qcow: Fix invalid_cluster_bits test

Start with a valid header so the invalid cluster bits field is tested in
isolation. Before this change the test would pass even if the cluster
bits check was removed from the code because the header was invalid for
other reasons.

BUG=none
TEST=this is a test

Change-Id: I5c09417ae3f974522652a50cb0fdc5dc0e10dd44
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1660889
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/qcow/src/qcow.rs b/qcow/src/qcow.rs
index 4aeb7e3..4b781f4 100644
--- a/qcow/src/qcow.rs
+++ b/qcow/src/qcow.rs
@@ -1793,9 +1793,9 @@ mod tests {
 
     #[test]
     fn invalid_cluster_bits() {
-        let mut header = test_huge_header();
+        let mut header = valid_header();
         header[23] = 3;
-        with_basic_file(&test_huge_header(), |disk_file: File| {
+        with_basic_file(&header, |disk_file: File| {
             QcowFile::from(disk_file).expect_err("Failed to create file.");
         });
     }