public void LoadMoreBasic()
{
int expectedNumberOfItems = 95;
CliMessagePump pump = new CliMessagePump(ConsoleProvider.Current, (k) => { });
TestLoadMoreDataSource dataSource = new TestLoadMoreDataSource(pump, expectedNumberOfItems, TimeSpan.FromMilliseconds(50));
var query = new CollectionQuery(0, 7, null);
List <object> viewedData = new List <object>();
pump.Start();
// the first call to GetDataView should return an empty result that indicates that the view is incomplete
// because it is still loading data
var initialDataView = dataSource.GetDataView(query);
Assert.IsFalse(initialDataView.IsViewComplete);
Assert.IsFalse(initialDataView.IsViewEndOfData);
Assert.AreEqual(0, initialDataView.Items.Count);
// Since we're simulating the server call and we know the max amount of time it can take wait twice that long
Thread.Sleep(dataSource.MaxDelay + dataSource.MaxDelay);
// Now there should be a full page of data available to us
var nextAttemptDataView = dataSource.GetDataView(query);
Assert.AreEqual(query.Take, nextAttemptDataView.Items.Count);
Assert.IsTrue(nextAttemptDataView.IsViewComplete);
Assert.IsFalse(nextAttemptDataView.IsViewEndOfData);
viewedData.AddRange(nextAttemptDataView.Items);
query.Skip += query.Take;
// now ask for data in a tight loop. Sometimes we will get more data, sometimes we'll get an empty page
// while more data is being loaded
while (nextAttemptDataView.IsViewEndOfData == false)
{
nextAttemptDataView = dataSource.GetDataView(query);
Console.WriteLine(nextAttemptDataView.Items.Count + " items, viewComplete == " + nextAttemptDataView.IsViewComplete);
if (nextAttemptDataView.Items.Count < query.Take && nextAttemptDataView.IsViewEndOfData == false)
{
Thread.Sleep(10);
Assert.IsFalse(nextAttemptDataView.IsViewComplete);
}
else if (nextAttemptDataView.Items.Count == query.Take)
{
Assert.IsTrue(nextAttemptDataView.IsViewComplete);
}
else if (nextAttemptDataView.Items.Count > query.Take)
{
Assert.Fail(nextAttemptDataView.Items.Count + " should never exceed " + query.Take);
}
viewedData.AddRange(nextAttemptDataView.Items);
query.Skip += nextAttemptDataView.Items.Count;
}
int nextExpectedId = 0;
foreach (var item in viewedData)
{
Assert.IsNotNull(item);
Console.WriteLine(item);
Assert.AreEqual(nextExpectedId++, ((Item)item).Id);
}
Assert.AreEqual(expectedNumberOfItems, viewedData.Count);
console.InputQueue.Enqueue(new ConsoleKeyInfo(' ', ConsoleKey.Escape, false, false, false));
}
public void LoadMoreBasic()
{
int expectedNumberOfItems = 95;
CliMessagePump pump = new CliMessagePump(ConsoleProvider.Current);
TestLoadMoreDataSource dataSource = new TestLoadMoreDataSource(pump, expectedNumberOfItems, TimeSpan.FromMilliseconds(50));
var query = new CollectionQuery(0, 7, null);
List<object> viewedData = new List<object>();
var pumpTask = pump.Start();
try
{
// make sure the pump has started up
Thread.Sleep(20);
// the first call to GetDataView should return an empty result that indicates that the view is incomplete
// because it is still loading data
var initialDataView = dataSource.GetDataView(query);
Assert.IsFalse(initialDataView.IsViewComplete);
Assert.IsFalse(initialDataView.IsViewEndOfData);
Assert.AreEqual(0, initialDataView.Items.Count);
// Since we're simulating the server call and we know the max amount of time it can take wait twice that long
Thread.Sleep(dataSource.MaxDelay + dataSource.MaxDelay);
// Now there should be a full page of data available to us
var nextAttemptDataView = dataSource.GetDataView(query);
Assert.AreEqual(query.Take, nextAttemptDataView.Items.Count);
Assert.IsTrue(nextAttemptDataView.IsViewComplete);
Assert.IsFalse(nextAttemptDataView.IsViewEndOfData);
viewedData.AddRange(nextAttemptDataView.Items);
query.Skip += query.Take;
// now ask for data in a tight loop. Sometimes we will get more data, sometimes we'll get an empty page
// while more data is being loaded
while (nextAttemptDataView.IsViewEndOfData == false)
{
nextAttemptDataView = dataSource.GetDataView(query);
Console.WriteLine(nextAttemptDataView.Items.Count + " items, viewComplete == " + nextAttemptDataView.IsViewComplete);
if (nextAttemptDataView.Items.Count < query.Take && nextAttemptDataView.IsViewEndOfData == false)
{
Thread.Sleep(10);
Assert.IsFalse(nextAttemptDataView.IsViewComplete);
}
else if (nextAttemptDataView.Items.Count == query.Take)
{
Assert.IsTrue(nextAttemptDataView.IsViewComplete);
}
else if (nextAttemptDataView.Items.Count > query.Take)
{
Assert.Fail(nextAttemptDataView.Items.Count + " should never exceed " + query.Take);
}
viewedData.AddRange(nextAttemptDataView.Items);
query.Skip += nextAttemptDataView.Items.Count;
}
int nextExpectedId = 0;
foreach (var item in viewedData)
{
Assert.IsNotNull(item);
Console.WriteLine(item);
Assert.AreEqual(nextExpectedId++, ((Item)item).Id);
}
Assert.AreEqual(expectedNumberOfItems, viewedData.Count);
console.Input.Enqueue(new ConsoleKeyInfo(' ', ConsoleKey.Escape, false, false, false));
} finally
{
pump.Stop();
pumpTask.Wait();
}
}