public async Task TestQueueChannel_SeveralResults_ReturnsMostPrioritized()
{
// Arrange
var channel = new SimpleTestQueueChannel(new [] { "a", "b" }, TimeSpan.FromSeconds(3));
var ct = new CancellationTokenSource();
ct.CancelAfter(TimeSpan.FromSeconds(5));
await channel.Start(ct.Token);
const string valueToSet_A = "hello_a";
const string valueToSet_B = "hello_b";
channel.AddValue("b", valueToSet_B);
channel.AddValue("a", valueToSet_A);
// Act
var item = await channel.GetNextItem(TimeSpan.FromSeconds(1));
ct.Cancel();
// Assert
Assert.Equal(valueToSet_A, item);
Assert.Single(channel.PutBackItems["b"]);
}
public async Task TestQueueChannel_SetResult_ReturnsIt()
{
// Arrange
var channel = new SimpleTestQueueChannel(new [] { "a", "b" }, TimeSpan.FromSeconds(3));
var ct = new CancellationTokenSource();
ct.CancelAfter(TimeSpan.FromSeconds(10));
await channel.Start(ct.Token);
// Act
const string valueToSet = "hello_b";
Task.Factory.StartNew(async() =>
{
await Task.Delay(TimeSpan.FromSeconds(2));
channel.AddValue("b", valueToSet);
}, TaskCreationOptions.LongRunning);
var item = await channel.GetNextItem(TimeSpan.FromSeconds(1));
ct.Cancel();
// Assert
Assert.Equal(valueToSet, item);
}
public async Task TestQueueChannel_SeveralResults_PrioritizedSetLaterButWithinWindow_ReturnsMostPrioritized()
{
// Arrange
TimeSpan initialDelay = TimeSpan.FromSeconds(3); // Time during which the window will be opened, no matter if some tasks are ready
var channel = new SimpleTestQueueChannel(new [] { "a", "b" }, TimeSpan.FromSeconds(4));
var ct = new CancellationTokenSource();
ct.CancelAfter(TimeSpan.FromSeconds(50));
await channel.Start(ct.Token);
const string valueToSet_A = "hello_a";
const string valueToSet_B = "hello_b";
channel.AddValue("b", valueToSet_B);
Task.Factory.StartNew(async() =>
{
// Waiting for some time less than initial delay
await Task.Delay(TimeSpan.FromSeconds(2));
channel.AddValue("a", valueToSet_A);
});
// Act
var item = await channel.GetNextItem(initialDelay);
ct.Cancel();
// Assert
Assert.Equal(valueToSet_A, item);
Assert.Single(channel.PutBackItems["b"]);
}
public async Task TestQueueChannel_NewerReturns()
{
// Arrange
var channel = new SimpleTestQueueChannel(new [] { "a", "b" }, TimeSpan.FromSeconds(1));
var ct = new CancellationTokenSource();
ct.CancelAfter(TimeSpan.FromSeconds(5));
await channel.Start(ct.Token);
// Act
var item = await channel.GetNextItem(TimeSpan.FromSeconds(1));
ct.Cancel();
// Assert
Assert.Null(item);
}
public async Task TestQueueChannel_ResultFromPrevIteration_ReturnsIt()
{
// Arrange
var channel = new SimpleTestQueueChannel(new [] { "a", "b" }, TimeSpan.FromSeconds(3));
var ct = new CancellationTokenSource();
ct.CancelAfter(TimeSpan.FromSeconds(5));
await channel.Start(ct.Token);
const string valueToSet = "hello_b";
channel.AddValue("b", valueToSet);
// Act
var item = await channel.GetNextItem(TimeSpan.FromSeconds(1));
ct.Cancel();
// Assert
Assert.Equal(valueToSet, item);
}
