public void UniqueSlotName_ReturnsExpectedValue(string siteName, string slotName, string expectedValue)
        {
            var settingsManager = ScriptSettingsManager.Instance;

            var variables = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.AzureWebsiteName, siteName },
                { EnvironmentSettingNames.AzureWebsiteSlotName, slotName },
            };

            using (var tempVariables = new TestScopedEnvironmentVariable(variables))
            {
                Assert.Equal(expectedValue, ScriptSettingsManager.Instance.AzureWebsiteUniqueSlotName);
            }
        }
        public void GetUrl_ReturnsExpectedResult()
        {
            _hostSecrets.SystemKeys = new Dictionary <string, string>
            {
                { "testextension_extension", "abc123" }
            };

            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.AzureWebsiteHostName, "test.azurewebsites.net" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                var configProvider = new TestExtensionConfigProvider();
                var url            = _webHookProvider.GetUrl(configProvider);
                Assert.Equal("https://test.azurewebsites.net/runtime/webhooks/testextension?code=abc123", url.ToString());
            }
        }
예제 #3
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        public void GetAttributes_DynamicSku_ValidatesScheduleExpression()
        {
            var vars = new Dictionary <string, string>
            {
                { "TEST_SCHEDULE_CRON", "0 * * * * *" },
                { "TEST_SCHEDULE_TIMESPAN", "00:00:15" },
                { "WEBSITE_SKU", "Dynamic" },
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                var triggerMetadata = new JObject
                {
                    { "direction", "in" },
                    { "name", "timer" },
                    { "type", "timerTrigger" }
                };
                var bindingContext = new ScriptBindingContext(triggerMetadata);
                var binding        = new CoreExtensionsScriptBindingProvider.TimerTriggerScriptBinding(bindingContext);

                // TimeSpan expression is invalid
                triggerMetadata["schedule"] = "00:00:15";
                var ex = Assert.Throws <ArgumentException>(() => binding.GetAttributes());
                Assert.Equal("'00:00:15' is not a valid CRON expression.", ex.Message);

                // TimeSpan specified via app setting is invalid
                triggerMetadata["schedule"] = "%TEST_SCHEDULE_TIMESPAN%";
                ex = Assert.Throws <ArgumentException>(() => binding.GetAttributes());
                Assert.Equal("'00:00:15' is not a valid CRON expression.", ex.Message);

                // Cron expression is valid
                triggerMetadata["schedule"] = "0 * * * * *";
                var timerAttribute = (TimerTriggerAttribute)binding.GetAttributes().Single();
                Assert.Equal("0 * * * * *", timerAttribute.ScheduleExpression);

                // Cron expression specified via app setting is valid
                triggerMetadata["schedule"] = "%TEST_SCHEDULE_CRON%";
                timerAttribute = (TimerTriggerAttribute)binding.GetAttributes().Single();
                Assert.Equal("0 * * * * *", timerAttribute.ScheduleExpression);
            }
        }
예제 #4
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        public void IsAntaresInternalRequest_ReturnsExpectedResult()
        {
            // not running under Azure
            var request = new HttpRequestMessage(HttpMethod.Get, "http://foobar");

            Assert.False(request.IsAntaresInternalRequest());

            // running under Azure
            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.AzureWebsiteInstanceId, "123" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                // with header
                request = new HttpRequestMessage(HttpMethod.Get, "http://foobar");
                request.Headers.Add(ScriptConstants.AntaresLogIdHeaderName, "123");
                Assert.False(request.IsAntaresInternalRequest());

                request = new HttpRequestMessage(HttpMethod.Get, "http://foobar");
                Assert.True(request.IsAntaresInternalRequest());
            }
        }
예제 #5
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        public async Task Compilation_WithMissingBindingArguments_LogsAF004Warning(IDictionary <string, string> environment)
        {
            using (var testEnvironment = new TestScopedEnvironmentVariable(environment))
            {
                // Create the compilation exception we expect to throw during the reload
                string rootFunctionsFolder = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
                Directory.CreateDirectory(rootFunctionsFolder);

                // Create the invoker dependencies and setup the appropriate method to throw the exception
                RunDependencies dependencies = CreateDependencies();

