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feat: prepare support for .NET 11 - #1569
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🟡 Changes recommended
The prerelease dependency triggers NU5104 when packing stable releases, and warnings-as-errors causes the stable release build to fail.
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What changed in this PR
Prepares System.IO.Abstractions for .NET 11, exposing the new hard-link and null-handle APIs while preserving explicit unsupported behavior in the in-memory mocks.
Changes:
- Adds the .NET 11 target, SDK selection, feature flags, and interface dependency.
- Adds abstract APIs, BCL wrappers, and mock implementations that throw
NotSupportedException. - Adds .NET 11 API baselines and parity snapshots.
| File | Description |
|---|---|
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/ApiParityTests.cs | Selects .NET 11 parity snapshots. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.Path_.NET 11.0.snap | Records Path parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.FileVersionInfo_.NET 11.0.snap | Records FileVersionInfo parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.FileSystemWatcher_.NET 11.0.snap | Records FileSystemWatcher parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.FileInfo_.NET 11.0.snap | Records FileInfo parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.File_.NET 11.0.snap | Records File parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.DriveInfo_.NET 11.0.snap | Records DriveInfo parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.DirectoryInfo_.NET 11.0.snap | Records DirectoryInfo parity. |
| tests/TestableIO.System.IO.Abstractions.Parity.Tests/__snapshots__/ApiParityTests.Directory_.NET 11.0.snap | Records Directory parity. |
| tests/TestableIO.System.IO.Abstractions.Api.Tests/Expected/TestableIO.System.IO.Abstractions.Wrappers_net11.0.txt | Adds the wrapper API baseline. |
| tests/TestableIO.System.IO.Abstractions.Api.Tests/Expected/TestableIO.System.IO.Abstractions.TestingHelpers_net11.0.txt | Adds the mock API baseline. |
| tests/Directory.Build.props | Adds the .NET 11 test target. |
| src/TestableIO.System.IO.Abstractions.Wrappers/FileWrapper.cs | Delegates hard-link and null-handle operations to the BCL. |
| src/TestableIO.System.IO.Abstractions.Wrappers/FileInfoWrapper.cs | Delegates hard-link creation to FileInfo. |
| src/TestableIO.System.IO.Abstractions.Wrappers/FileInfoBase.cs | Declares the hard-link API. |
| src/TestableIO.System.IO.Abstractions.Wrappers/FileBase.cs | Declares hard-link and null-handle APIs. |
| src/TestableIO.System.IO.Abstractions.TestingHelpers/Properties/Resources.resx | Adds unsupported-operation messages. |
| src/TestableIO.System.IO.Abstractions.TestingHelpers/MockFileInfo.cs | Rejects mock FileInfo hard-link creation. |
| src/TestableIO.System.IO.Abstractions.TestingHelpers/MockFile.cs | Rejects mock hard-link and null-handle operations. |
| src/TestableIO.System.IO.Abstractions.TestingHelpers/CommonExceptions.cs | Centralizes the new exceptions. |
| src/Directory.Build.props | Adds the .NET 11 library target. |
| global.json | Selects the .NET 11 prerelease SDK. |
| Directory.Packages.props | Updates the interface dependency. |
| Directory.Build.props | Enables existing and new features for .NET 11. |
| .github/workflows/ci.yml | Installs the SDK selected by global.json. |
| .github/workflows/build.yml | Installs the selected SDK for testing and packaging. |
Review effort: Balanced
Testably.Abstractions.FileSystem.Interface 11.0.0-pre.1 only exposes the new hard link and null handle APIs on net11.0, so the target is needed to keep parity with the BCL. MockFileSystem cannot model hard links or provide a SafeFileHandle yet, so the mocks throw NotSupportedException.
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November 4, 2026 19:19
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This pull request is merged. |
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This is addressed in release v23.0.0. |
This was referenced Nov 11, 2026
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This was referenced Nov 11, 2026
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Bump TestableIO.System.IO.Abstractions.TestingHelpers from 22.3.0 to 23.0.0
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Testably.Abstractions.FileSystem.Interface 11.0.0-pre.1 only exposes the new hard link and null handle APIs on net11.0, so the target is needed to keep parity with the BCL. MockFileSystem cannot model hard links or provide a SafeFileHandle yet, so the mocks throw NotSupportedException.