public async Task TryUpdateAsyncTest()
{
DictionaryChange change = null;
TransactedConcurrentDictionary <int, string> d = new TransactedConcurrentDictionary <int, string>(
new Uri("test://mocks", UriKind.Absolute),
(c) =>
{
change = c;
return(true);
}
);
using (var tx = _stateManager.CreateTransaction())
{
Assert.IsFalse((await d.TryUpdateAsync(tx, 1, "Two", "One")));
Assert.IsTrue(await d.TryAddAsync(tx, 1, "One"));
using (var tx2 = _stateManager.CreateTransaction())
{
await Assert.ThrowsExceptionAsync <TimeoutException>(
async() =>
{
await d.TryRemoveAsync(tx2, 1, timeout: TimeSpan.FromMilliseconds(20));
}
);
}
await tx.CommitAsync();
Assert.AreEqual("One", change.Added);
}
using (var tx = _stateManager.CreateTransaction())
{
Assert.IsFalse((await d.TryUpdateAsync(tx, 1, "Three", "Two")));
using (var tx2 = _stateManager.CreateTransaction())
{
Assert.IsTrue((await d.TryUpdateAsync(tx, 1, "Two", "One")));
}
await tx.CommitAsync();
Assert.AreEqual("Two", change.Added);
}
}