chore: Update target frameworks for Maui and Testing projects (#4174)

… when running on Windows<!-- Please be sure to read the
[Contribute](https://github.com/reactiveui/reactiveui#contribute)
section of the README -->

**What kind of change does this PR introduce?**
<!-- Bug fix, feature, docs update, ... -->

fix for #4170

**What is the current behavior?**
<!-- You can also link to an open issue here. -->

#4170

**What is the new behavior?**
<!-- If this is a feature change -->

Refactored target framework definitions in Directory.Build.props to
improve cross-platform support for Maui and test projects. Updated
ReactiveUI.Testing.csproj to use the correct target frameworks property.
These changes ensure more accurate and flexible multi-platform builds.

**What might this PR break?**

Resolves a previous issue

**Please check if the PR fulfills these requirements**
- [x] Tests for the changes have been added (for bug fixes / features)
- [ ] Docs have been added / updated (for bug fixes / features)

**Other information**:

---------

Co-authored-by: Tomasz Cielecki <249719+Cheesebaron@users.noreply.github.com>
Co-authored-by: Glenn <5834289+glennawatson@users.noreply.github.com>

Author: 3 people

src/Directory.Build.props

@@ -38,7 +38,7 @@
     <!-- Enable building Windows-specific targets on non-Windows platforms -->
     <EnableWindowsTargeting>true</EnableWindowsTargeting>
   </PropertyGroup>
-  
+
   <PropertyGroup>
     <!-- Granular Target Framework definitions for cross-platform builds -->
     <ReactiveUICoreTargets>net8.0;net9.0;net10.0</ReactiveUICoreTargets>
@@ -58,15 +58,19 @@
     <ReactiveUITestTargets>net9.0;net10.0</ReactiveUITestTargets>
     <ReactiveUITestTargets Condition="$([MSBuild]::IsOsPlatform('Windows'))">net9.0-windows10.0.19041.0;net10.0-windows10.0.19041.0</ReactiveUITestTargets>
 
-    <ReactiveUIMauiTestTargets>net9.0;net10.0</ReactiveUIMauiTestTargets>
-    <ReactiveUIMauiTestTargets Condition="$([MSBuild]::IsOsPlatform('Windows'))">net9.0-windows10.0.19041.0;net10.0-windows10.0.19041.0</ReactiveUIMauiTestTargets>
-
-    <ReactiveMauiTargets>net9.0;net10.0;$(ReactiveUIAndroidTargets)</ReactiveMauiTargets>
+    <ReactiveUIMauiTestTargets Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIMauiWindowsTargets)</ReactiveUIMauiTestTargets>
+    <ReactiveUIMauiTestTargets>$(ReactiveUIMauiTestTargets);net9.0;net10.0</ReactiveUIMauiTestTargets>
+    
+    <ReactiveMauiTargets Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIMauiWindowsTargets)</ReactiveMauiTargets>
+    <ReactiveMauiTargets>$(ReactiveMauiTargets);net9.0;net10.0;$(ReactiveUIAndroidTargets)</ReactiveMauiTargets>
     <ReactiveMauiTargets Condition="$([MSBuild]::IsOsPlatform('Windows')) or $([MSBuild]::IsOsPlatform('OSX'))">$(ReactiveMauiTargets);$(ReactiveUIAppleTargets)</ReactiveMauiTargets>
 
     <!-- Modern targets for tests and benchmarks (no netstandard) -->
     <ReactiveUIModernTargets>net8.0;net9.0;net10.0</ReactiveUIModernTargets>
 
+    <ReactiveUITestingTargets>netstandard2.0;$(ReactiveUIModernTargets)</ReactiveUITestingTargets>
+    <ReactiveUITestingTargets Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUITestingTargets);net462;net472</ReactiveUITestingTargets>
+
     <!-- Start with core targets available on all platforms -->
     <ReactiveUIFinalTargetFrameworks>netstandard2.0;$(ReactiveUICoreTargets)</ReactiveUIFinalTargetFrameworks>
 
@@ -81,22 +85,22 @@
 
     <!-- Final target frameworks for tests/benchmarks (modern .NET only, with platform-specific additions) -->
     <ReactiveUIFinalModernTargetFrameworks>$(ReactiveUIModernTargets)</ReactiveUIFinalModernTargetFrameworks>
-    <ReactiveUIFinalModernTargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIFrameworkTargets);$(ReactiveUIWindowsTargets)</ReactiveUIFinalModernTargetFrameworks>
+    <ReactiveUIFinalModernTargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIFinalModernTargetFrameworks);$(ReactiveUIFrameworkTargets);$(ReactiveUIWindowsTargets)</ReactiveUIFinalModernTargetFrameworks>
   </PropertyGroup>
-  
+
   <PropertyGroup>
     <!-- Ensure all test runs use our runsettings to control cross-assembly parallelism -->
     <RunSettingsFilePath>$(MSBuildThisFileDirectory)tests.runsettings</RunSettingsFilePath>
   </PropertyGroup>
-  
+
   <PropertyGroup Condition="$(MSBuildProjectName.Contains('WPF')) != 'true' and '$(IsTestProject)' != 'true' and ($(TargetFramework.StartsWith('net8.0')) or $(TargetFramework.StartsWith('net9.0')) or $(TargetFramework.StartsWith('net10.0')))">
     <IsAotCompatible>true</IsAotCompatible>
   </PropertyGroup>
-  
+
   <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
     <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
   </PropertyGroup>
-  
+
   <ItemGroup Condition="$(IsTestProject)">
     <PackageReference Include="NUnit"/>
     <PackageReference Include="NUnit3TestAdapter"/>
@@ -107,7 +111,7 @@
     <PackageReference Include="coverlet.msbuild" PrivateAssets="All"/>
     <PackageReference Include="Verify.NUnit"/>
   </ItemGroup>
-  
+
   <ItemGroup Condition="'$(IsTestProject)' != 'true'">
     <PackageReference Include="Microsoft.SourceLink.GitHub" PrivateAssets="All"/>
   </ItemGroup>

src/ReactiveUI.Testing/ReactiveUI.Testing.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUITestingTargets)</TargetFrameworks>
     <AssemblyName>ReactiveUI.Testing</AssemblyName>
     <RootNamespace>ReactiveUI.Testing</RootNamespace>
     <PackageDescription>Provides extensions for testing ReactiveUI based applications</PackageDescription>

src/ReactiveUI.Tests/API/ApiApprovalTests.Testing.DotNet10_0.verified.txt

@@ -1,6 +1,4 @@
-[assembly: System.Runtime.Versioning.SupportedOSPlatform("Windows10.0.19041.0")]
-[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v10.0", FrameworkDisplayName=".NET 10.0")]
-[assembly: System.Runtime.Versioning.TargetPlatform("Windows10.0.19041.0")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v10.0", FrameworkDisplayName=".NET 10.0")]
 namespace ReactiveUI.Testing
 {
     public abstract class AppBuilderTestBase

src/ReactiveUI.Tests/API/ApiApprovalTests.Testing.DotNet9_0.verified.txt

@@ -1,6 +1,4 @@
-[assembly: System.Runtime.Versioning.SupportedOSPlatform("Windows10.0.19041.0")]
-[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v9.0", FrameworkDisplayName=".NET 9.0")]
-[assembly: System.Runtime.Versioning.TargetPlatform("Windows10.0.19041.0")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v9.0", FrameworkDisplayName=".NET 9.0")]
 namespace ReactiveUI.Testing
 {
     public abstract class AppBuilderTestBase