public async Task HandlesExceptionsThrownImmediatelyByInnerPublisher()
{
const int expectedResult = 42;
var exceptionToThrow = new PublishException();
var exceptionsThrown = new List <Exception>();
var innerPublisher = Substitute.For <IResultPublisher>();
innerPublisher.Publish(Arg.Any <Result <int, int> >())
.Throws(exceptionToThrow);
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { exceptionsThrown.Add(ex); });
var mock = Substitute.For <IControlCandidate <int, string> >();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
using (Swap.Publisher(fireAndForgetPublisher))
{
var result = Scientist.Science <int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
}
await fireAndForgetPublisher.WhenPublished();
Assert.Equal(new List <Exception> {
exceptionToThrow
}, exceptionsThrown);
}
public async Task PublishesAsynchronously()
{
const int expectedResult = 42;
var pendingPublishTask = new TaskCompletionSource <object>();
// Create a new publisher that will delay all
// publishing to account for this test.
var innerPublisher = Substitute.For <IResultPublisher>();
innerPublisher.Publish(Arg.Any <Result <int, int> >())
.Returns(call => pendingPublishTask.Task);
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { });
var mock = Substitute.For <IControlCandidate <int, string> >();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
const int count = 10;
using (Swap.Publisher(fireAndForgetPublisher))
{
Parallel.ForEach(
Enumerable.Repeat(0, count),
src =>
{
var result = Scientist.Science <int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
Assert.Equal(expectedResult, result);
});
}
// Make sure that the above science calls are still publishing.
Task whenPublished = fireAndForgetPublisher.WhenPublished();
Assert.NotNull(whenPublished);
// Ensure that the mock was called before the when published task has completed.
mock.Received(count).Control();
mock.Received(count).Candidate();
Assert.False(whenPublished.IsCompleted, "When Published Task completed early.");
pendingPublishTask.SetResult(null);
await whenPublished;
Assert.True(whenPublished.IsCompleted, "When Published Task isn't complete.");
}
public async Task PublishesAsynchronously()
{
const int expectedResult = 42;
var pendingPublishTask = new TaskCompletionSource<object>();
// Create a new publisher that will delay all
// publishing to account for this test.
var innerPublisher = Substitute.For<IResultPublisher>();
innerPublisher.Publish(Arg.Any<Result<int, int>>())
.Returns(call => pendingPublishTask.Task);
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { });
var mock = Substitute.For<IControlCandidate<int, string>>();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
const int count = 10;
using (Swap.Publisher(fireAndForgetPublisher))
{
Parallel.ForEach(
Enumerable.Repeat(0, count),
src =>
{
var result = Scientist.Science<int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
Assert.Equal(expectedResult, result);
});
}
// Make sure that the above science calls are still publishing.
Task whenPublished = fireAndForgetPublisher.WhenPublished();
Assert.NotNull(whenPublished);
// Ensure that the mock was called before the when published task has completed.
mock.Received(count).Control();
mock.Received(count).Candidate();
Assert.False(whenPublished.IsCompleted, "When Published Task completed early.");
pendingPublishTask.SetResult(null);
await whenPublished;
Assert.True(whenPublished.IsCompleted, "When Published Task isn't complete.");
}
public async Task HandlesDelayedExceptionsThrownByInnerPublisher()
{
const int expectedResult = 42;
var exceptionToThrow = new PublishException();
var exceptionsThrown = new List <Exception>();
var pendingPublishTask = new TaskCompletionSource <object>();
var innerPublisher = Substitute.For <IResultPublisher>();
innerPublisher.Publish(Arg.Any <Result <int, int> >())
.Returns(call => pendingPublishTask.Task.ContinueWith(_ => { throw exceptionToThrow; }));
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { exceptionsThrown.Add(ex); });
var mock = Substitute.For <IControlCandidate <int, string> >();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
using (Swap.Publisher(fireAndForgetPublisher))
{
var result = Scientist.Science <int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
}
var whenPublished = fireAndForgetPublisher.WhenPublished();
Assert.False(whenPublished.IsCompleted, "When Published Task completed early.");
pendingPublishTask.SetResult(null);
await whenPublished;
Assert.True(whenPublished.IsCompleted, "When Published Task isn't complete.");
Assert.Equal(new List <Exception> {
exceptionToThrow
}, exceptionsThrown);
}
public async Task HandlesDelayedExceptionsThrownByInnerPublisher()
{
const int expectedResult = 42;
var exceptionToThrow = new PublishException();
var exceptionsThrown = new List<Exception>();
var pendingPublishTask = new TaskCompletionSource<object>();
var innerPublisher = Substitute.For<IResultPublisher>();
innerPublisher.Publish(Arg.Any<Result<int, int>>())
.Returns(call => pendingPublishTask.Task.ContinueWith(_ => { throw exceptionToThrow; }));
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { exceptionsThrown.Add(ex); });
var mock = Substitute.For<IControlCandidate<int, string>>();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
using (Swap.Publisher(fireAndForgetPublisher))
{
var result = Scientist.Science<int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
}
var whenPublished = fireAndForgetPublisher.WhenPublished();
Assert.False(whenPublished.IsCompleted, "When Published Task completed early.");
pendingPublishTask.SetResult(null);
await whenPublished;
Assert.True(whenPublished.IsCompleted, "When Published Task isn't complete.");
Assert.Equal(new List<Exception> { exceptionToThrow }, exceptionsThrown);
}
public async Task HandlesExceptionsThrownImmediatelyByInnerPublisher()
{
const int expectedResult = 42;
var exceptionToThrow = new PublishException();
var exceptionsThrown = new List<Exception>();
var innerPublisher = Substitute.For<IResultPublisher>();
innerPublisher.Publish(Arg.Any<Result<int, int>>())
.Throws(exceptionToThrow);
var fireAndForgetPublisher = new FireAndForgetResultPublisher(innerPublisher, ex => { exceptionsThrown.Add(ex); });
var mock = Substitute.For<IControlCandidate<int, string>>();
mock.Control().Returns(expectedResult);
mock.Candidate().Returns(expectedResult);
using (Swap.Publisher(fireAndForgetPublisher))
{
var result = Scientist.Science<int>("myExperiment", experiment =>
{
experiment.Use(mock.Control);
experiment.Try(mock.Candidate);
});
}
await fireAndForgetPublisher.WhenPublished();
Assert.Equal(new List<Exception> { exceptionToThrow }, exceptionsThrown);
}