                // Create a dummy file to represent our function
                string filePath = Path.Combine(rootFunctionsFolder, Guid.NewGuid().ToString() + ".csx");
                File.WriteAllText(filePath, Resources.TestFunctionWithMissingBindingArgumentsCode);

                var metadata = new FunctionMetadata
                {
                    ScriptFile        = filePath,
                    FunctionDirectory = Path.GetDirectoryName(filePath),
                    Name     = Guid.NewGuid().ToString(),
                    Language = DotNetScriptTypes.CSharp
                };

                metadata.Bindings.Add(new BindingMetadata()
                {
                    Name = "myQueueItem", Type = "ManualTrigger"
                });

                var testBinding = new Mock <FunctionBinding>(null, new BindingMetadata()
                {
                    Name = "TestBinding", Type = "blob"
                }, FileAccess.Write);

                var invoker = new DotNetFunctionInvoker(dependencies.Host, metadata, new Collection <FunctionBinding>(),
                                                        new Collection <FunctionBinding> {
                    testBinding.Object
                }, new FunctionEntryPointResolver(), new DotNetCompilationServiceFactory(null),
                                                        dependencies.LoggerFactory, dependencies.MetricsLogger, new Collection <IScriptBindingProvider>());

                try
                {
                    await invoker.GetFunctionTargetAsync();
                }
                catch (CompilationErrorException exc)
                {
                    var builder = new StringBuilder();
                    builder.AppendLine(Resources.TestFunctionWithMissingBindingArgumentsCode);
                    builder.AppendLine();

                    string compilationDetails = exc.Diagnostics.Aggregate(
                        builder,
                        (a, d) => a.AppendLine(d.ToString()),
                        a => a.ToString());

                    throw new Exception(compilationDetails, exc);
                }

                Assert.Contains(dependencies.LoggerProvider.GetAllLogMessages(),
                                t => t.FormattedMessage.Contains($"warning {DotNetConstants.MissingBindingArgumentCompilationCode}") && t.FormattedMessage.Contains("'TestBinding'"));
            }
        }
예제 #6
0
        public async Task StandbyMode_EndToEnd()
        {
            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.AzureWebsitePlaceholderMode, "1" },
                { EnvironmentSettingNames.AzureWebsiteContainerReady, null },
                { EnvironmentSettingNames.AzureWebsiteInstanceId, "87654639876900123453445678890144" },
                { "AzureWebEncryptionKey", "0F75CA46E7EBDD39E4CA6B074D1F9A5972B849A55F91A248" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                var httpConfig = new HttpConfiguration();

                var testRootPath = Path.Combine(Path.GetTempPath(), "StandbyModeTest");
                await FileUtility.DeleteDirectoryAsync(testRootPath, true);

                var loggerProvider        = new TestLoggerProvider();
                var loggerProviderFactory = new TestLoggerProviderFactory(loggerProvider);
                var webHostSettings       = new WebHostSettings
                {
                    IsSelfHost  = true,
                    LogPath     = Path.Combine(testRootPath, "Logs"),
                    SecretsPath = Path.Combine(testRootPath, "Secrets"),
                    ScriptPath  = Path.Combine(testRootPath, "WWWRoot")
                };

                var loggerFactory = new LoggerFactory();
                loggerFactory.AddProvider(loggerProvider);

                var webHostBuilder = Program.CreateWebHostBuilder()
                                     .ConfigureServices(c => {
                    c.AddSingleton(webHostSettings)
                    .AddSingleton <ILoggerProviderFactory>(loggerProviderFactory)
                    .AddSingleton <ILoggerFactory>(loggerFactory);
                });

                var httpServer = new TestServer(webHostBuilder);
                var httpClient = httpServer.CreateClient();
                httpClient.BaseAddress = new Uri("https://localhost/");

                TestHelpers.WaitForWebHost(httpClient);

                var traces = loggerProvider.GetAllLogMessages().ToArray();
                Assert.NotNull(traces.Single(p => p.FormattedMessage.StartsWith("Starting Host (HostId=placeholder-host")));
                Assert.NotNull(traces.Single(p => p.FormattedMessage.StartsWith("Host is in standby mode")));

                // issue warmup request and verify
                var request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup");
                var response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                string responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                // issue warmup request with restart and verify
                request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup?restart=1");
                response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                // Now specialize the host
                ScriptSettingsManager.Instance.SetSetting(EnvironmentSettingNames.AzureWebsitePlaceholderMode, "0");
                ScriptSettingsManager.Instance.SetSetting(EnvironmentSettingNames.AzureWebsiteContainerReady, "1");

                Assert.False(WebScriptHostManager.InStandbyMode);
                Assert.True(ScriptSettingsManager.Instance.ContainerReady);

