btrfs-progs: tests: test --dry-run for subvolume delete

Signed-off-by: David Sterba <dsterba@suse.com>

Author: kdave

tests/cli-tests/020-dry-run/test.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# All tests for commands that support global option --dry-run:
+#
+# - subvolume delete
+
+source "$TEST_TOP/common" || exit
+
+setup_root_helper
+setup_loopdevs 4
+prepare_loopdevs
+
+TEST_DEV=${loopdevs[1]}
+
+sleep 1
+
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f -d raid1 -m raid1 "${loopdevs[@]}"
+run_check_mount_test_dev
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv1"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv2"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv3"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv4"
+
+# Delete 2 without --dry-run
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume delete "$TEST_MNT/subv2"
+# Delete all with --dry-run
+run_check $SUDO_HELPER "$TOP/btrfs" --dry-run subvolume delete "$TEST_MNT/subv"*
+run_check $SUDO_HELPER "$TOP/btrfs" --dry-run subvolume delete --commit-after "$TEST_MNT/subv"*
+run_check $SUDO_HELPER "$TOP/btrfs" --dry-run subvolume delete --commit-each "$TEST_MNT/subv"*
+
+run_check $SUDO_HELPER ls -lid "$TEST_MNT/subv"*
+run_check $SUDO_HELPER stat "$TEST_MNT/subv1"
+run_mustfail "subv2 should not exist" $SUDO_HELPER stat "$TEST_MNT/subv2"
+run_check $SUDO_HELPER stat "$TEST_MNT/subv3"
+run_check $SUDO_HELPER stat "$TEST_MNT/subv4"
+run_check_umount_test_dev
+
+cleanup_loopdevs