feat: add disposal execution support in hook executors and related tests

[thomhurst]

Fixes #3918

[claude]

Claude finished @thomhurst's task —— View job

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Code Review Complete ✅

I've thoroughly reviewed this PR that adds disposal execution support in hook executors. Here's my comprehensive analysis:

Todo List

• Read repository guidelines (CLAUDE.md)
• Analyze all changed files to understand the implementation
• Review code quality and best practices
• Check for potential bugs or issues
• Evaluate performance considerations
• Assess security concerns
• Evaluate test coverage
• Provide comprehensive review feedback

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📝 Summary

This PR adds the ability for hook executors to wrap disposal operations, enabling users to control the execution context for test class disposal (e.g., running disposal on UI thread). This addresses issue #3918.

✅ Positives

Excellent Design & Implementation

• Clean API Design: The ExecuteDisposal method follows the same pattern as other hook executor methods
• Framework-Level Handling: Proper default implementation with conditional compilation for .NET Standard 2.0
• Dual-Mode Support: Changes support both source-generated and reflection modes as required by TUnit's architecture

Code Quality

• Modern C# Usage: Proper use of ValueTask, conditional compilation, and clean async patterns
• Consistent Patterns: Implementation follows existing TUnit conventions and coding style
• Proper Error Handling: Disposal errors are properly swallowed to prevent test failures (line 281-284 in TestExecutor.cs:283)

Comprehensive Testing

• Real-world Scenario: Tests demonstrate actual use cases with custom executors
• Thread Context Verification: Tests verify disposal runs in the correct execution context
• Integration Testing: Uses SetBothExecutorsAttribute to test the complete workflow

🔍 Technical Analysis

API Changes

// Added to IHookExecutor interface
ValueTask ExecuteDisposal(TestContext context, Func<ValueTask> action);

Key Implementation Points

1. IHookExecutor.cs: Adds new disposal execution method with conditional implementation
2. GenericAbstractExecutor.cs: Provides base implementation delegating to ExecuteAsync
3. TestExecutor.cs: Integrates disposal execution into the test lifecycle (lines 272-279)
4. TestCoordinator.cs: Ensures disposal is called with the configured hook executor (line 157)

🚨 Issues Found

Minor Issues

1. Missing Documentation - Consider adding XML documentation to the new method:

   /// <summary>
   /// Executes disposal logic for test instances, allowing custom executors to control disposal context.
   /// </summary>
   /// <param name="context">The test context</param>
   /// <param name="action">The disposal action to execute</param>
   ValueTask ExecuteDisposal(TestContext context, Func<ValueTask> action);

2. Conditional Compilation Logic - The conditional compilation in IHookExecutor.cs lines 17-22 could be clearer:

   // Current approach works but could be more explicit
   #if NETSTANDARD2_0
       ValueTask ExecuteDisposal(TestContext context, Func<ValueTask> action);
   #else
       ValueTask ExecuteDisposal(TestContext context, Func<ValueTask> action)
           => action();
   #endif

Potential Improvements

1. Performance: The implementation is already optimal - no allocations in hot path, proper async patterns
2. Error Handling: Disposal errors are properly handled (swallowed) which is correct behavior
3. Thread Safety: No thread safety concerns - each test instance is isolated

🔒 Security Assessment

• No Security Issues: The changes don't introduce any security vulnerabilities
• Proper Isolation: Disposal execution remains isolated per test instance
• No Privilege Escalation: Hook executors maintain same security context as other operations

🏎️ Performance Considerations

• Minimal Overhead: Single additional method call in disposal path
• No Allocations: Uses existing ValueTask patterns without additional allocations
• Hot Path Impact: Changes don't affect test discovery or execution hot paths

🧪 Test Coverage Assessment

Excellent Test Coverage

• ✅ Basic Functionality: Tests verify disposal runs with custom executor
• ✅ Integration: Tests work with SetBothExecutorsAttribute
• ✅ Thread Context: Verifies disposal runs in correct execution context
• ✅ Real-world Scenario: Tests mimic actual user requirements

Test Quality

• Uses proper assertions with TUnit's assertion framework
• Tests are deterministic and isolated
• Covers both positive test cases and integration scenarios

📋 Dual-Mode Compliance

✅ Follows TUnit's Dual-Mode Requirements:

• Changes affect both source-generated and reflection execution paths
• API additions are consistent across both modes
• No mode-specific behavior differences introduced

🏁 Overall Assessment

This is a well-implemented, low-risk change that:

• Addresses a real user need (UI thread disposal execution)
• Follows TUnit's architectural patterns perfectly
• Maintains backward compatibility
• Has comprehensive test coverage
• Introduces minimal performance overhead

Recommendation: ✅ APPROVE

The implementation is solid, follows best practices, and the test coverage adequately demonstrates the functionality. The minor documentation suggestion is non-blocking.

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