                // give time for the specialization to happen
                string[] logLines = null;
                await TestHelpers.Await(() =>
                {
                    // wait for the trace indicating that the host has been specialized
                    logLines = loggerProvider.GetAllLogMessages().Where(p => p.FormattedMessage != null).Select(p => p.FormattedMessage).ToArray();
                    return(logLines.Contains("Generating 0 job function(s)"));
                }, userMessageCallback : () => string.Join(Environment.NewLine, loggerProvider.GetAllLogMessages().Select(p => $"[{p.Timestamp.ToString("HH:mm:ss.fff")}] {p.FormattedMessage}")));

                httpServer.Dispose();
                httpClient.Dispose();

                await Task.Delay(2000);

                var hostConfig     = WebHostResolver.CreateScriptHostConfiguration(webHostSettings, true);
                var expectedHostId = hostConfig.HostConfig.HostId;

                // verify the rest of the expected logs
                string text = string.Join(Environment.NewLine, logLines);
                Assert.True(logLines.Count(p => p.Contains("Stopping Host")) >= 1);
                Assert.Equal(1, logLines.Count(p => p.Contains("Creating StandbyMode placeholder function directory")));
                Assert.Equal(1, logLines.Count(p => p.Contains("StandbyMode placeholder function directory created")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Starting Host (HostId=placeholder-host")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Host is in standby mode")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Executed 'Functions.WarmUp' (Succeeded")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Starting host specialization")));
                Assert.Equal(1, logLines.Count(p => p.Contains($"Starting Host (HostId={expectedHostId}")));
                Assert.Contains("Generating 0 job function(s)", logLines);

                WebScriptHostManager.ResetStandbyMode();
            }
        }
예제 #7
0
        public async Task StandbyMode_EndToEnd_LinuxContainer()
        {
            byte[] bytes         = TestHelpers.GenerateKeyBytes();
            var    encryptionKey = Convert.ToBase64String(bytes);

            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.ContainerName, "TestContainer" },
                { EnvironmentSettingNames.ContainerEncryptionKey, encryptionKey },
                { EnvironmentSettingNames.AzureWebsiteContainerReady, null },
                { "AzureWebEncryptionKey", "0F75CA46E7EBDD39E4CA6B074D1F9A5972B849A55F91A248" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                var httpConfig = new HttpConfiguration();

                var testRootPath = Path.Combine(Path.GetTempPath(), "StandbyModeTest_Linux");
                await FileUtility.DeleteDirectoryAsync(testRootPath, true);

                var loggerProvider        = new TestLoggerProvider();
                var loggerProviderFactory = new TestLoggerProviderFactory(loggerProvider);
                var webHostSettings       = new WebHostSettings
                {
                    IsSelfHost  = true,
                    LogPath     = Path.Combine(testRootPath, "Logs"),
                    SecretsPath = Path.Combine(testRootPath, "Secrets"),
                    ScriptPath  = Path.Combine(testRootPath, "WWWRoot")
                };

                var loggerFactory = new LoggerFactory();
                loggerFactory.AddProvider(loggerProvider);

                var webHostBuilder = Program.CreateWebHostBuilder()
                                     .ConfigureServices(c =>
                {
                    c.AddSingleton(webHostSettings)
                    .AddSingleton <ILoggerProviderFactory>(loggerProviderFactory)
                    .AddSingleton <ILoggerFactory>(loggerFactory);
                });

                var httpServer = new TestServer(webHostBuilder);
                var httpClient = httpServer.CreateClient();
                httpClient.BaseAddress = new Uri("https://localhost/");

                TestHelpers.WaitForWebHost(httpClient);

                var traces = loggerProvider.GetAllLogMessages().ToArray();
                Assert.NotNull(traces.Single(p => p.FormattedMessage.StartsWith("Starting Host (HostId=placeholder-host")));
                Assert.NotNull(traces.Single(p => p.FormattedMessage.StartsWith("Host is in standby mode")));

