Enable nullable on VS Translation layer

playground/TestPlatform.Playground/Environment.cs

@@ -7,7 +7,7 @@ namespace TestPlatform.Playground;
 
 internal class EnvironmentVariables
 {
-    public static readonly Dictionary<string, string> Variables = new()
+    public static readonly Dictionary<string, string?> Variables = new()
     {
         ["VSTEST_CONNECTION_TIMEOUT"] = "999",
         ["VSTEST_DEBUG_NOBP"] = "1",

src/Microsoft.TestPlatform.CrossPlatEngine/PostProcessing/ArtifactProcessingManager.cs

@@ -80,7 +80,7 @@ public void CollectArtifacts(TestRunCompleteEventArgs testRunCompleteEventArgs,
             return;
         }
 
-        if (string.IsNullOrEmpty(_testSessionCorrelationId))
+        if (_testSessionCorrelationId.IsNullOrEmpty())
         {
             EqtTrace.Verbose("ArtifactProcessingManager.CollectArtifacts: null testSessionCorrelationId");
             return;
@@ -118,12 +118,13 @@ public async Task PostProcessArtifactsAsync()
         }
 
         // This is not expected, anyway we prefer avoid exception for post processing
-        if (string.IsNullOrEmpty(_testSessionCorrelationId))
+        if (_testSessionCorrelationId.IsNullOrEmpty())
         {
             EqtTrace.Error("ArtifactProcessingManager.PostProcessArtifacts: Unexpected null testSessionCorrelationId");
             return;
         }
 
+        TPDebug.Assert(_processArtifactFolder is not null, "_processArtifactFolder is null");
         if (!_fileHelper.DirectoryExists(_processArtifactFolder))
         {
             EqtTrace.Verbose("ArtifactProcessingManager.PostProcessArtifacts: There are no artifacts to postprocess");
@@ -218,10 +219,10 @@ private TestArtifacts[] LoadTestArtifacts()
     {
         TPDebug.Assert(_processArtifactFolder is not null, "_processArtifactFolder is null");
         return _fileHelper.GetFiles(_processArtifactFolder, "*.*", SearchOption.AllDirectories)
-        .Select(file => new { TestSessionId = Path.GetFileName(Path.GetDirectoryName(file)), Artifact = file })
-        .GroupBy(grp => grp.TestSessionId)
-        .Select(testSessionArtifact => new TestArtifacts(testSessionArtifact.Key, testSessionArtifact.Select(x => ParseArtifact(x.Artifact)).Where(x => x is not null).ToArray()!)) // Bang because null dataflow doesn't yet backport learning from the `Where` clause
-        .ToArray();
+            .Select(file => new { TestSessionId = Path.GetFileName(Path.GetDirectoryName(file)), Artifact = file })
+            .GroupBy(grp => grp.TestSessionId)
+            .Select(testSessionArtifact => new TestArtifacts(testSessionArtifact.Key, testSessionArtifact.Select(x => ParseArtifact(x.Artifact)).Where(x => x is not null).ToArray()!)) // Bang because null dataflow doesn't yet backport learning from the `Where` clause
+            .ToArray();
     }
 
     private static Artifact? ParseArtifact(string fileName)

src/Microsoft.TestPlatform.ObjectModel/TestProcessAttachDebuggerPayload.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.Serialization;
 

src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/ConsoleParameters.cs

@@ -5,13 +5,12 @@
 using System.Diagnostics;
 using System.IO;
 
+using Microsoft.VisualStudio.TestPlatform.CommunicationUtilities;
 using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Extensions;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel;
 using Microsoft.VisualStudio.TestPlatform.Utilities.Helpers;
 using Microsoft.VisualStudio.TestPlatform.Utilities.Helpers.Interfaces;
 
-#nullable disable
-
 namespace Microsoft.TestPlatform.VsTestConsole.TranslationLayer;
 
 /// <summary>
@@ -21,9 +20,10 @@ public class ConsoleParameters
 {
     internal static readonly ConsoleParameters Default = new();
 
