Fix ANCM app_offline.htm notification match using QueryCCH

[aw0lid]

Fix ANCM app_offline.htm notification match using QueryCCH

Description

Fixes an issue in file watcher where FILE_WATCHER::HandleChangeCompletion compared the buffer capacity (QuerySizeCCH()) instead of the actual string length (QueryCCH()) against the notified filename length. This made the notification-driven app_offline.htm match path unreachable, causing the application to rely solely on the fallback existence check.

Changes

• Replaced _strFileName.QuerySizeCCH() with _strFileName.QueryCCH() in filewatcher.cpp.
• Added friend class FileWatcherTests in filewatcher.h.
• Added MockAppOfflineTrackingApplication in FakeClasses.cpp.
• Added native unit tests covering exact matches and prefix rejections in filewatcher_tests.cpp.
• include filewatcher_tests.cpp in CommonLibTests.vcxproj.

Fixes #68283

[dotnet-policy-service]

Thanks for your PR, @aw0lid. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[aw0lid]

Hi everyone, could someone please re-run the failed checks? Here are the errors from the build logs:

azure-pipelines/ aspnetcore-ci (Build Monitor Helix Jobs)
Build log #L92
One or more non-monitor pipeline jobs failed.
azure-pipelines/ aspnetcore-ci (Build Monitor Helix Jobs)
Build log #L94
Bash exited with code '1'.

azure-pipelines/ aspnetcore-ci (Build Test: Windows Server x64)
CSC#L0
CSC(0,0): error CS2012: Cannot open 'D:\a\_work\1\s\artifacts\obj\Microsoft.Extensions.Localization.Abstractions\Release\net11.0\Microsoft.Extensions.Localization.Abstractions.pdb' for writing -- The requested operation cannot be performed on a file with a user-mapped section open. : 'D:\a\_work\1\s\artifacts\obj\Microsoft.Extensions.Localization.Abstractions\Release\net11.0\Microsoft.Extensions.Localization.Abstractions.pdb'.

azure-pipelines/ aspnetcore-ci (Build Test: Windows Server x64)
CSC#L0
CSC(0,0): error CS2012: Cannot open 'D:\a\_work\1\s\artifacts\obj\Microsoft.JSInterop\Release\net11.0\Microsoft.JSInterop.pdb' for writing -- The requested operation cannot be performed on a file with a user-mapped section open. : 'D:\a\_work\1\s\artifacts\obj\Microsoft.JSInterop\Release\net11.0\Microsoft.JSInterop.pdb'.

azure-pipelines/ aspnetcore-ci (Build Test: Windows Server x64)
CSC#L0
CSC(0,0): error CS2012: Cannot open 'D:\a\_work\1\s\artifacts\obj\Microsoft.AspNetCore.Components\Release\net11.0\Microsoft.AspNetCore.Components.pdb' for writing -- The requested operation cannot be performed on a file with a user-mapped section open. : 'D:\a\_work\1\s\artifacts\obj\Microsoft.AspNetCore.Components\Release\net11.0\Microsoft.AspNetCore.Components.pdb'.

Thank you!

[martincostello]

could someone please re-run the failed checks?

You can re-run them yourself by closing and re-opening the PR, or merging the latest code from main and pushing that.

[aw0lid]

Hi everyone, a quick update: the core build and test checks have passed successfully. The remaining failures are separate from this PR's changes. The PR is ready for code review. Thank you!

[BrennanConroy]

/ba-g unrelated

[BrennanConroy]

Thanks @aw0lid!