From be432bda07c47f8eabc7efccf1259ed75012b8ab Mon Sep 17 00:00:00 2001 From: Anatol Belski Date: Fri, 15 May 2026 01:03:39 +0200 Subject: [PATCH] vm-virtio: checked_descriptor: Add unit test for next_checked success Cover the success path of the DescriptorChainExt::next_checked trait method, asserting that a valid single descriptor is returned as Ok(Some(_)) with the expected addr and len. Signed-off-by: Anatol Belski --- vm-virtio/src/checked_descriptor.rs | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/vm-virtio/src/checked_descriptor.rs b/vm-virtio/src/checked_descriptor.rs index 800f85cc6..744cc8f2e 100644 --- a/vm-virtio/src/checked_descriptor.rs +++ b/vm-virtio/src/checked_descriptor.rs @@ -300,4 +300,17 @@ mod unit_tests { second.unwrap_err(); assert!(it.next().is_none()); } + + #[test] + fn next_checked_returns_valid_descriptor() { + let (_mem, mem_atomic, mut queue) = setup_vq(128 * 1024, 0x4000, 256, 0); + let mem_guard = mem_atomic.memory(); + let mut chain = queue.pop_descriptor_chain(mem_guard).unwrap(); + let desc = chain + .next_checked(None) + .expect("validation must succeed") + .expect("descriptor must be present"); + assert_eq!(desc.addr().0, 0x4000); + assert_eq!(desc.len(), 256); + } }