-    private string _logFilePath;
     private readonly IFileHelper _fileHelper;
 
+    private string? _logFilePath;
+
     /// <summary>
     /// Create instance of <see cref="ConsoleParameters"/>
     /// </summary>
@@ -43,12 +43,12 @@ public ConsoleParameters(IFileHelper fileHelper)
     /// Environment variables to be set for the process. This will merge the specified entries to the environment variables
     /// inherited from the current process. If you wish to provide a full set of environment variables yourself set <see cref="InheritEnvironmentVariables"/> to false.
     /// </summary>
-    public Dictionary<string, string> EnvironmentVariables { get; set; } = new Dictionary<string, string>();
+    public Dictionary<string, string?> EnvironmentVariables { get; set; } = new();
 
     /// <summary>
     /// When set to true (default), all environment variables are inherited from the current process and the entries provided in <see cref="EnvironmentVariables"/> are merged with that set.
     /// When set to false, only the values you provide in <see cref="EnvironmentVariables"/> are used. Giving you full control of the environment vstest.console is started with.
-    /// This is only rarely useful and can lead to vstest.console not being able to start at all. 
+    /// This is only rarely useful and can lead to vstest.console not being able to start at all.
     /// You most likely want to use <see cref="System.Environment.GetEnvironmentVariables(System.EnvironmentVariableTarget)"/> and combine
     /// <see cref="System.EnvironmentVariableTarget.Machine"/> and <see cref="System.EnvironmentVariableTarget.User"/> responses.
     /// </summary>
@@ -62,7 +62,7 @@ public ConsoleParameters(IFileHelper fileHelper)
     /// <summary>
     /// Full path for the log file
     /// </summary>
-    public string LogFilePath
+    public string? LogFilePath
     {
         get
         {
@@ -71,15 +71,15 @@ public string LogFilePath
 
         set
         {
-            ValidateArg.NotNullOrEmpty(value, "LogFilePath");
+            ValidateArg.NotNullOrEmpty(value!, "LogFilePath");
             var directoryPath = Path.GetDirectoryName(value);
-            if (!string.IsNullOrEmpty(directoryPath) && !_fileHelper.DirectoryExists(directoryPath))
+            if (!directoryPath.IsNullOrEmpty() && !_fileHelper.DirectoryExists(directoryPath))
             {
                 Directory.CreateDirectory(directoryPath);
             }
 
             // Ensure path is double quoted. if path has white space then it can create problem.
-            _logFilePath = value.AddDoubleQuote();
+            _logFilePath = value!.AddDoubleQuote();
         }
     }
 

src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/DiscoveryEventsHandleConverter.cs

@@ -8,8 +8,6 @@
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging;
 
-#nullable disable
-
 namespace Microsoft.TestPlatform.VsTestConsole.TranslationLayer;
 
 /// <summary>
@@ -54,7 +52,7 @@ public void HandleLogMessage(TestMessageLevel level, string message)
     /// </summary>
     /// <param name="discoveryCompleteEventArgs"></param>
     /// <param name="lastChunk"></param>
-    public void HandleDiscoveryComplete(DiscoveryCompleteEventArgs discoveryCompleteEventArgs, IEnumerable<TestCase> lastChunk)
+    public void HandleDiscoveryComplete(DiscoveryCompleteEventArgs discoveryCompleteEventArgs, IEnumerable<TestCase>? lastChunk)
     {
         _testDiscoveryEventsHandler.HandleDiscoveryComplete(discoveryCompleteEventArgs.TotalCount, lastChunk, discoveryCompleteEventArgs.IsAborted);
     }
@@ -63,7 +61,7 @@ public void HandleDiscoveryComplete(DiscoveryCompleteEventArgs discoveryComplete
     /// Handles Discovery Tests
     /// </summary>
     /// <param name="discoveredTestCases"></param>
-    public void HandleDiscoveredTests(IEnumerable<TestCase> discoveredTestCases)
+    public void HandleDiscoveredTests(IEnumerable<TestCase>? discoveredTestCases)
     {
         _testDiscoveryEventsHandler.HandleDiscoveredTests(discoveredTestCases);
     }

src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/Interfaces/IProcessManager.cs

