Enable nullables on Abstraction project

TestPlatform.sln

@@ -1043,6 +1043,7 @@ Global
 		src\Microsoft.TestPlatform.Nullability\Microsoft.TestPlatform.Nullability.projitems*{76d4bb7e-d981-42d5-be96-6fad8def9a4a}*SharedItemsImports = 5
 		src\Microsoft.TestPlatform.Execution.Shared\Microsoft.TestPlatform.Execution.Shared.projitems*{7f26eda3-c8c4-4b7f-a9b6-d278c2f40a13}*SharedItemsImports = 13
 		src\Microsoft.TestPlatform.Nullability\Microsoft.TestPlatform.Nullability.projitems*{9df3bc3c-2a53-46e7-9291-40728ace5f82}*SharedItemsImports = 13
+		src\Microsoft.TestPlatform.Nullability\Microsoft.TestPlatform.Nullability.projitems*{cae652af-6801-425e-aaf3-ab20de7df88e}*SharedItemsImports = 5
 		src\Microsoft.TestPlatform.Nullability\Microsoft.TestPlatform.Nullability.projitems*{fbf74c8f-695c-4967-84ac-358eefb1376d}*SharedItemsImports = 5
 	EndGlobalSection
 EndGlobal

src/Microsoft.TestPlatform.CommunicationUtilities/Messages/MessageType.cs

@@ -1,8 +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;
-
 using Microsoft.VisualStudio.TestPlatform.ObjectModel;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;
 

src/Microsoft.TestPlatform.CrossPlatEngine/Adapter/FrameworkHandle.cs

@@ -12,7 +12,6 @@
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.Interfaces;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Engine;
 using Microsoft.VisualStudio.TestPlatform.ObjectModel.Engine.ClientProtocol;
-using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
 using CrossPlatEngineResources = Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Resources.Resources;
 
@@ -75,7 +74,7 @@ public FrameworkHandle(ITestCaseEventsHandler testCaseEventsHandler, ITestRunCac
     public int LaunchProcessWithDebuggerAttached(string filePath, string workingDirectory, string arguments, IDictionary<string, string> environmentVariables)
     {
         // If an adapter attempts to launch a process after the run is complete (=> this object is disposed)
-        // throw an error. 
+        // throw an error.
         if (_isDisposed)
         {
             throw new ObjectDisposedException("IFrameworkHandle");

src/Microsoft.TestPlatform.CrossPlatEngine/TestEngine.cs

@@ -7,7 +7,6 @@
 using System.Linq;
 using System.Text;
 
-using Microsoft.VisualStudio.TestPlatform.Common;
 using Microsoft.VisualStudio.TestPlatform.Common.Hosting;
 using Microsoft.VisualStudio.TestPlatform.Common.Logging;
 using Microsoft.VisualStudio.TestPlatform.Common.Telemetry;

src/Microsoft.TestPlatform.Extensions.BlameDataCollector/ProcDumpDumper.cs

@@ -48,7 +48,7 @@ public ProcDumpDumper(IProcessHelper processHelper, IFileHelper fileHelper, IEnv
         _environment = environment;
     }
 
-    protected Action<object, string> OutputReceivedCallback => (process, data) =>
+    protected Action<object?, string> OutputReceivedCallback => (process, data) =>
         // useful for visibility when debugging this tool
         // Console.ForegroundColor = ConsoleColor.Cyan;
         // Console.WriteLine(data);

src/Microsoft.TestPlatform.Extensions.BlameDataCollector/PublicAPI/PublicAPI.Shipped.txt

