public async Task when_processing_the_query()
{
FakeQueryTypeCollection = new Mock <IQueryTypeCollection>();
FakeServiceProvider = new Mock <IServiceProvider>();
Subject = new QueryProcessor(FakeQueryTypeCollection.Object, FakeServiceProvider.Object);
async Task should_invoke_the_correct_query_handler_and_return_a_result()
{
FakeQuery expectedQuery = null;
var expectedResult = new FakeResult();
var fakeQueryHandler = new FakeQueryHandler(x => { expectedQuery = x; return(expectedResult); });
FakeServiceProvider.Setup(x => x.GetService(typeof(IEnumerable <IQueryHandler <FakeQuery, FakeResult> >))).Returns(new[] { fakeQueryHandler });
var query = new FakeQuery();
var result = await Subject.ProcessAsync(query);
query.Should().Be(expectedQuery);
result.Should().Be(expectedResult);
}
void should_throw_exception_if_the_query_handler_is_not_found()
{
var query = new Mock <IQuery <FakeResult> >().Object;
Subject.Awaiting(x => x.ProcessAsync(query)).Should()
.Throw <QueryProcessorException>()
.WithMessage($"The query handler for '{query}' could not be found");
}
void should_throw_exception_if_multiple_query_handlers_are_found()
{
var handlerType = typeof(IQueryHandler <FakeMultiQuery1, FakeResult>);
var enumerableType = typeof(IEnumerable <IQueryHandler <FakeMultiQuery1, FakeResult> >);
FakeServiceProvider.Setup(x => x.GetService(enumerableType)).Returns(new[] { new Mock <IQueryHandler <FakeMultiQuery1, FakeResult> >().Object, new Mock <IQueryHandler <FakeMultiQuery1, FakeResult> >().Object });
var query = new FakeMultiQuery1();
Subject.Awaiting(x => x.ProcessAsync(query)).Should()
.Throw <QueryProcessorException>()
.WithMessage($"Multiple query handlers for '{handlerType}' was found");
}
}
public Task <FakeResult> HandleAsync(FakeMultiQuery1 query)
{
throw new NotImplementedException();
}
