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Fixes #3607

@claude
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claude bot commented Oct 30, 2025

Claude finished @thomhurst's task —— View job


Pull Request Review: Enhanced Skip Functionality with Dynamic Skip Reasons

Review Checklist:

  • Read repository guidelines (CLAUDE.md)
  • Analyze core changes in SkipAttribute.cs
  • Review TestRegisteredContext.cs changes
  • Examine test coverage in Engine.Tests
  • Review integration tests in TestProject
  • Check public API changes
  • Evaluate code quality and best practices
  • Assess performance considerations
  • Check for security concerns
  • Provide final recommendations

✅ Overall Assessment: APPROVED with Minor Suggestions

This PR successfully implements dynamic skip functionality while maintaining backward compatibility and following TUnit's design principles.

🎯 Strengths

1. Code Quality & Design

  • Excellent extensibility design: Virtual methods ShouldSkip() and GetSkipReason() provide clean extension points
  • Backward compatibility: Existing SkipAttribute usage remains unchanged
  • Proper async patterns: Task<bool> return type follows TUnit conventions
  • Modern C# usage: Uses modern syntax and patterns consistently

2. Documentation & Examples

  • Comprehensive XML documentation with detailed examples
  • Multiple implementation patterns demonstrated in test files
  • Clear usage scenarios showing both ITestRegisteredEventReceiver and SkipAttribute inheritance approaches

3. Test Coverage

  • Excellent test coverage with both unit tests (Engine.Tests) and integration tests (TestProject)
  • Multiple test scenarios: Static skip, dynamic skip reasons, conditional skipping
  • Real-world examples: Device-specific skip scenarios that demonstrate practical usage

4. Public API Changes

  • Properly tracked: All API changes correctly captured in snapshot files
  • Non-breaking: Only adds new virtual methods to existing attribute

🔧 Technical Implementation

SkipAttribute.cs (Lines 75 & 106)

public virtual Task<bool> ShouldSkip(TestRegisteredContext context) => Task.FromResult(true);
protected virtual string GetSkipReason(TestRegisteredContext context) => Reason;

Well-designed extension points that enable:

  • Conditional skipping based on runtime state
  • Dynamic reason generation with access to test context
  • Inheritance-based customization

TestRegisteredContext.cs (Lines 60-64)

public void SetSkipped(string reason)
{
    TestContext.SkipReason = reason;
    TestContext.Metadata.TestDetails.ClassInstance = SkippedTestInstance.Instance;
}

Clean API for programmatic test skipping during registration

🚀 Performance Considerations

  • Minimal overhead: Virtual method calls are acceptable in test registration phase (not hot path)
  • Async-ready: Task<bool> return allows for async conditional logic without blocking
  • No allocations: Default implementations are efficient

🔒 Security Assessment

  • No security concerns: Changes are limited to test execution control
  • Safe extensibility: Virtual methods don't expose sensitive operations

💡 Minor Suggestions for Enhancement

1. Consider ValueTask Pattern (Optional)

For potentially synchronous operations, consider ValueTask<bool>:

public virtual ValueTask<bool> ShouldSkip(TestRegisteredContext context) 
    => new(true);

This would align with TUnit's performance-first philosophy, though the impact is minimal in test registration.

2. Null Safety Enhancement (Optional)

Add null checks in GetSkipReason() for robustness:

protected virtual string GetSkipReason(TestRegisteredContext context) 
    => context?.TestName != null ? Reason : "Test skipped";

3. Consider Caching (Future Enhancement)

For expensive ShouldSkip() operations, consider caching results based on context characteristics.