@@ -72,7 +72,7 @@ Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.AttachToTarg
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.DetachFromTargetProcess(int targetProcessId) -> void
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.Dump(int processId, string! outputDirectory, Microsoft.TestPlatform.Extensions.BlameDataCollector.DumpTypeOption dumpType) -> void
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.GetDumpFiles(bool processCrashed) -> System.Collections.Generic.IEnumerable<string!>!
-Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.OutputReceivedCallback.get -> System.Action<object!, string!>!
+Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.OutputReceivedCallback.get -> System.Action<object?, string!>!
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.ProcDumpDumper() -> void
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.ProcDumpDumper(Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces.IProcessHelper! processHelper, Microsoft.VisualStudio.TestPlatform.Utilities.Helpers.Interfaces.IFileHelper! fileHelper, Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces.IEnvironment! environment, Microsoft.TestPlatform.Extensions.BlameDataCollector.INativeMethodsHelper? nativeMethodsHelper) -> void
 Microsoft.TestPlatform.Extensions.BlameDataCollector.ProcDumpDumper.WaitForDumpToFinish() -> void

src/Microsoft.TestPlatform.Extensions.BlameDataCollector/WindowsHangDumper.cs

@@ -27,7 +27,7 @@ public WindowsHangDumper(IProcessHelper processHelper, Action<string>? logWarnin
         _processHelper = processHelper;
     }
 
-    private static Action<object, string> OutputReceivedCallback => (process, data) =>
+    private static Action<object?, string> OutputReceivedCallback => (process, data) =>
         // useful for visibility when debugging this tool
         // Console.ForegroundColor = ConsoleColor.Cyan;
         // Console.WriteLine(data);

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/IO/IStream.cs

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

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/Runtime/IAssemblyLoadContext.cs

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

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/Runtime/IAssemblyResolver.cs

@@ -4,8 +4,6 @@
 using System;
 using System.Reflection;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 
 /// <summary>
@@ -16,7 +14,7 @@ namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 /// <returns>The assembly that resolves the type, assembly, or resource; or null if the assembly
 /// cannot be resolved.
 /// </returns>
-public delegate Assembly AssemblyResolveEventHandler(object sender, AssemblyResolveEventArgs args);
+public delegate Assembly AssemblyResolveEventHandler(object? sender, AssemblyResolveEventArgs? args);
 
 /// <summary>
 /// The AssemblyResolver interface.
@@ -26,7 +24,7 @@ public interface IAssemblyResolver : IDisposable
     /// <summary>
     /// Occurs when the resolution of an assembly fails
     /// </summary>
-    event AssemblyResolveEventHandler AssemblyResolve;
+    event AssemblyResolveEventHandler? AssemblyResolve;
 }
 
 /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/IEnvironment.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 
 /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/IProcessHelper.cs

@@ -4,8 +4,6 @@
 using System;
 using System.Collections.Generic;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 
 /// <summary>
@@ -24,7 +22,7 @@ public interface IProcessHelper
     /// <param name="exitCallBack">Call back for on process exit</param>
     /// <param name="outputCallback">Call back for on process output</param>
     /// <returns>The process created.</returns>
-    object LaunchProcess(string processPath, string arguments, string workingDirectory, IDictionary<string, string> environmentVariables, Action<object, string> errorCallback, Action<object> exitCallBack, Action<object, string> outputCallback);
+    object LaunchProcess(string processPath, string arguments, string workingDirectory, IDictionary<string, string>? envVariables, Action<object?, string>? errorCallback, Action<object>? exitCallBack, Action<object?, string>? outputCallBack);
 
     /// <summary>
     /// Gets the current process file path.
@@ -73,7 +71,7 @@ public interface IProcessHelper
     /// </summary>
     /// <param name="process">process parameter</param>
     /// <returns>process id.</returns>
-    int GetProcessId(object process);
+    int GetProcessId(object? process);
 
     /// <summary>
     /// Gets the process name for given process id.
@@ -88,7 +86,7 @@ public interface IProcessHelper
     /// <param name="process">process parameter</param>
     /// <param name="exitCode">return value of exitCode</param>
     /// <returns>False if process has not exited, True otherwise</returns>
-    bool TryGetExitCode(object process, out int exitCode);
+    bool TryGetExitCode(object? process, out int exitCode);
 
