Initial support for wslc E2E testing

[AmelBawa-msft]

🧪 Summary of the Pull Request

Code summary

• Added the foundation for E2E testing for WSLC
• Added E2E tests

Tests added

• WSLCE2E_Container_Create_HelpCommand
• WSLCE2E_Container_Create_MissingImage
• WSLCE2E_Container_Create_InvalidImage
• WSLCE2E_Container_Create_Valid
• WSLCE2E_Container_Create_DuplicateContainerName
• WSLCE2E_Container_HelpCommand
• WSLCE2E_Container_InvalidCommand_DisplaysErrorMessage
• WSLCE2E_HelpCommand
• WSLCE2E_InvalidCommand_DisplaysErrorMessage

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Copilot]

Pull request overview

Adds an initial end-to-end (E2E) test harness for wslc.exe under the existing Windows wsltests suite, including basic help/error-path validations and initial container workflow coverage.

Changes:

• Introduces a WSLCExecutor wrapper to launch wslc.exe, capture stdout/stderr, and verify results.
• Adds E2E test cases for global help/invalid commands and container help/create scenarios.
• Updates the test/windows/wslc CMake wiring to compile the new E2E sources and expose required include paths.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
test/windows/wslc/e2e/WSLCExecutor.h	Declares execution/result structures used by E2E tests.
test/windows/wslc/e2e/WSLCExecutor.cpp	Implements command execution via SubProcess and output verification helpers.
test/windows/wslc/e2e/WSLCExecutorHelpers.h	Declares container-listing helper assertions for E2E tests.
test/windows/wslc/e2e/WSLCExecutorHelpers.cpp	Implements helpers for parsing/list-verifying container outputs.
test/windows/wslc/e2e/WSLCCommand.h	Adds convenience wrappers for building wslc subcommand invocations.
test/windows/wslc/e2e/WSLCE2EGlobalTests.cpp	Adds E2E tests for wslc --help and invalid command behavior.
test/windows/wslc/e2e/WSLCE2EContainerTests.cpp	Adds E2E tests for wslc container --help and invalid subcommand behavior.
test/windows/wslc/e2e/WSLCE2EContainerCreateTests.cpp	Adds E2E tests for wslc container create help/error flows and a create/delete scenario.
test/windows/wslc/CMakeLists.txt	Includes new E2E sources/headers in wsltests and adds test/windows/wslc include path.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 7 comments.

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[benhillis]

few questions.

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

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