Compliance with TUnit Guidelines

Requirement Status Notes
Dual-Mode Implementation N/A Attribute-only change, works in both modes
Snapshot Testing Complete Public API snapshots properly updated
Performance First Good No impact on hot paths
AOT Compatibility Compatible No reflection usage in new code
Modern C# Syntax Excellent Uses latest patterns

🎯 Test Scenarios Validated

  1. Static skip with dynamic reasons
  2. Conditional skipping based on runtime state
  3. Multiple inheritance patterns
  4. Integration with existing skip behavior

📊 Impact Assessment

  • Breaking Changes: ❌ None
  • Performance Impact: ✅ Negligible (test registration only)
  • Memory Impact: ✅ Minimal
  • Compatibility: ✅ Full backward compatibility maintained

🚀 Recommendation: MERGE

This PR is ready for merge as it:

  • ✅ Implements the requested feature completely
  • ✅ Maintains backward compatibility
  • ✅ Follows all TUnit development guidelines
  • ✅ Includes comprehensive test coverage
  • ✅ Updates public API snapshots correctly
  • ✅ Provides excellent documentation and examples

The enhancement significantly improves TUnit's skip functionality while maintaining the framework's high standards for code quality and performance.


@claude
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claude bot commented Oct 30, 2025

Claude finished @thomhurst's task —— View job


🔍 Code Review: Dynamic Skip Functionality Enhancement

Overall Assessment: Excellent Implementation

This PR successfully enhances TUnit's skip functionality with dynamic skip reasons while maintaining the framework's core principles. The implementation is well-designed, thoroughly tested, and follows TUnit's architectural patterns.


📊 Review Summary

✅ Strengths:

  • Excellent extensibility design with two approaches (ShouldSkip() override and SetSkipped() method)
  • Comprehensive test coverage with realistic use cases
  • Proper API snapshot updates across all target frameworks
  • Clean, well-documented code with excellent XML documentation
  • Performance-conscious implementation with minimal allocations

⚠️ Areas for Consideration:

  • Minor: Documentation could clarify dual-mode support expectations
  • Minor: Consider adding performance benchmarks for skip evaluation

🏗️ Architecture & Design Quality

Score: 9/10

The design elegantly extends the existing SkipAttribute with two complementary approaches:

  1. Virtual method override approach (GetSkipReason() + ShouldSkip())

    • Clean inheritance model
    • Familiar pattern for TUnit users
    • Excellent for conditional skipping logic
  2. Direct context manipulation (TestRegisteredContext.SetSkipped())

    • More flexible for complex scenarios
    • Allows any ITestRegisteredEventReceiver to skip tests
    • Great for custom attributes without inheritance

Key Design Strengths:

  • Single Responsibility: Each method has a clear, focused purpose
  • Open/Closed Principle: Extensible without modifying core classes
  • Backwards Compatibility: Existing SkipAttribute usage remains unchanged

🧪 Test Coverage & Quality

Score: 9/10

The test suite is comprehensive and well-structured:

TUnit.Engine.Tests/DynamicSkipReasonTests.cs:

  • Tests both implementation approaches
  • Verifies skip behavior and pass-through scenarios
  • Uses proper filter patterns following CLAUDE.md guidelines
  • Correctly expects "Failed" outcome for skipped tests (integration test behavior)

TUnit.TestProject/DynamicSkipReasonTests.cs:

  • Excellent real-world examples showing practical usage patterns
  • Device-specific skip scenarios (common use case)
  • Conditional skip logic with allowed/disallowed lists
  • Clear demonstration of both extensibility approaches

Test Quality Highlights:

// Excellent example showing dynamic reason generation
protected override string GetSkipReason(TestRegisteredContext context)
{
    return $"Test '{context.TestName}' skipped for device '{_deviceName}' via GetSkipReason override";
}

🚀 Performance Analysis

Score: 8/10

The implementation follows TUnit's performance-first principles:

Positive Performance Aspects:

  • Task<bool> ShouldSkip() uses Task.FromResult() for synchronous cases
  • No unnecessary allocations in hot paths
  • Virtual method calls are minimal (only during test registration)
  • String formatting only occurs when tests are actually skipped

Performance Considerations:

  • Skip evaluation happens during test registration (not hot execution path)
  • Dynamic reason generation is called only for skipped tests
  • No reflection overhead beyond existing TUnit patterns

🔒 Security Assessment

Score: 10/10

No security concerns identified:

  • No dynamic code generation or eval patterns
  • No external dependencies introduced
  • No sensitive data exposure in skip reasons
  • Input validation handled appropriately

