public async Task Generate_EndToEnd() { // construct our TimerTrigger attribute ([TimerTrigger("00:00:02", RunOnStartup = true)]) Collection<ParameterDescriptor> parameters = new Collection<ParameterDescriptor>(); ParameterDescriptor parameter = new ParameterDescriptor("timerInfo", typeof(TimerInfo)); ConstructorInfo ctorInfo = typeof(TimerTriggerAttribute).GetConstructor(new Type[] { typeof(string) }); PropertyInfo runOnStartupProperty = typeof(TimerTriggerAttribute).GetProperty("RunOnStartup"); CustomAttributeBuilder attributeBuilder = new CustomAttributeBuilder( ctorInfo, new object[] { "00:00:02" }, new PropertyInfo[] { runOnStartupProperty }, new object[] { true }); parameter.CustomAttributes.Add(attributeBuilder); parameters.Add(parameter); // create the FunctionDefinition FunctionMetadata metadata = new FunctionMetadata(); TestInvoker invoker = new TestInvoker(); FunctionDescriptor function = new FunctionDescriptor("TimerFunction", invoker, metadata, parameters); Collection<FunctionDescriptor> functions = new Collection<FunctionDescriptor>(); functions.Add(function); // generate the Type Type functionType = FunctionGenerator.Generate("TestScriptHost", "TestFunctions", functions); // verify the generated function MethodInfo method = functionType.GetMethod("TimerFunction"); ParameterInfo triggerParameter = method.GetParameters()[0]; TimerTriggerAttribute triggerAttribute = triggerParameter.GetCustomAttribute<TimerTriggerAttribute>(); Assert.NotNull(triggerAttribute); // start the JobHost which will start running the timer function JobHostConfiguration config = new JobHostConfiguration() { TypeLocator = new TypeLocator(functionType) }; config.UseTimers(); JobHost host = new JobHost(config); await host.StartAsync(); await Task.Delay(3000); await host.StopAsync(); // verify our custom invoker was called Assert.True(invoker.InvokeCount >= 2); }