(o, e) =>
{
await Task.Delay(1000);
completedCount++;
};
// Deadlock
List <Task> tasks = new List <Task>();
tasks.Add(Task.Run(() => collection.MonitorAddAsync("value")));
tasks.Add(Task.Run(() => collection.MonitorAddAsync("value")));
tasks.Add(Task.Run(() => collection.MonitorAddAsync("value")));
await Task.WhenAll(tasks);
Assert.AreEqual(3, completedCount);
}
public async Task SimpleAdd()
{
var completedCount = 0;
var collection = new ObservableCollectionAsync <string>();
collection.CollectionChangedAsync += async(o, e) =>
{
await Task.Delay(1000);
completedCount++;
};
await collection.AddAsync("value");
Assert.AreEqual(1, completedCount);
}
public async Task AutoResetEvent_MultipleThreads()
{
var completedCount = 0;
var collection = new ObservableCollectionAsync <string>();
collection.CollectionChangedAsync += async(o, e) =>
{
await Task.Delay(1000);
completedCount++;
};
List <Task> tasks = new List <Task>();
tasks.Add(Task.Run(() => collection.AddAsync("value")));
tasks.Add(Task.Run(() => collection.AddAsync("value")));
tasks.Add(Task.Run(() => collection.AddAsync("value")));
await Task.WhenAll(tasks);
Assert.AreEqual(3, completedCount);
}
public async Task SimpleAdd_MultipleThreads()
{
var completedCount = 0;
var collection = new ObservableCollectionAsync <string>();
collection.CollectionChangedAsync += async(o, e) =>
{
await Task.Delay(1000);
completedCount++;
};
// This should fail like AsyncEventTests.BusinessObject_Simple_MultipleThreads!!!
List <Task> tasks = new List <Task>();
tasks.Add(Task.Run(() => collection.AddAsync("value")));
tasks.Add(Task.Run(() => collection.AddAsync("value")));
tasks.Add(Task.Run(() => collection.AddAsync("value")));
await Task.WhenAll(tasks);
Assert.AreEqual(3, completedCount);
}
