Add more logging to dotnet test tracing

Author: Youssef1313

src/Cli/dotnet/commands/dotnet-test/SolutionAndProjectUtility.cs

@@ -4,6 +4,8 @@
 using Microsoft.Build.Evaluation;
 using Microsoft.DotNet.Cli.Utils;
 using Microsoft.DotNet.Tools;
+using Microsoft.DotNet.Tools.Common;
+using Microsoft.DotNet.Tools.Test;
 using NuGet.Packaging;
 using LocalizableStrings = Microsoft.DotNet.Tools.Test.LocalizableStrings;
 
@@ -112,34 +114,51 @@ public static IEnumerable<TestModule> GetProjectProperties(string projectFilePat
             // Check if TargetFramework is specified in global properties
             if (globalProperties.TryGetValue(ProjectProperties.TargetFramework, out string targetFramework))
             {
+                Logger.LogTrace(() => $"Loaded project '{Path.GetFileName(projectFilePath)}' with global property TargetFramework '{targetFramework}'.");
+
                 if (IsValidTargetFramework(project, targetFramework))
                 {
+                    Logger.LogTrace(() => $"Project '{Path.GetFileName(projectFilePath)}' with TargetFramework '{targetFramework}': before re-evaluation '{ProjectProperties.IsTestingPlatformApplication}' is '{project.GetPropertyValue(ProjectProperties.IsTestingPlatformApplication)}'.");
+
                     project.SetProperty(ProjectProperties.TargetFramework, targetFramework);
                     project.ReevaluateIfNecessary();
-                    if (GetModuleFromProject(project) is {} module)
+                    Logger.LogTrace(() => $"Project '{Path.GetFileName(projectFilePath)}' with TargetFramework '{targetFramework}': after re-evaluation '{ProjectProperties.IsTestingPlatformApplication}' is '{project.GetPropertyValue(ProjectProperties.IsTestingPlatformApplication)}'.");
+
+                    if (GetModuleFromProject(project) is { } module)
                     {
                         projects.Add(module);
                     }
                 }
+                else
+                {
+                    // TODO: When can this happen? Should we explicitly error?
+                    Logger.LogTrace(() => $"Project '{Path.GetFileName(projectFilePath)}' with TargetFramework '{targetFramework}' was considered invalid.");
+                }
             }
             else
             {
                 string targetFrameworks = project.GetPropertyValue(ProjectProperties.TargetFrameworks);
 
                 if (string.IsNullOrEmpty(targetFrameworks))
                 {
+                    Logger.LogTrace(() => $"Loaded project '{Path.GetFileName(projectFilePath)}' has '{ProjectProperties.IsTestingPlatformApplication}' = '{project.GetPropertyValue(ProjectProperties.IsTestingPlatformApplication)}'.");
+
                     if (GetModuleFromProject(project) is {} module)
                     {
                         projects.Add(module);
                     }
                 }
                 else
                 {
+                    Logger.LogTrace(() => $"Loaded project '{Path.GetFileName(projectFilePath)}' has '{ProjectProperties.IsTestingPlatformApplication}' = '{project.GetPropertyValue(ProjectProperties.IsTestingPlatformApplication)}' (TFMs: '{targetFrameworks}').");
+
                     var frameworks = targetFrameworks.Split(CliConstants.SemiColon, StringSplitOptions.RemoveEmptyEntries);
                     foreach (var framework in frameworks)
                     {
                         project.SetProperty(ProjectProperties.TargetFramework, framework);
                         project.ReevaluateIfNecessary();
+                        Logger.LogTrace(() => $"Loaded project '{Path.GetFileName(projectFilePath)}' has '{ProjectProperties.IsTestingPlatformApplication}' = '{project.GetPropertyValue(ProjectProperties.IsTestingPlatformApplication)}' (TFM: '{framework}').");
+
                         if (GetModuleFromProject(project) is {} module)
                         {
                             projects.Add(module);