// Ex 4: Create custom exception
public void Ex4_CustomException()
{
string basepath = @"..\..\..\TmpDat";
string filepath = Path.Combine(basepath, "OrderProcessingException.dat");
// Serialize exception
OrderProcessingException ope = new OrderProcessingException(7, "Serialize example");
IFormatter formatter = new BinaryFormatter();
using (FileStream fs = new FileStream(filepath, FileMode.Create))
{
formatter.Serialize(fs, ope);
}
// Deserialize exception
using (FileStream fs = new FileStream(filepath, FileMode.Open))
{
OrderProcessingException opeDerialized = (OrderProcessingException)formatter.Deserialize(fs);
Console.WriteLine("Exception: {0}", opeDerialized.OrderId);
}
}
public void HandleSubmitOrderForProductionAsyncThrowsWhenOrderSubmissionThrowsAndTheRetryThrows()
{
var mockClock = new Mock <IClock>();
var mockSubmitter = new Mock <IOrderSubmitter>();
var mockSubmitPublisher = new Mock <ICommandPublisher <SubmitOrderForProduction> >();
var mockFailurePublisher = new Mock <ICommandPublisher <NotifyOfFatalFailure> >();
var mockEventPublisher = new Mock <IEventPublisher <EventBase> >();
var mockLogger = new Mock <ILogger>();
var mockLifetimeScope = new Mock <IDisposable>();
var serializerSettings = new JsonSerializerSettings();
var serializer = new JsonSerializer {
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var processorFunctions = new TestOrderSubmitterFunctions(serializer, new CommandRetryThresholds(1, 1, 1), mockClock.Object, mockSubmitter.Object, mockSubmitPublisher.Object, mockFailurePublisher.Object, mockEventPublisher.Object, mockLogger.Object, mockLifetimeScope.Object);
var expectedException = new OrderProcessingException();
serializer.Converters.Add(new StringEnumConverter());
serializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
serializerSettings.Converters.Add(new StringEnumConverter());
mockLogger
.Setup(logger => logger.ForContext(It.IsAny <string>(), It.IsAny <object>(), It.IsAny <bool>()))
.Returns(mockLogger.Object);
mockSubmitPublisher
.Setup(publisher => publisher.PublishAsync(It.IsAny <SubmitOrderForProduction>(), It.Is <Instant?>(value => value.HasValue)))
.Throws(expectedException);
mockSubmitter
.Setup(processor => processor.SubmitOrderForProductionAsync(It.IsAny <string>(),
It.IsAny <string>(),
It.IsAny <DependencyEmulation>(),
It.IsAny <string>()))
.ThrowsAsync(new ApplicationException());
var command = new SubmitOrderForProduction
{
Id = Guid.NewGuid(),
CorrelationId = "ABC",
PartnerCode = "Bob",
OrderId = "123",
OccurredTimeUtc = new DateTime(2017, 12, 09, 9, 0, 0, DateTimeKind.Utc)
};
using (var memStream = new MemoryStream())
using (var writer = new StreamWriter(memStream))
using (var jsonWriter = new JsonTextWriter(writer))
{
serializer.Serialize(jsonWriter, command);
jsonWriter.Flush();
memStream.Seek(0, SeekOrigin.Begin);
using (var message = new BrokeredMessage(memStream))
{
message.ContentType = MimeTypes.Json;
message.CorrelationId = Guid.NewGuid().ToString();
message.MessageId = Guid.NewGuid().ToString();
Action actionUnderTest = () => processorFunctions.HandleSubmitOrderForProductionAsync(message).GetAwaiter().GetResult();
actionUnderTest.ShouldThrow <OrderProcessingException>("because the command retry publishing experienced an exception")
.Subject.SingleOrDefault().Should().Be(expectedException, "because the exception should bubble");
}
jsonWriter.Close();
writer.Close();
memStream.Close();
}
}
public void HandleSubmitOrderForProductionAsyncThrowsWhenOrderSubmissionFailsAndIsNotRetried()
{
var mockClock = new Mock <IClock>();
var mockSubmitter = new Mock <IOrderSubmitter>();
var mockSubmitPublisher = new Mock <ICommandPublisher <SubmitOrderForProduction> >();
var mockFailurePublisher = new Mock <ICommandPublisher <NotifyOfFatalFailure> >();
var mockEventPublisher = new Mock <IEventPublisher <EventBase> >();
var mockLogger = new Mock <ILogger>();
var mockLifetimeScope = new Mock <IDisposable>();
var serializerSettings = new JsonSerializerSettings();
var serializer = new JsonSerializer {
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var processorFunctions = new TestOrderSubmitterFunctions(serializer, new CommandRetryThresholds(-1, 0, 0), mockClock.Object, mockSubmitter.Object, mockSubmitPublisher.Object, mockFailurePublisher.Object, mockEventPublisher.Object, mockLogger.Object, mockLifetimeScope.Object);
var expectedException = new OrderProcessingException();
serializer.Converters.Add(new StringEnumConverter());
serializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
serializerSettings.Converters.Add(new StringEnumConverter());
mockLogger
.Setup(logger => logger.ForContext(It.IsAny <string>(), It.IsAny <object>(), It.IsAny <bool>()))
.Returns(mockLogger.Object);
mockSubmitter
.Setup(processor => processor.SubmitOrderForProductionAsync(It.IsAny <string>(),
It.IsAny <string>(),
It.IsAny <DependencyEmulation>(),
It.IsAny <string>()))
.ReturnsAsync(OperationResult.ExceptionResult);
var command = new SubmitOrderForProduction
{
Id = Guid.NewGuid(),
CorrelationId = "ABC",
PartnerCode = "Bob",
OrderId = "123",
OccurredTimeUtc = new DateTime(2017, 12, 09, 9, 0, 0, DateTimeKind.Utc)
};
using (var memStream = new MemoryStream())
using (var writer = new StreamWriter(memStream))
using (var jsonWriter = new JsonTextWriter(writer))
{
serializer.Serialize(jsonWriter, command);
jsonWriter.Flush();
memStream.Seek(0, SeekOrigin.Begin);
using (var message = new BrokeredMessage(memStream))
{
message.ContentType = MimeTypes.Json;
message.CorrelationId = Guid.NewGuid().ToString();
message.MessageId = Guid.NewGuid().ToString();
Action actionUnderTest = () => processorFunctions.HandleSubmitOrderForProductionAsync(message).GetAwaiter().GetResult();
actionUnderTest.ShouldThrow <FailedtoHandleCommandException>("because the order submitter failed to submit the order");
}
jsonWriter.Close();
writer.Close();
memStream.Close();
};
mockFailurePublisher.Verify(publisher => publisher.TryPublishAsync(It.IsAny <NotifyOfFatalFailure>(), It.Is <Instant?>(value => value == null)),
Times.Once,
"The failure notification should have been published because the command wasn't eligible for retries");
}