tests: write to file before of using grep

It avoids some random sigpipes during the tests

Signed-off-by: Giuseppe Scrivano <[email protected]>

tests/integration/test_system_containers.sh

@@ -29,7 +29,8 @@ docker save atomic-test-system > ${WORK_DIR}/atomic-test-system.tar
 ${ATOMIC} pull dockertar:/${WORK_DIR}/atomic-test-system.tar
 
 # Check that the branch is created in the OSTree repository
-ostree --repo=${ATOMIC_OSTREE_REPO} refs | grep -q "ociimage/atomic-test-system-latest"
+ostree --repo=${ATOMIC_OSTREE_REPO} refs > refs
+grep -q "ociimage/atomic-test-system-latest" refs
 
 ${ATOMIC} images list > ${WORK_DIR}/images
 grep -q "atomic-test-system" ${WORK_DIR}/images
@@ -53,10 +54,14 @@ trap teardown EXIT
 
 ${ATOMIC} --debug install --name=${NAME} --set=RECEIVER=${SECRET} --system oci:atomic-test-system
 
-${ATOMIC} ps | grep -q "test-system"
-${ATOMIC} ps --json | grep -q "test-system"
-${ATOMIC} ps --all | grep -q "test-system"
-${ATOMIC} ps --json --all | grep -q "test-system"
+${ATOMIC} ps > ps.out
+grep -q "test-system" ps.out
+${ATOMIC} ps --json > ps.out
+grep -q "test-system" ps.out
+${ATOMIC} ps --all > ps.out
+grep -q "test-system" ps.out
+${ATOMIC} ps --json --all > ps.out
+grep -q "test-system" ps.out
 
 test -e /etc/systemd/system/${NAME}.service
 
@@ -101,9 +106,11 @@ test \! -e ${ATOMIC_OSTREE_CHECKOUT_PATH}/${NAME}.1
 
 
 ${ATOMIC} pull docker.io/busybox
-ostree --repo=${ATOMIC_OSTREE_REPO} refs | grep busybox
+ostree --repo=${ATOMIC_OSTREE_REPO} refs > refs
+grep -q busybox refs
 ${ATOMIC} images delete -f busybox
-OUTPUT=$(! ostree --repo=${ATOMIC_OSTREE_REPO} refs | grep -c busybox)
+ostree --repo=${ATOMIC_OSTREE_REPO} refs > refs
+OUTPUT=$(! grep -c busybox refs)
 if test $OUTPUT \!= 0; then
     exit 1
 fi
@@ -114,7 +121,8 @@ ostree --repo=${ATOMIC_OSTREE_REPO} refs | grep busybox
 ${ATOMIC} images delete -f atomic-test-system
 ${ATOMIC} images delete -f busybox
 ${ATOMIC} images prune
-OUTPUT=$(! ostree --repo=${ATOMIC_OSTREE_REPO} refs | grep -c ociimage)
+ostree --repo=${ATOMIC_OSTREE_REPO} refs > refs
+OUTPUT=$(! grep -c ociimage refs)
 if test $OUTPUT \!= 0; then
     exit 1
 fi