NUnit Migration: `[Ignore]` attribute not converted to `[Skip]`

[thomhurst]

Description

When running the TUnit NUnit migration code fixer, the NUnit [Ignore] attribute is not converted to TUnit's [Skip] attribute.

Steps to Reproduce

1. Create a project with NUnit tests that use [Ignore] attribute
2. Add TUnit packages
3. Run dotnet format analyzers --severity info --diagnostics TUNU0001
4. Build the project

Expected Behavior

[Ignore("reason")] should be converted to [Skip("reason")]

Actual Behavior

The [Ignore] attribute is left unchanged, causing build errors:

error CS0246: The type or namespace name 'Ignore' could not be found
error CS0246: The type or namespace name 'IgnoreAttribute' could not be found

Example

Before migration:

[Test]
[Ignore("I don't see any simple way of doing this...")]
public void Should_properly_interpret_array_of_objects()
{
    // test code
}

After migration (current):

[Test]
[Ignore("I don't see any simple way of doing this...")]  // <-- Not converted
public async Task Should_properly_interpret_array_of_objects()
{
    // test code
}

Expected after migration:

[Test]
[Skip("I don't see any simple way of doing this...")]
public async Task Should_properly_interpret_array_of_objects()
{
    // test code
}

Environment

• TUnit version: 1.9.91
• .NET version: .NET 8.0
• OS: Windows

[claude]

Issue Analysis

Type: Bug - Migration Tool Defect
Priority: High
Component: NUnit Migration Analyzer (TUNU0001)

Context

This issue is part of a series of NUnit migration bugs discovered during actual migration work (see related issues #4337, #4339, #4340, #4341, #4342, #4343).

Technical Details

The NUnit migration code fixer should map the following attribute conversion:

• NUnit: [Ignore("reason")]
• TUnit: [Skip("reason")]

This is a straightforward attribute replacement similar to other attribute conversions already implemented in the migration tool.

Impact

• Build Failure: Code doesn't compile after migration
• User Experience: Requires manual intervention during migration
• Common Scenario: Ignored tests are common in test suites

Suggested Fix

Add attribute mapping in the TUNU0001 analyzer/code fixer to handle the Ignore → Skip conversion alongside existing attribute transformations.

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Analyzed and labeled by Claude Code