                // issue warmup request and verify
                var request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup");
                var response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                string responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                // issue warmup request with restart and verify
                request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup?restart=1");
                response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                // Now specialize the host by invoking assign
                var    secretManager = httpServer.Host.Services.GetService <ISecretManager>();
                var    masterKey     = (await secretManager.GetHostSecretsAsync()).MasterKey;
                string uri           = "admin/instance/assign";
                request = new HttpRequestMessage(HttpMethod.Post, uri);
                var environment       = new Dictionary <string, string>();
                var assignmentContext = new HostAssignmentContext
                {
                    SiteId      = 1234,
                    SiteName    = "TestSite",
                    Environment = environment
                };
                var    encryptedAssignmentContext = EncryptedHostAssignmentContext.Create(assignmentContext, encryptionKey);
                string json = JsonConvert.SerializeObject(encryptedAssignmentContext);
                request.Content = new StringContent(json, Encoding.UTF8, "application/json");
                request.Headers.Add(AuthenticationLevelHandler.FunctionsKeyHeaderName, masterKey);
                response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.Accepted, response.StatusCode);

                // give time for the specialization to happen
                string[] logLines = null;
                await TestHelpers.Await(() =>
                {
                    // wait for the trace indicating that the host has been specialized
                    logLines = loggerProvider.GetAllLogMessages().Where(p => p.FormattedMessage != null).Select(p => p.FormattedMessage).ToArray();
                    return(logLines.Contains("Generating 0 job function(s)"));
                }, userMessageCallback : () => string.Join(Environment.NewLine, loggerProvider.GetAllLogMessages().Select(p => $"[{p.Timestamp.ToString("HH:mm:ss.fff")}] {p.FormattedMessage}")));

                httpServer.Dispose();
                httpClient.Dispose();

                await Task.Delay(2000);

                var hostConfig     = WebHostResolver.CreateScriptHostConfiguration(webHostSettings, true);
                var expectedHostId = hostConfig.HostConfig.HostId;

                // verify the rest of the expected logs
                string text = string.Join(Environment.NewLine, logLines);
                Assert.True(logLines.Count(p => p.Contains("Stopping Host")) >= 1);
                Assert.Equal(1, logLines.Count(p => p.Contains("Creating StandbyMode placeholder function directory")));
                Assert.Equal(1, logLines.Count(p => p.Contains("StandbyMode placeholder function directory created")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Starting Host (HostId=placeholder-host")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Host is in standby mode")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Executed 'Functions.WarmUp' (Succeeded")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Starting host specialization")));
                Assert.Equal(1, logLines.Count(p => p.Contains($"Starting Host (HostId={expectedHostId}")));
                Assert.Contains("Generating 0 job function(s)", logLines);

                WebScriptHostManager.ResetStandbyMode();
            }
        }
        public async Task StandbyMode_EndToEnd_LinuxContainer()
        {
            byte[] bytes         = TestHelpers.GenerateKeyBytes();
            var    encryptionKey = Convert.ToBase64String(bytes);

            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.ContainerName, "TestApp" },
                { EnvironmentSettingNames.AzureWebsiteName, "TestApp" },
                { EnvironmentSettingNames.ContainerEncryptionKey, encryptionKey },
                { EnvironmentSettingNames.AzureWebsiteContainerReady, null },
                { EnvironmentSettingNames.AzureWebsiteConfigurationReady, null },
                { EnvironmentSettingNames.AzureWebsiteSku, "Dynamic" },
                { EnvironmentSettingNames.AzureWebsiteZipDeployment, null },
                { "AzureWebEncryptionKey", "0F75CA46E7EBDD39E4CA6B074D1F9A5972B849A55F91A248" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                InitializeTestHost("Linux");

                await VerifyWarmupSucceeds();
                await VerifyWarmupSucceeds(restart : true);

                // now specialize the site
                await Assign(encryptionKey);

                // immediately call a function - expect the call to block until
                // the host is fully specialized
                // the Unauthorized is expected since we havne't specified the key
                // it's enough here to ensure we don't get a 404
                var request = new HttpRequestMessage(HttpMethod.Get, $"api/httptrigger");
                request.Headers.Add(ScriptConstants.AntaresColdStartHeaderName, "1");
                var response = await _httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);

                // now that the host is initialized, send a valid key
                // and expect success
                var secretManager = _httpServer.Host.Services.GetService <ISecretManager>();
                var keys          = await secretManager.GetFunctionSecretsAsync("HttpTrigger");

                string key = keys.First().Value;
                request = new HttpRequestMessage(HttpMethod.Get, $"api/httptrigger?code={key}");
                request.Headers.Add(ScriptConstants.AntaresColdStartHeaderName, "1");
                response = await _httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);

                Assert.False(WebScriptHostManager.InStandbyMode);
                Assert.True(ScriptSettingsManager.Instance.ContainerReady);

