microsoft · Evangelink · Jun 13, 2022 · Jun 13, 2022
diff --git a/src/SettingsMigrator/Migrator.cs b/src/SettingsMigrator/Migrator.cs
@@ -6,9 +6,9 @@
 using System.IO;
 using System.Xml;
 
-using CommandLineResources = Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Resources.Resources;
+using SettingsMigrator;
 
-#nullable disable
+using CommandLineResources = Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Resources.Resources;
 
 namespace Microsoft.VisualStudio.TestPlatform.SettingsMigrator;
 
@@ -91,7 +91,7 @@ public void Migrate(string oldFilePath, string newFilePath)
     /// <param name="newRunSettingsPath">Path to new runsettings.</param>
     private void MigrateRunSettings(string oldRunSettingsPath, string newRunSettingsPath)
     {
-        string testSettingsPath = null;
+        string? testSettingsPath = null;
         using XmlTextReader reader = new(oldRunSettingsPath);
         reader.Namespaces = false;
 
@@ -106,7 +106,7 @@ private void MigrateRunSettings(string oldRunSettingsPath, string newRunSettings
             testSettingsPath = testSettingsNode.InnerText;
         }
 
-        if (!string.IsNullOrWhiteSpace(testSettingsPath))
+        if (!testSettingsPath.IsNullOrWhiteSpace())
         {
             // Expand path relative to runSettings location.
             if (!Path.IsPathRooted(testSettingsPath))
@@ -153,25 +153,25 @@ private void MigrateTestSettingsNodesToRunSettings(string testSettingsPath, XmlD
     {
         var testSettingsNodes = ReadTestSettingsNodes(testSettingsPath);
 
-        string testTimeout = null;
+        string? testTimeout = null;
         if (testSettingsNodes.Timeout != null && testSettingsNodes.Timeout.Attributes[TestTimeoutAttributeName] != null)
         {
             testTimeout = testSettingsNodes.Timeout.Attributes[TestTimeoutAttributeName].Value;
         }
 
-        string runTimeout = null;
+        string? runTimeout = null;
         if (testSettingsNodes.Timeout != null && testSettingsNodes.Timeout.Attributes[RunTimeoutAttributeName] != null)
         {
             runTimeout = testSettingsNodes.Timeout.Attributes[RunTimeoutAttributeName].Value;
         }
 
-        string parallelTestCount = null;
+        string? parallelTestCount = null;
         if (testSettingsNodes.Execution != null && testSettingsNodes.Execution.Attributes[ParallelTestCountAttributeName] != null)
         {
             parallelTestCount = testSettingsNodes.Execution.Attributes[ParallelTestCountAttributeName].Value;
         }
 
-        string hostProcessPlatform = null;
+        string? hostProcessPlatform = null;
         if (testSettingsNodes.Execution != null && testSettingsNodes.Execution.Attributes[HostProcessPlatformAttributeName] != null)
         {
             hostProcessPlatform = testSettingsNodes.Execution.Attributes[HostProcessPlatformAttributeName].Value;
@@ -187,7 +187,7 @@ private void MigrateTestSettingsNodesToRunSettings(string testSettingsPath, XmlD
         AddLegacyNodes(testSettingsNodes, testTimeout, parallelTestCount, hostProcessPlatform, runSettingsXmlDoc);
 
