tests: shell: Add test for flush bug on sets with size

This tests for a bug where elements can't be added after flushing a
full set with the flag NFTNL_SET_DESC_SIZE set.

Signed-off-by: Elise Lennion <elise.lennion@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/sets/0017add_after_flush_0 b/tests/shell/testcases/sets/0017add_after_flush_0
new file mode 100755 (executable)
index 0000000..0390b03
--- /dev/null
+++ b/tests/shell/testcases/sets/0017add_after_flush_0
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# This tests for a bug where elements can't be added after flushing a
+# full set with the flag NFTNL_SET_DESC_SIZE set
+
+set -e
+$NFT add table x
+$NFT add set x s {type ipv4_addr\; size 2\;}
+$NFT add element x s {1.1.1.1}
+$NFT add element x s {1.1.1.2}
+$NFT flush set x s
+$NFT add element x s {1.1.1.1}