improving StandbyMode test

Author: brettsam

test/WebJobs.Script.Tests.Integration/Host/StandbyManagerTests.cs

@@ -114,21 +114,19 @@ public async Task StandbyMode_EndToEnd()
                 ScriptSettingsManager.Instance.SetSetting(EnvironmentSettingNames.AzureWebsitePlaceholderMode, "0");
 
                 // give time for the specialization to happen
-                await Task.Delay(2000);
-
-                httpServer.Dispose();
-                httpClient.Dispose();
-
-                var hostConfig = WebHostResolver.CreateScriptHostConfiguration(webHostSettings, true);
-                var expectedHostId = hostConfig.HostConfig.HostId;
-
                 string[] logLines = null;
                 await TestHelpers.Await(() =>
                 {
                     // wait for the trace indicating that the host has been specialized
                     logLines = traceWriter.GetTraces().Select(p => p.Message).ToArray();
                     return logLines.Contains("Generating 0 job function(s)");
-                }, userMessageCallback: () => string.Join(Environment.NewLine, traceWriter.GetTraces().Select(p => p.Message)));
+                }, userMessageCallback: () => string.Join(Environment.NewLine, traceWriter.GetTraces().Select(p => $"[{p.Timestamp.ToString("HH:mm:ss.fff")}] {p.Message}")));
+
+                httpServer.Dispose();
+                httpClient.Dispose();
+
+                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);