[dotnet] Fix current version of IgnoreTargetAttribute in test suite

[RenderMichael]

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Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Bug fix, Enhancement

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Description

• Refactored IgnoreTargetAttribute class for improved clarity and maintainability.

• Added nullability annotations to enhance code safety and modernize the implementation.

• Simplified logic for applying test ignore attributes and improved platform matching.

• Updated platform detection logic to support net8 and added compile-time error for unsupported platforms.

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Changes walkthrough 📝

	Relevant files
Enhancement	IgnoreTargetAttribute.cs Refactored and enhanced `IgnoreTargetAttribute` class        dotnet/test/common/CustomTestAttributes/IgnoreTargetAttribute.cs Refactored IgnoreTargetAttribute to use auto-properties. Improved logic for applying test ignore attributes. Added nullability annotations for better code safety. Updated platform detection logic to support net8. +34/-49

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Incorrect Skip Reason The skip reason property is set to platformToIgnoreAttr.Reason instead of the constructed ignoreReason string that includes both the browser and custom reason test.RunState = RunState.Ignored; test.Properties.Set(PropertyNames.SkipReason, ignoreReason); Platform Check The platform check logic assumes only NET8_0 target framework, but should handle other supported .NET versions or provide clear error handling for unsupported versions #if NET8_0 return "net8"; #else #error Update IgnoreTargetAttribute.CurrentPlatform to the current TFM #endif

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	Add parameter validation to prevent null reference exceptions Add null check for test parameter in ApplyToTest method to prevent potential NullReferenceException. dotnet/test/common/CustomTestAttributes/IgnoreTargetAttribute.cs [48-53] public void ApplyToTest(Test test) { + if (test == null) + { + throw new ArgumentNullException(nameof(test)); + } if (test.RunState is RunState.NotRunnable) { return; } Apply this suggestion Suggestion importance[1-10]: 8 Why: Adding null parameter validation is crucial for preventing runtime errors and maintaining robust code. This is particularly important for public API methods like ApplyToTest.	8
	Add constructor parameter validation to prevent null reference exceptions Add null check for target parameter in constructor to prevent potential issues with null values being passed. dotnet/test/common/CustomTestAttributes/IgnoreTargetAttribute.cs [33-36] public IgnoreTargetAttribute(string target) { + if (target == null) + { + throw new ArgumentNullException(nameof(target)); + } this.Value = target.ToLower(); } Apply this suggestion Suggestion importance[1-10]: 8 Why: Adding null parameter validation in the constructor is essential for preventing runtime errors, especially since the code immediately calls ToLower() on the parameter which would throw if null.	8

[nvborisenko]

Thanks @RenderMichael !