         // TestSessionTimeout node.
-        if (!string.IsNullOrEmpty(runTimeout))
+        if (!runTimeout.IsNullOrEmpty())
         {
             AddRunTimeoutNode(runTimeout, runSettingsXmlDoc);
         }
@@ -252,10 +252,15 @@ private void RemoveEmbeddedTestSettings(XmlDocument newXmlDoc)
     /// <param name="parallelTestCount">parallelTestCount</param>
     /// <param name="hostProcessPlatform">hostProcessPlatform</param>
     /// <param name="newXmlDoc">newXmlDoc</param>
-    private void AddLegacyNodes(TestSettingsNodes testSettingsNodes, string testTimeout, string parallelTestCount, string hostProcessPlatform, XmlDocument newXmlDoc)
+    private void AddLegacyNodes(TestSettingsNodes testSettingsNodes, string? testTimeout, string? parallelTestCount, string? hostProcessPlatform, XmlDocument newXmlDoc)
     {
-        if (testSettingsNodes.Deployment == null && testSettingsNodes.Script == null && testSettingsNodes.UnitTestConfig == null &&
-            string.IsNullOrEmpty(parallelTestCount) && string.IsNullOrEmpty(testTimeout) && string.IsNullOrEmpty(hostProcessPlatform) && testSettingsNodes.Hosts == null)
+        if (testSettingsNodes.Deployment == null
+            && testSettingsNodes.Script == null
+            && testSettingsNodes.UnitTestConfig == null
+            && parallelTestCount.IsNullOrEmpty()
+            && testTimeout.IsNullOrEmpty()
+            && hostProcessPlatform.IsNullOrEmpty()
+            && testSettingsNodes.Hosts == null)
         {
             return;
         }
@@ -301,25 +306,25 @@ private void AddLegacyNodes(TestSettingsNodes testSettingsNodes, string testTime
         }
 
         // Execution node.
-        if (testSettingsNodes.UnitTestConfig != null || !string.IsNullOrEmpty(parallelTestCount) || !string.IsNullOrEmpty(testTimeout) || testSettingsNodes.Hosts != null)
+        if (testSettingsNodes.UnitTestConfig != null || !parallelTestCount.IsNullOrEmpty() || !testTimeout.IsNullOrEmpty() || testSettingsNodes.Hosts != null)
         {
             var newExecutionNode = newXmlDoc.CreateNode(XmlNodeType.Element, ExecutionNodeName, null);
 
-            if (!string.IsNullOrEmpty(parallelTestCount))
+            if (!parallelTestCount.IsNullOrEmpty())
             {
                 var paralellAttribute = newXmlDoc.CreateAttribute(ParallelTestCountAttributeName);
                 paralellAttribute.Value = parallelTestCount;
                 newExecutionNode.Attributes.Append(paralellAttribute);
             }
 
-            if (!string.IsNullOrEmpty(hostProcessPlatform))
+            if (!hostProcessPlatform.IsNullOrEmpty())
             {
                 var hostProcessPlatformAttribute = newXmlDoc.CreateAttribute(HostProcessPlatformAttributeName);
                 hostProcessPlatformAttribute.Value = hostProcessPlatform;
                 newExecutionNode.Attributes.Append(hostProcessPlatformAttribute);
             }
 
-            if (!string.IsNullOrEmpty(testTimeout))
+            if (!testTimeout.IsNullOrEmpty())
             {
                 var newTimeoutsNode = newXmlDoc.CreateNode(XmlNodeType.Element, TimeoutsNodeName, null);
                 var testtimeoutattribute = newXmlDoc.CreateAttribute(TestTimeoutAttributeName);

