btrfs-progs: tests: add test for missing device delete error value

Add a test which ensures the kernel returns the correct error value
when missing device removal is requested. This test verifies that kernel
refactoring didn't break the return value.

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

tests/misc-tests/011-delete-missing-device/test.sh

@@ -44,6 +44,22 @@ test_delete_missing()
 	run_check_umount_test_dev
 }
 
+test_missing_error()
+{
+	local out
+
+	run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
+	run_check_mount_test_dev
+	out=$(run_mustfail_stdout "device remove succeeded" \
+		$SUDO_HELPER "$TOP/btrfs" device remove missing "$TEST_MNT")
+
+	if ! echo "$out" | grep -q "no missing devices found to remove"; then
+		_fail "IOCTL returned unexpected error value"
+	fi
+
+	run_check_umount_test_dev
+}
+
 setup_loopdevs 4
 prepare_loopdevs
 dev1=${loopdevs[1]}
@@ -53,5 +69,6 @@ TEST_DEV=$dev1
 test_do_mkfs -m raid1 -d raid1
 test_wipefs
 test_delete_missing
+test_missing_error
 
 cleanup_loopdevs