📝 Code Quality & Standards

Score: 9/10

The code excellently follows TUnit's style guidelines:

Strengths:

// ✅ Excellent XML documentation with examples
/// <summary>
/// Gets the skip reason for the test.
/// </summary>
/// <param name="context">The test context containing information about the test being registered.</param>
/// <returns>The reason why the test should be skipped.</returns>

// ✅ Modern C# patterns
public virtual Task<bool> ShouldSkip(TestRegisteredContext context) => Task.FromResult(true);

// ✅ Collection expressions
private static readonly string[] AllowedDevices = ["AllowedDevice", "AnotherAllowedDevice"];

Minor Improvement Opportunities:

  • The example in SkipAttribute.cs:32 has an XML encoding issue (&lt; instead of <)
  • Consider adding [MethodImpl(MethodImplOptions.AggressiveInlining)] to GetSkipReason() if called frequently

🔄 Dual-Mode Compatibility Assessment

Score: 8/10

The feature appears compatible with both execution modes:

Source Generator Mode: Skip logic is evaluated during test registration, which occurs before code generation
Reflection Mode: Uses the same ITestRegisteredEventReceiver pattern that reflection mode already supports

Recommendation: Consider adding explicit dual-mode tests to verify identical behavior across both modes, following the pattern in CLAUDE.md:

[Test]
[Arguments(ExecutionMode.SourceGenerated)]
[Arguments(ExecutionMode.Reflection)]
public async Task DynamicSkip_BehavesIdentically(ExecutionMode mode) { }

📋 API Design Excellence

Score: 10/10

The API surface additions are minimal and intuitive:

New SkipAttribute Members:

public virtual Task<bool> ShouldSkip(TestRegisteredContext context)
protected virtual string GetSkipReason(TestRegisteredContext context)

New TestRegisteredContext Member:

public void SetSkipped(string reason)

API Design Strengths:

  • Intuitive naming: Method names clearly indicate their purpose
  • Appropriate visibility: protected virtual allows inheritance while preventing misuse
  • Consistent patterns: Follows existing TUnit context patterns
  • Type safety: Strong typing prevents runtime errors

🎯 Practical Usage Excellence

The PR includes excellent examples showing real-world scenarios:

// Device-specific skipping
[CustomSkipViaSetSkipped("TestDevice123")]

// Dynamic OS-based skipping  
public class SkipOnLinuxAttribute : SkipAttribute
{
    public override Task<bool> ShouldSkip(TestRegisteredContext context)
    {
        return Task.FromResult(RuntimeInformation.IsOSPlatform(OSPlatform.Linux));
    }
}

These examples demonstrate clear use cases that developers will immediately understand and adopt.


📚 Documentation Quality

Score: 9/10

Excellent XML Documentation:

  • Comprehensive method summaries
  • Clear parameter descriptions
  • Practical code examples
  • Usage guidelines and patterns

Suggestions:

  • Fix XML encoding in example (line 32)
  • Consider adding remarks about performance characteristics
  • Document dual-mode compatibility expectations

🏁 Final Recommendation

✅ APPROVE - Ready to merge

This is a high-quality implementation that enhances TUnit's skip functionality while maintaining all framework principles. The feature is well-designed, thoroughly tested, and properly documented.

Minor follow-up suggestions (non-blocking):

  1. Add explicit dual-mode compatibility tests
  2. Fix XML documentation encoding issue
  3. Consider performance benchmarks for complex skip conditions

Impact: This enhancement significantly improves TUnit's flexibility for conditional test execution, enabling powerful scenarios like device-specific, environment-specific, and dynamic condition-based test skipping.

@thomhurst thomhurst changed the title feat(tests): enhance skip functionality with dynamic skip reasons feat: enhance skip functionality with dynamic skip reasons Oct 30, 2025
@thomhurst thomhurst disabled auto-merge October 30, 2025 17:46
@thomhurst thomhurst merged commit f9c4166 into main Oct 30, 2025
13 checks passed
@thomhurst thomhurst deleted the bugs/3607 branch October 30, 2025 17:50
This was referenced Nov 3, 2025
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Allow overriding / setting of SkipAttribute.Reason

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