public async Task RunAsync_should_execute_saga_runner()
{
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var types = (typeof(DummySaga), typeof(DummySagaState));
stateTypeResolver.Resolve <StartDummySaga>()
.Returns(types);
var runner = NSubstitute.Substitute.For <ISagaRunner <DummySaga, DummySagaState> >();
var sp = NSubstitute.Substitute.For <IServiceProvider>();
sp.GetService(typeof(ISagaRunner <DummySaga, DummySagaState>))
.Returns(runner);
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
typesCache.GetGeneric(typeof(ISagaRunner <,>), typeof(DummySaga), typeof(DummySagaState))
.Returns(typeof(ISagaRunner <DummySaga, DummySagaState>));
var sut = new SagasRunner(sp, stateTypeResolver, typesCache);
var message = StartDummySaga.New();
var messageContext = NSubstitute.Substitute.For <IMessageContext <StartDummySaga> >();
messageContext.Message.Returns(message);
await sut.RunAsync(messageContext);
await runner.Received(1)
.RunAsync(messageContext, Arg.Any <CancellationToken>());
}
public async Task RunAsync_should_throw_SagaNotFoundException_if_no_saga_registered_on_DI()
{
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var types = (typeof(DummySaga), typeof(DummySagaState));
stateTypeResolver.Resolve <StartDummySaga>()
.Returns(types);
var sp = NSubstitute.Substitute.For <IServiceProvider>();
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
typesCache.GetGeneric(typeof(ISagaRunner <,>), typeof(DummySaga), typeof(DummySagaState))
.Returns(typeof(ISagaRunner <DummySaga, DummySagaState>));
var sut = new SagasRunner(sp, stateTypeResolver, typesCache);
var message = StartDummySaga.New();
var messageContext = NSubstitute.Substitute.For <IMessageContext <StartDummySaga> >();
messageContext.Message.Returns(message);
var ex = await Assert.ThrowsAsync <SagaNotFoundException>(() => sut.RunAsync(messageContext));
ex.Message.Should().Contain("no saga registered on DI for message of type");
}
public async Task RunAsync_should_throw_if_message_null()
{
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var sp = NSubstitute.Substitute.For <IServiceScopeFactory>();
var sut = new SagasRunner(sp, stateTypeResolver, typesCache);
await Assert.ThrowsAsync <ArgumentNullException>(() => sut.RunAsync <StartDummySaga>(null));
}
public async Task RunAsync_should_do_nothing_when_no_runners_available()
{
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var sp = NSubstitute.Substitute.For <IServiceScopeFactory>();
var sut = new SagasRunner(sp, stateTypeResolver, typesCache);
var messageContext = NSubstitute.Substitute.For <IMessageContext <StartDummySaga> >();
var result = sut.RunAsync <StartDummySaga>(messageContext);
result.Should().Be(Task.CompletedTask);
}
public async Task RunAsync_should_throw_if_runner_fails()
{
var message = StartDummySaga.New();
var messageContext = NSubstitute.Substitute.For <IMessageContext <StartDummySaga> >();
messageContext.Message.Returns(message);
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var types = (typeof(DummySaga), typeof(DummySagaState));
stateTypeResolver.Resolve <StartDummySaga>()
.Returns(new[] { types });
var expectedException = new Exception("whoops");
var runner = NSubstitute.Substitute.For <ISagaRunner <DummySaga, DummySagaState> >();
runner.When(r => r.RunAsync(messageContext, Arg.Any <CancellationToken>()))
.Throw(expectedException);
var sp = NSubstitute.Substitute.For <IServiceProvider>();
sp.GetService(typeof(ISagaRunner <DummySaga, DummySagaState>))
.Returns(runner);
var scope = NSubstitute.Substitute.For <IServiceScope>();
scope.ServiceProvider.Returns(sp);
var scopeFactory = NSubstitute.Substitute.For <IServiceScopeFactory>();
scopeFactory.CreateScope().Returns(scope);
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
typesCache.GetGeneric(typeof(ISagaRunner <,>), typeof(DummySaga), typeof(DummySagaState))
.Returns(typeof(ISagaRunner <DummySaga, DummySagaState>));
var sut = new SagasRunner(scopeFactory, stateTypeResolver, typesCache);
var ex = await Assert.ThrowsAsync <AggregateException>(() => sut.RunAsync(messageContext));
ex.Message.Should().Contain("an error has occurred");
ex.InnerExceptions.Should().NotBeNullOrEmpty()
.And.HaveCount(1)
.And.Contain(e => e.Message == expectedException.Message);
}
public async Task RunAsync_should_throw_if_no_saga_registered()
{
var typesCache = NSubstitute.Substitute.For <ITypesCache>();
var stateTypeResolver = NSubstitute.Substitute.For <ISagaTypeResolver>();
var sp = NSubstitute.Substitute.For <IServiceProvider>();
var sut = new SagasRunner(sp, stateTypeResolver, typesCache);
var message = StartDummySaga.New();
var messageContext = NSubstitute.Substitute.For <IMessageContext <StartDummySaga> >();
messageContext.Message.Returns(message);
var ex = await Assert.ThrowsAsync <SagaNotFoundException>(() => sut.RunAsync(messageContext));
ex.Message.Should().Contain("no saga registered for message of type");
}