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block: vhd: Test that physical size includes footer

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The physical size of a fixed VHD is the data region plus the 512
byte footer. Verify it differs from the logical size.

Assisted-by: Claude:Opus-4.6
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This commit is contained in:
Anatol Belski
2026-04-23 00:17:06 +02:00
committed by Bo Chen
parent 07ce8e0745
commit 63cc26e1ce
1 changed files with 9 additions and 1 deletions
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10
block/src/fixed_vhd_disk.rs
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@@ -125,7 +125,7 @@ mod unit_tests {
use super::*;
use crate::async_io::AsyncIo;
use crate::disk_file::{AsyncDiskFile, DiskSize, Resizable};
use crate::disk_file::{AsyncDiskFile, DiskSize, PhysicalSize, Resizable};
/// Minimal fixed VHD footer (disk type = 2, current_size = 0x11223344).
fn fixed_vhd_footer() -> &'static [u8] {
@@ -211,4 +211,12 @@ mod unit_tests {
let mut disk = FixedVhdDisk::new(file, false).unwrap();
assert!(disk.resize(0x2000_0000).is_err());
}
#[test]
fn physical_size_includes_footer() {
let file = make_vhd_file();
let disk = FixedVhdDisk::new(file, false).unwrap();
// Data region (0x1122_3344) + VHD footer (0x200).
assert_eq!(disk.physical_size().unwrap(), 0x1122_3344 + 0x200);
}
}