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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if DESKTOPCLR40
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Threading;
namespace Tests
{
public partial class AsyncTests
{
[TestMethod]
public void ToAsyncEnumerable_Null()
{
AssertThrows<ArgumentNullException>(() => AsyncEnumerable.ToAsyncEnumerable<int>(default(IEnumerable<int>)));
AssertThrows<ArgumentNullException>(() => AsyncEnumerable.ToAsyncEnumerable<int>(default(IObservable<int>)));
}
[TestMethod]
public void ToAsyncEnumerable1()
{
var xs = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable();
var e = xs.GetEnumerator();
HasNext(e, 1);
HasNext(e, 2);
HasNext(e, 3);
HasNext(e, 4);
NoNext(e);
}
[TestMethod]
public void ToAsyncEnumerable2()
{
var ex = new Exception("Bang");
var xs = ToAsyncEnumerable_Sequence(ex).ToAsyncEnumerable();
var e = xs.GetEnumerator();
HasNext(e, 42);
AssertThrows<Exception>(() => e.MoveNext().Wait(), ex_ => ((AggregateException)ex_).InnerExceptions.Single() == ex);
}
private IEnumerable<int> ToAsyncEnumerable_Sequence(Exception e)
{
yield return 42;
throw e;
}
[TestMethod]
public void ToAsyncEnumerable3()
{
var subscribed = false;
var xs = new MyObservable<int>(obs =>
{
subscribed = true;
obs.OnNext(42);
obs.OnCompleted();
return new MyDisposable(() => { });
}).ToAsyncEnumerable();
Assert.IsFalse(subscribed);
var e = xs.GetEnumerator();
Assert.IsTrue(subscribed);
HasNext(e, 42);
NoNext(e);
}
[TestMethod]
public void ToAsyncEnumerable4()
{
var ex = new Exception("Bang!");
var subscribed = false;
var xs = new MyObservable<int>(obs =>
{
subscribed = true;
obs.OnError(ex);
return new MyDisposable(() => { });
}).ToAsyncEnumerable();
Assert.IsFalse(subscribed);
var e = xs.GetEnumerator();
Assert.IsTrue(subscribed);
AssertThrows<Exception>(() => e.MoveNext().Wait(), ex_ => ((AggregateException)ex_).InnerExceptions.Single() == ex);
}
class MyObservable<T> : IObservable<T>
{
private Func<IObserver<T>, IDisposable> _subscribe;
public MyObservable(Func<IObserver<T>, IDisposable> subscribe)
{
_subscribe = subscribe;
}
public IDisposable Subscribe(IObserver<T> observer)
{
return _subscribe(observer);
}
}
class MyDisposable : IDisposable
{
private Action _dispose;
public MyDisposable(Action dispose)
{
_dispose = dispose;
}
public void Dispose()
{
_dispose();
}
}
[TestMethod]
public void ToEnumerable_Null()
{
AssertThrows<ArgumentNullException>(() => AsyncEnumerable.ToEnumerable<int>(null));
}
[TestMethod]
public void ToEnumerable1()
{
var xs = AsyncEnumerable.Return(42).ToEnumerable();
Assert.IsTrue(xs.SequenceEqual(new[] { 42 }));
}
[TestMethod]
public void ToEnumerable2()
{
var xs = AsyncEnumerable.Empty<int>().ToEnumerable();
Assert.IsTrue(xs.SequenceEqual(new int[0]));
}
[TestMethod]
public void ToEnumerable3()
{
var ex = new Exception("Bang");
var xs = AsyncEnumerable.Throw<int>(ex).ToEnumerable();
AssertThrows<Exception>(() => xs.GetEnumerator().MoveNext(), ex_ => ((AggregateException)ex_).InnerExceptions.Single() == ex);
}
#if !NO_RXINTERFACES
[TestMethod]
public void ToObservable_Null()
{
AssertThrows<ArgumentNullException>(() => AsyncEnumerable.ToObservable<int>(null));
}
[TestMethod]
public void ToObservable1()
{
var fail = false;
var evt = new ManualResetEvent(false);
var xs = AsyncEnumerable.Empty<int>().ToObservable();
xs.Subscribe(new MyObserver<int>(
x =>
{
fail = true;
},
ex =>
{
fail = true;
evt.Set();
},
() =>
{
evt.Set();
}
));
evt.WaitOne();
Assert.IsFalse(fail);
}
[TestMethod]
public void ToObservable2()
{
var lst = new List<int>();
var fail = false;
var evt = new ManualResetEvent(false);
var xs = AsyncEnumerable.Return(42).ToObservable();
xs.Subscribe(new MyObserver<int>(
x =>
{
lst.Add(x);
},
ex =>
{
fail = true;
evt.Set();
},
() =>
{
evt.Set();
}
));
evt.WaitOne();
Assert.IsFalse(fail);
Assert.IsTrue(lst.SequenceEqual(new[] { 42 }));
}
[TestMethod]
public void ToObservable3()
{
var lst = new List<int>();
var fail = false;
var evt = new ManualResetEvent(false);
var xs = AsyncEnumerable.Range(0, 10).ToObservable();
xs.Subscribe(new MyObserver<int>(
x =>
{
lst.Add(x);
},
ex =>
{
fail = true;
evt.Set();
},
() =>
{
evt.Set();
}
));
evt.WaitOne();
Assert.IsFalse(fail);
Assert.IsTrue(lst.SequenceEqual(Enumerable.Range(0, 10)));
}
[TestMethod]
public void ToObservable4()
{
var ex1 = new Exception("Bang!");
var ex_ = default(Exception);
var fail = false;
var evt = new ManualResetEvent(false);
var xs = AsyncEnumerable.Throw<int>(ex1).ToObservable();
xs.Subscribe(new MyObserver<int>(
x =>
{
fail = true;
},
ex =>
{
ex_ = ex;
evt.Set();
},
() =>
{
fail = true;
evt.Set();
}
));
evt.WaitOne();
Assert.IsFalse(fail);
Assert.AreEqual(ex1, ((AggregateException)ex_).InnerExceptions.Single());
}
class MyObserver<T> : IObserver<T>
{
private Action<T> _onNext;
private Action<Exception> _onError;
private Action _onCompleted;
public MyObserver(Action<T> onNext, Action<Exception> onError, Action onCompleted)
{
_onNext = onNext;
_onError = onError;
_onCompleted = onCompleted;
}
public void OnCompleted()
{
_onCompleted();
}
public void OnError(Exception error)
{
_onError(error);
}
public void OnNext(T value)
{
_onNext(value);
}
}
#endif
}
}
#endif
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