Skip VSTS attribute (#1115)

.vsts-pipelines/templates/build-steps.yml

@@ -3,6 +3,8 @@ phases:
   parameters:
     agentOs: Windows
     beforeBuild:
+      - powershell: "git submodule update --init"
+        displayName: Update submodules
       - powershell: "& ./tools/update_schema.ps1"
         displayName: Update ANCM schema
       - powershell: Restart-Service w3svc

test/Common.FunctionalTests/SkipVSTSAttribute.cs

@@ -0,0 +1,17 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.AspNetCore.Server.IntegrationTesting;
+using Microsoft.AspNetCore.Testing.xunit;
+
+namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
+{
+    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Method)]
+    public sealed class SkipInVSTSAttribute : Attribute, ITestCondition
+    {
+        public bool IsMet => string.IsNullOrEmpty(Environment.GetEnvironmentVariable("SYSTEM_TASKDEFINITIONSURI"));
+
+        public string SkipReason => "Running in VSTS";
+    }
+}

test/IISExpress.FunctionalTests/OutOfProcess/HttpsTest.cs

@@ -18,6 +18,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
     // So these tests always have to use ports in this range, and we can't rely on OS-allocated ports without a whole lot of ceremony around
     // creating self-signed certificates and registering SSL bindings with HTTP.sys
     // Test specific to IISExpress
+    [SkipInVSTS]
     public class HttpsTest : IISFunctionalTestBase
     {
         public HttpsTest(ITestOutputHelper output) : base(output)