diff --git a/src/SettingsMigrator/NullableHelpers.cs b/src/SettingsMigrator/NullableHelpers.cs
@@ -0,0 +1,42 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+// <auto-generated>
+// This code is auto-generated. Changes to this file will be lost!
+// This T4 file is copied in various projects because inclusion as link or through shared project
+// doesn't allow to generate the C# file locally. If some modification is required, please update
+// all instances.
+// </auto-generated>
+
+#nullable enable
+
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+
+namespace SettingsMigrator;
+
+internal static class StringUtils
+{
+    /// <inheritdoc cref="string.IsNullOrEmpty(string)"/>
+    [SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+    public static bool IsNullOrEmpty([NotNullWhen(returnValue: false)] this string? value)
+        => string.IsNullOrEmpty(value);
+
+    /// <inheritdoc cref="string.IsNullOrWhiteSpace(string)"/>
+    [SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+    public static bool IsNullOrWhiteSpace([NotNullWhen(returnValue: false)] this string? value)
+        => string.IsNullOrWhiteSpace(value);
+}
+
+[SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+internal static class TPDebug
+{
+    /// <inheritdoc cref="Debug.Assert(bool)"/>
+    [Conditional("DEBUG")]
+    public static void Assert([DoesNotReturnIf(false)] bool b)
+        => Debug.Assert(b);
+
+    /// <inheritdoc cref="Debug.Assert(bool, string)"/>
+    [Conditional("DEBUG")]
+    public static void Assert([DoesNotReturnIf(false)] bool b, string message)
+        => Debug.Assert(b, message);
+}
diff --git a/src/SettingsMigrator/NullableHelpers.tt b/src/SettingsMigrator/NullableHelpers.tt
@@ -0,0 +1,45 @@
+<#@ template debug="true" hostspecific="true" language="C#" #>
+<#@ output extension=".cs" #>
+<#@ assembly name="System.Core" #>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+// <auto-generated>
+// This code is auto-generated. Changes to this file will be lost!
+// This T4 file is copied in various projects because inclusion as link or through shared project
+// doesn't allow to generate the C# file locally. If some modification is required, please update
+// all instances.
+// </auto-generated>
+
+#nullable enable
+
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+
+namespace <#= System.Runtime.Remoting.Messaging.CallContext.LogicalGetData("NamespaceHint") #>;
+
+internal static class StringUtils
+{
+    /// <inheritdoc cref="string.IsNullOrEmpty(string)"/>
+    [SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+    public static bool IsNullOrEmpty([NotNullWhen(returnValue: false)] this string? value)
+        => string.IsNullOrEmpty(value);
+
+    /// <inheritdoc cref="string.IsNullOrWhiteSpace(string)"/>
+    [SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+    public static bool IsNullOrWhiteSpace([NotNullWhen(returnValue: false)] this string? value)
+        => string.IsNullOrWhiteSpace(value);
+}
+
+[SuppressMessage("ApiDesign", "RS0030:Do not used banned APIs", Justification = "Replacement API to allow nullable hints for compiler")]
+internal static class TPDebug
+{
+    /// <inheritdoc cref="Debug.Assert(bool)"/>
+    [Conditional("DEBUG")]
+    public static void Assert([DoesNotReturnIf(false)] bool b)
+        => Debug.Assert(b);
+
+    /// <inheritdoc cref="Debug.Assert(bool, string)"/>
+    [Conditional("DEBUG")]
+    public static void Assert([DoesNotReturnIf(false)] bool b, string message)
+        => Debug.Assert(b, message);
+}
diff --git a/src/SettingsMigrator/PathResolver.cs b/src/SettingsMigrator/PathResolver.cs
@@ -4,8 +4,6 @@
 using System;
 using System.IO;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.SettingsMigrator;
 
 /// <summary>
@@ -20,9 +18,9 @@ public class PathResolver
     /// </summary>
     /// <param name="args">User inputs</param>
     /// <returns>New file path to create</returns>
-    public string GetTargetPath(string[] args)
+    public string? GetTargetPath(string[] args)
     {
-        string newFilePath = null;
+        string? newFilePath = null;
         if (args.Length < 1 || !Path.IsPathRooted(args[0]))
         {
             return newFilePath;

diff --git a/src/SettingsMigrator/Program.cs b/src/SettingsMigrator/Program.cs
@@ -4,9 +4,9 @@
 using System;
 using System.Globalization;
 
-using CommandLineResources = Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Resources.Resources;
+using SettingsMigrator;
 
-#nullable disable
+using CommandLineResources = Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Resources.Resources;
 
 namespace Microsoft.VisualStudio.TestPlatform.SettingsMigrator;
 
@@ -23,9 +23,9 @@ public static class Program
     public static int Main(string[] args)
     {
         var pathResolver = new PathResolver();
-        string newFilePath = pathResolver.GetTargetPath(args);
+        string? newFilePath = pathResolver.GetTargetPath(args);
 