                // verify warmup function no longer there
                request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup");
                response = await _httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);

                _httpServer.Dispose();
                _httpClient.Dispose();

                // verify the expected logs
                var logLines = _loggerProvider.GetAllLogMessages().Where(p => p.FormattedMessage != null).Select(p => p.FormattedMessage).ToArray();
                Assert.True(logLines.Count(p => p.Contains("Stopping Host")) >= 1);
                Assert.Equal(1, logLines.Count(p => p.Contains("Creating StandbyMode placeholder function directory")));
                Assert.Equal(1, logLines.Count(p => p.Contains("StandbyMode placeholder function directory created")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Starting Host (HostId=placeholder-host")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Host is in standby mode")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Executed 'Functions.WarmUp' (Succeeded")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Validating host assignment context")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Starting Assignment")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Applying 1 app setting(s)")));
                Assert.Equal(1, logLines.Count(p => p.Contains($"Extracting files to '{_webHostSettings.ScriptPath}'")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Zip extraction complete")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Triggering specialization")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Starting host specialization")));
                Assert.Equal(1, logLines.Count(p => p.Contains($"Starting Host (HostId={_expectedHostId}")));
                Assert.Contains("Node.js HttpTrigger function invoked.", logLines);

                // verify cold start log entry
                var     coldStartLog  = _loggerProvider.GetAllLogMessages().FirstOrDefault(p => p.Category == ScriptConstants.LogCategoryHostMetrics);
                JObject coldStartData = JObject.Parse(coldStartLog.FormattedMessage);
                Assert.Equal("Dynamic", coldStartData["sku"]);
                Assert.True((int)coldStartData["dispatchDuration"] > 0);
                Assert.True((int)coldStartData["functionDuration"] > 0);

                WebScriptHostManager.ResetStandbyMode();
            }
        }
예제 #9
0
        public async Task StandbyMode_EndToEnd()
        {
            var vars = new Dictionary <string, string>
            {
                { EnvironmentSettingNames.AzureWebsitePlaceholderMode, "1" },
                { EnvironmentSettingNames.AzureWebsiteInstanceId, "87654639876900123453445678890144" }
            };

            using (var env = new TestScopedEnvironmentVariable(vars))
            {
                var httpConfig = new HttpConfiguration();
                httpConfig.Formatters.Add(new PlaintextMediaTypeFormatter());

                var settingsManager = ScriptSettingsManager.Instance;
                var testRootPath    = Path.Combine(Path.GetTempPath(), "StandbyModeTest");
                if (Directory.Exists(testRootPath))
                {
                    Directory.Delete(testRootPath, true);
                }
                var traceWriter     = new TestTraceWriter(TraceLevel.Info);
                var webHostSettings = new WebHostSettings
                {
                    IsSelfHost  = true,
                    LogPath     = Path.Combine(testRootPath, "Logs"),
                    SecretsPath = Path.Combine(testRootPath, "Secrets"),
                    TraceWriter = traceWriter
                };
                WebApiConfig.Register(httpConfig, _settingsManager, webHostSettings);

                var httpServer = new HttpServer(httpConfig);
                var httpClient = new HttpClient(httpServer);
                httpClient.BaseAddress = new Uri("https://localhost/");

                TestHelpers.WaitForWebHost(httpClient);

                var traces = traceWriter.Traces.ToArray();
                Assert.Equal($"Creating StandbyMode placeholder function directory ({Path.GetTempPath()}Functions\\Standby)", traces[0].Message);
                Assert.Equal("StandbyMode placeholder function directory created", traces[1].Message);

                // issue warmup request and verify
                var request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup");
                var response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                string responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                // issue warmup request with restart and verify
                request  = new HttpRequestMessage(HttpMethod.Get, "api/warmup?restart=1");
                response = await httpClient.SendAsync(request);

                Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                responseBody = await response.Content.ReadAsStringAsync();

                Assert.Equal("WarmUp complete.", responseBody);

                httpServer.Dispose();
                httpClient.Dispose();

                await Task.Delay(2000);

                // verify logs
                string[] logLines = traceWriter.Traces.Select(p => p.Message).ToArray();
                Assert.Equal(2, logLines.Count(p => p.Contains("Host is in standby mode")));
                Assert.Equal(1, logLines.Count(p => p.Contains("Stopping Host")));
                Assert.Equal(2, logLines.Count(p => p.Contains("Executed 'Functions.WarmUp' (Succeeded")));
            }
        }