/
QueuedUpdateReceiverTests.cs
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/
QueuedUpdateReceiverTests.cs
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using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Telegram.Bot.Polling;
using Telegram.Bot.Types;
using Xunit;
namespace Telegram.Bot.Tests.Unit.Polling.AsyncEnumerableReceivers;
public class QueuedUpdateReceiverTests
{
[Fact]
public void CallingGetEnumeratorTwiceThrows()
{
MockTelegramBotClient mockClient = new();
QueuedUpdateReceiver receiver = new(mockClient);
_ = receiver.GetAsyncEnumerator();
Assert.Throws<InvalidOperationException>(() => receiver.GetAsyncEnumerator());
}
[Fact]
public async Task ReceivesUpdatesInTheBackground()
{
MockTelegramBotClient mockClient = new("1", "2", "3");
QueuedUpdateReceiver receiver = new(mockClient);
Assert.Equal(3, mockClient.MessageGroupsLeft);
await foreach (Update update in receiver)
{
Assert.Equal("1", update.Message!.Text);
await Task.Delay(100);
break;
}
Assert.Equal(0, mockClient.MessageGroupsLeft);
Assert.Equal(2, receiver.PendingUpdates);
}
[Fact]
public async Task ReturnsReceivedPendingUpdates()
{
MockTelegramBotClient mockClient = new("foo-bar", "123", "one-two-three", "456");
QueuedUpdateReceiver receiver = new(mockClient);
mockClient.Options.RequestDelay = 250;
Assert.Equal(4, mockClient.MessageGroupsLeft);
Assert.Equal(0, receiver.PendingUpdates);
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator();
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(3, mockClient.MessageGroupsLeft);
Assert.Equal(1, receiver.PendingUpdates);
Assert.Equal("foo", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(3, mockClient.MessageGroupsLeft);
Assert.Equal(0, receiver.PendingUpdates);
Assert.Equal("bar", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(2, mockClient.MessageGroupsLeft);
Assert.Equal(0, receiver.PendingUpdates);
Assert.Equal("123", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(1, mockClient.MessageGroupsLeft);
Assert.Equal(2, receiver.PendingUpdates);
Assert.Equal("one", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(1, mockClient.MessageGroupsLeft);
Assert.Equal(1, receiver.PendingUpdates);
Assert.Equal("two", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(1, mockClient.MessageGroupsLeft);
Assert.Equal(0, receiver.PendingUpdates);
Assert.Equal("three", enumerator.Current.Message!.Text);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(0, mockClient.MessageGroupsLeft);
Assert.Equal(0, receiver.PendingUpdates);
Assert.Equal("456", enumerator.Current.Message!.Text);
}
[Fact]
public async Task ThrowsOnMoveNextIfCancelled()
{
MockTelegramBotClient mockClient = new("foo", "bar");
QueuedUpdateReceiver receiver = new(mockClient);
CancellationTokenSource cts = new();
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator(cts.Token);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal("foo", enumerator.Current.Message?.Text);
cts.Cancel();
await Assert.ThrowsAnyAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
}
[Fact]
public async Task DoesntReceiveAfterCancellation()
{
MockTelegramBotClient mockClient = new("foo", "bar", "foo");
QueuedUpdateReceiver receiver = new(mockClient);
mockClient.Options.RequestDelay = 200;
CancellationTokenSource cts = new();
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator(cts.Token);
Assert.True(await enumerator.MoveNextAsync());
Assert.Equal(2, mockClient.MessageGroupsLeft);
Assert.Equal("foo", enumerator.Current.Message?.Text);
cts.CancelAfter(50);
await Assert.ThrowsAnyAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
// ReSharper disable once MethodSupportsCancellation
await Task.Delay(500);
Assert.Equal(2, mockClient.MessageGroupsLeft);
}
[Fact]
public void ProvidingNullBotClientThrows()
{
Assert.Throws<ArgumentNullException>(() => new QueuedUpdateReceiver(botClient: null!));
}
[Fact]
public async Task MoveNextThrowsIfEnumeratorIsDisposed()
{
MockTelegramBotClient mockClient = new("foo");
QueuedUpdateReceiver receiver = new(mockClient);
IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator();
await enumerator.MoveNextAsync();
await enumerator.DisposeAsync();
await Assert.ThrowsAnyAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
}
[Fact]
public async Task ExceptionIsCaughtByErrorHandler()
{
MockTelegramBotClient mockClient = new() { Options = { ExceptionToThrow = new("Oops") } };
CancellationTokenSource cts = new();
bool seenException = false;
QueuedUpdateReceiver receiver = new(mockClient, pollingErrorHandler: (ex, _) =>
{
Assert.Same(mockClient.Options.ExceptionToThrow, ex);
seenException = true;
cts.Cancel();
return Task.CompletedTask;
});
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator(cts.Token);
await Assert.ThrowsAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
Assert.True(seenException);
}
[Fact]
public async Task ReceivingIsCanceledOnExceptionIfThereIsNoErrorHandler()
{
MockTelegramBotClient mockClient = new() { Options = { ExceptionToThrow = new("Oops") } };
QueuedUpdateReceiver receiver = new(mockClient);
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator();
await Assert.ThrowsAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
Exception exception = await Assert.ThrowsAsync<Exception>(async () => await enumerator.MoveNextAsync());
Assert.Same(mockClient.Options.ExceptionToThrow, exception.InnerException);
}
[Fact]
public async Task UncaughtExceptionIsStoredIfErrorHandlerThrows()
{
MockTelegramBotClient mockClient = new() { Options = { ExceptionToThrow = new("Oops") } };
Exception? exceptionFromErrorHandler = null;
QueuedUpdateReceiver receiver = new(mockClient, pollingErrorHandler: (ex, _) =>
{
Assert.Same(mockClient.Options.ExceptionToThrow, ex);
throw exceptionFromErrorHandler = new("Oops2");
});
await using IAsyncEnumerator<Update> enumerator = receiver.GetAsyncEnumerator();
await Assert.ThrowsAsync<OperationCanceledException>(async () => await enumerator.MoveNextAsync());
Exception exception = await Assert.ThrowsAsync<Exception>(async () => await enumerator.MoveNextAsync());
AggregateException aggregateException = Assert.IsType<AggregateException>(exception.InnerException);
Assert.NotNull(aggregateException);
Assert.Equal(2, aggregateException.InnerExceptions.Count);
Assert.Same(mockClient.Options.ExceptionToThrow, aggregateException.InnerExceptions[0]);
Assert.Same(exceptionFromErrorHandler, aggregateException.InnerExceptions[1]);
}
}