[Libguestfs] [PATCH] sparsify: skip test-virt-sparsify-in-place.sh if discard is not supported

[Pino Toscano]

Try adding a dummy drive with discard enabled as test before using
virt-sparsify --in-place (which needs discard).
---
 sparsify/test-virt-sparsify-in-place.sh | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/sparsify/test-virt-sparsify-in-place.sh b/sparsify/test-virt-sparsify-in-place.sh
index 56311a0..b098c90 100755
--- a/sparsify/test-virt-sparsify-in-place.sh
+++ b/sparsify/test-virt-sparsify-in-place.sh
@@ -29,7 +29,16 @@ if [ "$(../fish/guestfish get-backend)" = "uml" ]; then
     exit 77
 fi
 
-rm -f test-virt-sparsify-in-place.img
+rm -f test-virt-sparsify-in-place.img test-virt-sparsify-in-place-test.img
+
+if ! ../fish/guestfish \
+  disk-create test-virt-sparsify-in-place-test.img raw 200K : \
+  add-drive test-virt-sparsify-in-place-test.img readonly:false discard:enable : \
+  run; then
+    rm -f test-virt-sparsify-in-place-test.img
+    echo "$0: skipping test because discard is not supported"
+    exit 77
+fi
 
 # Create a filesystem, fill it with data, then delete the data.  Then
 # prove that sparsifying it reduces the size of the final filesystem.
@@ -66,4 +75,4 @@ if [ $size_after -gt 15000 ]; then
     exit 1
 fi
 
-rm test-virt-sparsify-in-place.img
+rm test-virt-sparsify-in-place.img test-virt-sparsify-in-place-test.img
-- 
1.8.3.1