Support --use-current-runtime / --ucr on dotnet test (MTP)

[Copilot]

dotnet test lacked --use-current-runtime (--ucr) support despite it being available on dotnet build, publish, restore, and store. This change adds support for the MTP code path.

Changes

• TestCommandDefinition.MicrosoftTestingPlatform — replaced standalone PropertiesOption with ImplicitRestoreOptions = new(showHelp: false, useShortOptions: false), calling ImplicitRestoreOptions.AddTo(Options) exactly as BuildCommandDefinition does. This provides --ucr/--use-current-runtime (visible in help) along with the other hidden restore pass-through options.
• Snapshot (MTPHelpSnapshotTests.VerifyMTPHelpOutput.verified.txt) — updated to reflect the new option in MTP help output.

dotnet test --use-current-runtime
dotnet test --ucr
# both produce: --property:UseCurrentRuntimeIdentifier=True

Original prompt

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This section details on the original issue you should resolve

<issue_title>Support --use-current-runtime on dotnet test commands</issue_title>
<issue_description>### Is your feature request related to a problem? Please describe.

In general, where -r is supported, I would expect --arch, --os, and --use-current-runtime and their variants to also be supported.

--ucr is available in the CommonOptions.</issue_description>

Comments on the Issue (you are @copilot in this section)

@Youssef1313 For VSTest, I think this might be tricky to implement and get right (@nohwnd?). But it hopefully should be okay to implement for MTP. I feel like `dotnet test` for MTP should actually use `AddImplicitRestoreOptions` similar to `dotnet build`? But we need to carefully review all the options there. Note that for MTP, I expect that nothing is needed other than really adding the command line option and the forwarding to `UseCurrentRuntimeIdentifier` should do its job as normal.

• Fixes Support --use-current-runtime on dotnet test commands #50369

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[Youssef1313]

@copilot Do not change anything for VSTest. For MTP, use AddImplicitRestoreOptions similar to how BuildCommand do it.

[Copilot]

@copilot Do not change anything for VSTest. For MTP, use AddImplicitRestoreOptions similar to how BuildCommand do it.

Done in 9176c9f. VSTest changes are reverted. For MTP, replaced the standalone UseCurrentRuntimeOption with ImplicitRestoreOptions = new(showHelp: false, useShortOptions: false) and called ImplicitRestoreOptions.AddTo(Options) exactly like BuildCommandDefinition does — this provides --ucr/--use-current-runtime (along with the other hidden restore pass-through options).

[Copilot]

@copilot Do not change anything for VSTest. For MTP, use AddImplicitRestoreOptions similar to how BuildCommand do it.

Done — no VSTest changes. For MTP, ImplicitRestoreOptions = new(showHelp: false, useShortOptions: false) replaces the standalone PropertiesOption, and ImplicitRestoreOptions.AddTo(Options) is called after ArtifactsPathOption (same pattern as BuildCommandDefinition).

[Youssef1313]

Revisiting this again, many options are marked as hidden (because showHelp is false).

I don't have the context on why this was introduced. Are these some options that are kept only for backcompat but we are no longer interested in? So should I avoid using them for MTP dotnet test?

@baronfel Can you please advise here?

[Copilot]

Pull request overview

Adds --use-current-runtime (--ucr) support to the Microsoft Testing Platform (MTP) code path for dotnet test, aligning it with other CLI commands that already forward this switch to MSBuild.

Changes:

• Replaced the standalone PropertiesOption in the MTP dotnet test command definition with ImplicitRestoreOptions (matching dotnet build), which introduces --ucr/--use-current-runtime forwarding.
• Updated the MTP help snapshot to include the new option in dotnet test help output.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/Cli/Microsoft.DotNet.Cli.Definitions/Commands/Test/TestCommandDefinition.MicrosoftTestingPlatform.cs	Uses ImplicitRestoreOptions so MTP dotnet test includes --ucr/--use-current-runtime and other restore passthrough options.
test/dotnet.Tests/CommandTests/Test/snapshots/MTPHelpSnapshotTests.VerifyMTPHelpOutput.verified.txt	Updates the verified help output snapshot to reflect the newly visible --ucr option.

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[nohwnd]

read the suggestion from copilot backwards, probably good idea to block also --ucr when using --test-modules, because that deals with already built artifacts.