Decouple extension version reporting from MTP AppVersion while preserving CrashDump forward compatibility

[Copilot]

Extensions were reporting Version via Microsoft.Testing.Platform.Helpers.AppVersion.DefaultSemVer (through IVT), which incorrectly ties extension version identity to the loaded MTP version. This breaks version accuracy when extension and platform versions differ.

• Version source correction (extension-local, not platform-local)

  • Added ExtensionVersion helper in each affected extension assembly.
  • Version properties now resolve from the extension assembly metadata (AssemblyInformationalVersionAttribute, fallback to assembly version), instead of AppVersion.DefaultSemVer.

• CrashDump forward-compatibility adjustment

  • Kept InternalsVisibleTo from Microsoft.Testing.Platform to Microsoft.Testing.Extensions.CrashDump.
  • This is required for forward compatibility with previously shipped CrashDump extension binaries that still access platform internals at runtime.

• Touched extension areas

  • AzureDevOpsReport
  • CrashDump
  • HangDump
  • MSBuild
  • Retry
  • TrxReport
  • VSTestBridge

• Focused regression coverage

  • Added unit tests asserting representative extension providers read version from their own assembly path (via extension-local ExtensionVersion) rather than MTP AppVersion.

internal static class ExtensionVersion
{
    public static readonly string DefaultSemVer = GetDefaultSemVer();

    private static string GetDefaultSemVer()
    {
        Assembly extensionAssembly = typeof(ExtensionVersion).Assembly;
        return extensionAssembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion
            ?? extensionAssembly.GetName().Version?.ToString()
            ?? string.Empty;
    }
}

// before: public string Version => AppVersion.DefaultSemVer;
public string Version => ExtensionVersion.DefaultSemVer;

[Evangelink]

@copilot pipeline is red, please fix issues

[Copilot]

@copilot pipeline is red, please fix issues

Pushed a fix in 19b6c12 to address the pipeline issue path: I added an explicit System.Reflection import in ExtensionVersionTests and revalidated with warnings-as-errors build plus targeted extensions unit tests (all passing). Please re-run the PR pipeline on latest commit 19b6c12.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dev.azure.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[Evangelink]

@copilot there is a test failure:

Check failure on line 665 in src/TestFramework/TestFramework/Assertions/Assert.AreEqual.cs

@azure-pipelines
azure-pipelines
/ microsoft.testfx (Build Linux Debug)
src/TestFramework/TestFramework/Assertions/Assert.AreEqual.cs#L665

src/TestFramework/TestFramework/Assertions/Assert.AreEqual.cs(665,1): error : [NewerPlatform_WithPreviousExtensions_ShouldExecuteTests] [net11.0] Assert.AreEqual failed. Expected:<0>. Actual:<1>. 'expected' expression: 'exitCode', 'actual' expression: 'testHostResult.ExitCode'. Expression 'AssertExitCodeIs' failed for member 'NewerPlatform_WithPreviousExtensions_ShouldExecuteTests' at line 17 of file '/_/test/IntegrationTests/Microsoft.Testing.Platform.Acceptance.IntegrationTests/ForwardCompatibilityTests.cs'. Output of the test host is:
Command: /mnt/vss/_work/1/s/artifacts/tmp/Debug/testsuite/fKP7l/ForwardCompatibilityTest/bin/Release/net10.0/ForwardCompatibilityTest --crashdump --hangdump --report-trx --retry-failed-tests 3

ExitCode: 1

StandardOutput:
Microsoft.Testing.Platform v2.3.0-ci (UTC 04/17/2026) [linux-x64 - net10.0]
Test host process exited before the retry service could connect to it. Exit code: 134

StandardError:
Unhandled exception. System.MethodAccessException: Attempt by method 'Microsoft.Testing.Extensions.CrashDumpExtensions+<>c__DisplayClass0_0.b__0(System.IServiceProvider)' to access method 'Microsoft.Testing.Platform.Services.ServiceProviderExtensions.GetTestApplicationModuleInfo(System.IServiceProvider)' failed.
at Microsoft.Testing.Extensions.CrashDumpExtensions.<>c__DisplayClass0_0.b__0(IServiceProvider serviceProvider) in //src/Platform/Microsoft.Testing.Extensions.CrashDump/CrashDumpExtensions.cs:line 32
at Microsoft.Testing.Platform.TestHostControllers.TestHostControllersManager.BuildAsync(ServiceProvider serviceProvider) in //src/Platform/Microsoft.Testing.Platform/TestHostControllers/TestHostControllersManager.cs:line 120
at Microsoft.Testing.Platform.Hosts.TestHostBuilder.BuildAsync(ApplicationLoggingState loggingState, TestApplicationOptions testApplicationOptions, IUnhandledExceptionsHandler unhandledExceptionsHandler, DateTimeOffset createBuilderStart) in //src/Platform/Microsoft.Testing.Platform/Hosts/TestHostBuilder.cs:line 447
at Microsoft.Testing.Platform.Builder.TestApplicationBuilder.BuildAsync() in //src/Platform/Microsoft.Testing.Platform/Builder/TestApplicationBuilder.cs:line 120
at Program.Main(String[] args) in /mnt/vss/_work/1/s/artifacts/tmp/Debug/testsuite/fKP7l/ForwardCompatibilityTest/Program.cs:line 26
at Program.

(String[] args)

[Copilot]

@copilot there is a test failure:

[Check failure on line 665 in src/TestFramework/TestFramework/Assertions/Assert.AreEqual.cs](https://github.com/microsoft/testfx/pull/7743/files#annotation_5188211...

Fixed in e9afe78: restored InternalsVisibleTo from Microsoft.Testing.Platform to Microsoft.Testing.Extensions.CrashDump to preserve forward compatibility with previous CrashDump extension binaries and avoid the reported MethodAccessException path. I also validated targeted builds/tests locally; the specific forward-compatibility test could not be fully executed in this sandbox due transient package-feed download failures (Resource temporarily unavailable) when restoring 2.2.1 extensions.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 11vvsblobprodcus336.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• 1k9vsblobprodcus379.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• 7k6vsblobprodcus337.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• 7tjvsblobprodcus341.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• 80zvsblobprodcus35.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• cflvsblobprodcus383.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/kiCDy/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)
• jrqvsblobprodcus343.vsblob.vsassets.io
  • Triggering command: /home/REDACTED/work/testfx/testfx//.dotnet/dotnet /home/REDACTED/work/testfx/testfx//.dotnet/dotnet build /home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/qOqzx/ForwardCompatibilityTest -c Release -p:MSBuildTreatWarningsAsErrors=true -p:TreatWarningsAsErrors=true -p:SuppressNETCoreSdkPreviewMessage=true -bl:/home/REDACTED/work/testfx/testfx/artifacts/tmp/Debug/testsuite/ForwardCompatibilityTest-1.binlog (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)