@@ -3,8 +3,6 @@
 
 using System;
 
-#nullable disable
-
 namespace Microsoft.TestPlatform.VsTestConsole.TranslationLayer.Interfaces;
 
 /// <summary>

src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/Interfaces/ITestSession.cs

@@ -8,8 +8,6 @@
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.Interfaces;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.VsTestConsole.TranslationLayer.Interfaces;
 
 /// <summary>
@@ -23,12 +21,12 @@ public interface ITestSession : IDisposable, ITestSessionAsync
     /// Gets the underlying test session info object.
     /// </summary>
     [Obsolete("This API is not final yet and is subject to changes.", false)]
-    TestSessionInfo TestSessionInfo { get; }
+    TestSessionInfo? TestSessionInfo { get; }
 
     /// <summary>
     /// Starts test discovery.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the discovery.</param>
     /// <param name="discoverySettings">The run settings for the discovery.</param>
     /// <param name="discoveryEventsHandler">The discovery event handler.</param>
@@ -41,7 +39,7 @@ void DiscoverTests(
     /// <summary>
     /// Starts test discovery.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the discovery.</param>
     /// <param name="discoverySettings">The run settings for the discovery.</param>
     /// <param name="options">The test platform options.</param>
@@ -62,7 +60,7 @@ void DiscoverTests(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="testRunEventsHandler">The run event handler.</param>
@@ -75,7 +73,7 @@ void RunTests(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="options">The test platform options.</param>
@@ -90,7 +88,7 @@ void RunTests(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="testCases">The list of test cases for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="testRunEventsHandler">The run event handler.</param>
@@ -103,7 +101,7 @@ void RunTests(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="testCases">The list of test cases for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="options">The test platform options.</param>
@@ -118,7 +116,7 @@ void RunTests(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="testRunEventsHandler">The run event handler.</param>
@@ -133,7 +131,7 @@ void RunTestsWithCustomTestHost(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="sources">The list of source assemblies for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="options">The test platform options.</param>
@@ -150,7 +148,7 @@ void RunTestsWithCustomTestHost(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="testCases">The list of test cases for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="testRunEventsHandler">The run event handler.</param>
@@ -165,7 +163,7 @@ void RunTestsWithCustomTestHost(
     /// <summary>
     /// Starts a test run.
     /// </summary>
-    /// 
+    ///
     /// <param name="testCases">The list of test cases for the test run.</param>
     /// <param name="runSettings">The run settings for the run.</param>
     /// <param name="options">The test platform options.</param>
@@ -182,17 +180,17 @@ void RunTestsWithCustomTestHost(
     /// <summary>
     /// Stops the test session.
     /// </summary>
-    /// 
+    ///
     /// <returns>True if the session was successfuly stopped, false otherwise.</returns>
     [Obsolete("This API is not final yet and is subject to changes.", false)]
     bool StopTestSession();
 
     /// <summary>
     /// Stops the test session.
     /// </summary>
-    /// 
+    ///
     /// <param name="eventsHandler">The session event handler.</param>
-    /// 
+    ///
     /// <returns>True if the session was successfuly stopped, false otherwise.</returns>
     [Obsolete("This API is not final yet and is subject to changes.", false)]
     bool StopTestSession(ITestSessionEventsHandler eventsHandler);
@@ -203,7 +201,7 @@ void RunTestsWithCustomTestHost(
     ///
     /// <param name="options">Test Platform options.</param>
     /// <param name="eventsHandler">The session event handler.</param>
-    /// 
+    ///
     /// <returns>True if the session was successfuly stopped, false otherwise.</returns>
     [Obsolete("This API is not final yet and is subject to changes.", false)]
     bool StopTestSession(TestPlatformOptions options, ITestSessionEventsHandler eventsHandler);