-        if (!string.IsNullOrEmpty(newFilePath))
+        if (!newFilePath.IsNullOrEmpty())
         {
             string oldFilePath = args[0];
             var migrator = new Migrator();

@@ -1,26 +1,27 @@
+#nullable enable
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Migrator
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Migrator.Migrate(string oldFilePath, string newFilePath) -> void
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Migrator.Migrate(string! oldFilePath, string! newFilePath) -> void
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Migrator.Migrator() -> void
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.PathResolver
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.PathResolver.GetTargetPath(string[] args) -> string
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.PathResolver.GetTargetPath(string![]! args) -> string?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.PathResolver.PathResolver() -> void
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Program
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Datacollectors.get -> System.Xml.XmlNodeList
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Datacollectors.get -> System.Xml.XmlNodeList?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Datacollectors.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Deployment.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Deployment.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Deployment.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Execution.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Execution.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Execution.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Hosts.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Hosts.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Hosts.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Script.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Script.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Script.set -> void
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.TestSettingsNodes() -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Timeout.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Timeout.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.Timeout.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.UnitTestConfig.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.UnitTestConfig.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.UnitTestConfig.set -> void
-Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.WebSettings.get -> System.Xml.XmlNode
+Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.WebSettings.get -> System.Xml.XmlNode?
 Microsoft.VisualStudio.TestPlatform.SettingsMigrator.TestSettingsNodes.WebSettings.set -> void
-static Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Program.Main(string[] args) -> int
+static Microsoft.VisualStudio.TestPlatform.SettingsMigrator.Program.Main(string![]! args) -> int
diff --git a/src/SettingsMigrator/SettingsMigrator.csproj b/src/SettingsMigrator/SettingsMigrator.csproj
@@ -27,6 +27,11 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Update="NullableHelpers.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>NullableHelpers.tt</DependentUpon>
+    </Compile>
     <Compile Update="Resources\Resources.Designer.cs">
       <DesignTime>True</DesignTime>
       <AutoGen>True</AutoGen>
@@ -44,5 +49,17 @@
     <AdditionalFiles Include="PublicAPI/PublicAPI.Shipped.txt" />
     <AdditionalFiles Include="PublicAPI/PublicAPI.Unshipped.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\..\shared\NullableAttributes.cs" Link="NullableAttributes.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Update="NullableHelpers.tt">
+      <LastGenOutput>NullableHelpers.cs</LastGenOutput>
+      <Generator>TextTemplatingFileGenerator</Generator>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
+  </ItemGroup>
   <Import Project="$(TestPlatformRoot)scripts\build\TestPlatform.targets" />
 </Project>
diff --git a/src/SettingsMigrator/TestSettingsNodes.cs b/src/SettingsMigrator/TestSettingsNodes.cs
@@ -3,28 +3,26 @@
 
 using System.Xml;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.SettingsMigrator;
 
 /// <summary>
 /// Contains the test settings nodes that need to be converted.
 /// </summary>
 public class TestSettingsNodes
 {
-    public XmlNode Deployment { get; set; }
+    public XmlNode? Deployment { get; set; }
 
-    public XmlNode Script { get; set; }
+    public XmlNode? Script { get; set; }
 
-    public XmlNode WebSettings { get; set; }
+    public XmlNode? WebSettings { get; set; }
 
-    public XmlNodeList Datacollectors { get; set; }
+    public XmlNodeList? Datacollectors { get; set; }
 
-    public XmlNode Timeout { get; set; }
+    public XmlNode? Timeout { get; set; }
 
-    public XmlNode UnitTestConfig { get; set; }
+    public XmlNode? UnitTestConfig { get; set; }
 
-    public XmlNode Hosts { get; set; }
+    public XmlNode? Hosts { get; set; }
 
-    public XmlNode Execution { get; set; }
+    public XmlNode? Execution { get; set; }
 }