SMB comprehensive unit tests (229 passed, 0 failed)
smb_server_backend.rs tests (+135 lines):
- Full VfsHandle lifecycle: file create/write/read/flush/close, stat,
truncate (zero + extend), set_times, list_dir error, write past end
- Directory: create/stat/list/close, contains-created-file, read/write/truncate
error cases
- All OpenIntent variants: Create (new + existing fail), OpenOrCreate
(new + existing), OverwriteOrCreate (new + truncate existing), Truncate
(existing + nonexistent fail)
- Directory OpenIntent: Create (new + existing fail), Open (existing),
OpenOrCreate (new + existing)
- non_directory flag on dir (IsDirectory), directory flag on file (NotADirectory)
- Unlink: file, directory, nonexistent (NotFound)
- Rename: success + content preserved, nonexistent source (NotFound),
existing target (Exists)
- Error mapping: all 8 VfsError variants (adds Unsupported, UnexpectedEof)
- FILETIME: roundtrip, below-offset returns epoch, exactly-offset
- vfs_stat_to_file_info: custom name, dir name from path, alloc_size
smb_fs.rs tests (+40 lines):
- Error mapping: NotFound, AlreadyExists, AccessDenied, IsADirectory,
NotADirectory, DiskFull, SharingViolation, ConnectionLost, TimedOut,
SessionExpired, InvalidData, Auth, Io, Cancelled
- Filetime: conversion, below-epoch, exact epoch boundary
- Path: leading slash stripping, root, deep paths
- Rejects trailing backslash
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