[PATCH] tests/9p: prevent potential error in do_local_xattr_limit()

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

The local fs backend driver tests require that a dummy file is
created on the host side before running the xattr limit tests,
otherwise the test will fail because the file is expected to exist.

The original call of g_file_set_contents() didn't check its
return value, which might cause subsequent test checks to fail,
making it harder to identify the root cause.

Fix this by simply wrapping the call into a g_assert().

Fixes: 04a62cdfe873 ("tests/9p: add 3 xattr FID limit test cases (local fs driver)")
CID: 1660926
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
---
 tests/qtest/virtio-9p-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c
index cfd3c02da4..692a0e8e3f 100644
--- a/tests/qtest/virtio-9p-test.c
+++ b/tests/qtest/virtio-9p-test.c
@@ -402,7 +402,7 @@ static void do_local_xattr_limit(QVirtio9P *v9p, int max_xattr)
     /*
      * this file must be created for the test to work with the 'local' fs driver
      */
-    g_file_set_contents(test_file, "", 0, NULL);
+    g_assert(g_file_set_contents(test_file, "", 0, NULL));
 
     /* the actual test code shared with the 'synth' fs driver tests */
     do_xattr_limit(v9p, max_xattr, false);
-- 
2.47.3