public void UseParallelExecution_configures_options(SqsLambdaConfigurator <TestMessage, TestMessageHandler> configurator, int maxDegreeOfParallelism)
        {
            configurator.Services.AddLogging().AddOptions();

            configurator.UseParallelExecution(maxDegreeOfParallelism);

            var sp = configurator.Services.BuildServiceProvider();

            var options = sp.GetService <IOptions <ParallelSqsExecutionOptions> >();

            Assert.That(options?.Value.MaxDegreeOfParallelism, Is.EqualTo(maxDegreeOfParallelism));
        }
        public void UseParallelExecution_registers_ParallelSqsEventHandler(int?maxDegreeOfParallelism, SqsLambdaConfigurator <TestMessage, TestMessageHandler> configurator)
        {
            configurator.Services.AddLogging().AddOptions();

            configurator.Services.AddTransient <ISerializer, SystemTextJsonSerializer>();

            configurator.UseParallelExecution(maxDegreeOfParallelism);

            var sp = configurator.Services.BuildServiceProvider();

            var handler = sp.GetService <IEventHandler <SQSEvent> >();

            Assert.That(handler, Is.InstanceOf <ParallelSqsEventHandler <TestMessage> >());
        }