     /// <summary>
     /// Sets the process exit callback.
@@ -99,19 +97,19 @@ public interface IProcessHelper
     /// <param name="callbackAction">
     /// Callback on process exit.
     /// </param>
-    void SetExitCallback(int processId, Action<object> callbackAction);
+    void SetExitCallback(int processId, Action<object?>? callbackAction);
 
     /// <summary>
     /// Terminates a process.
     /// </summary>
     /// <param name="process">Reference of process to terminate.</param>
-    void TerminateProcess(object process);
+    void TerminateProcess(object? process);
 
     /// <summary>
     /// Wait for process to exit
     /// </summary>
     /// <param name="process">Reference to process</param>
-    void WaitForProcessExit(object process);
+    void WaitForProcessExit(object? process);
 
     /// <summary>
     /// Gets the process handle for given process Id.

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/IThread.cs

@@ -3,8 +3,6 @@
 
 using System;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 
 public interface IThread
@@ -16,5 +14,5 @@ public interface IThread
     /// <param name="apartmentState">The apartment state.</param>
     /// <param name="waitForCompletion"> True for running in Sync, False for running in Async</param>
     /// <exception cref="ThreadApartmentStateNotSupportedException"> When thread apartment state not supported for platform. </exception>>
-    void Run(Action action, PlatformApartmentState apartmentState, bool waitForCompletion);
+    void Run(Action? action, PlatformApartmentState apartmentState, bool waitForCompletion);
 }

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/PlatformApartmentState.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
 /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/PlatformArchitecture.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
 /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/PlatformOperatingSystem.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
 /// <summary>

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/System/ThreadApartmentStateNotSupportedException.cs

@@ -3,8 +3,6 @@
 
 using System;
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions;
 
 /// <summary>
@@ -26,7 +24,7 @@ public ThreadApartmentStateNotSupportedException()
     /// Initializes with the message.
     /// </summary>
     /// <param name="message">Message for the exception.</param>
-    public ThreadApartmentStateNotSupportedException(string message)
+    public ThreadApartmentStateNotSupportedException(string? message)
         : base(message)
     {
     }
@@ -37,7 +35,7 @@ public ThreadApartmentStateNotSupportedException(string message)
     /// </summary>
     /// <param name="message">Message for the exception.</param>
     /// <param name="innerException">The inner exception.</param>
-    public ThreadApartmentStateNotSupportedException(string message, Exception innerException)
+    public ThreadApartmentStateNotSupportedException(string? message, Exception? innerException)
         : base(message, innerException)
     {
     }

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/Tracing/IPlatformEqtTrace.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.ObjectModel;
 
 /// <summary>
@@ -59,7 +57,7 @@ bool DoNotInitialize
     /// Gets file path for trace log file.
     /// </summary>
     /// <returns>True if tracing is enabled.</returns>
-    string GetLogFile();
+    string? GetLogFile();
 
     /// <summary>
     /// Sets platform specific trace value for tracing verbosity.

src/Microsoft.TestPlatform.PlatformAbstractions/Interfaces/Tracing/PlatformTraceLevel.cs

@@ -1,8 +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.
 
-#nullable disable
-
 namespace Microsoft.VisualStudio.TestPlatform.ObjectModel;
 
 public enum PlatformTraceLevel

src/Microsoft.TestPlatform.PlatformAbstractions/Microsoft.TestPlatform.PlatformAbstractions.csproj

@@ -3,6 +3,7 @@
   <PropertyGroup>
     <TestPlatformRoot Condition="$(TestPlatformRoot) == ''">..\..\</TestPlatformRoot>
   </PropertyGroup>
+  <Import Project="..\Microsoft.TestPlatform.Nullability\Microsoft.TestPlatform.Nullability.projitems" Label="Shared" />
   <Import Project="$(TestPlatformRoot)scripts/build/TestPlatform.Settings.targets" />
   <PropertyGroup>
     <AssemblyName>Microsoft.TestPlatform.PlatformAbstractions</AssemblyName>