tests: shell: set reference from variable definition

Allow to define variable using set reference, eg.

	define x = @z

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/nft-f/0022variables_0 b/tests/shell/testcases/nft-f/0022variables_0
new file mode 100755 (executable)
index 0000000..ee17a62
--- /dev/null
+++ b/tests/shell/testcases/nft-f/0022variables_0
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+
+RULESET="define test1 = @y
+
+table ip x {
+       set y {
+               type ipv4_addr
+               flags dynamic,timeout
+       }
+
+       chain z {
+               type filter hook input priority filter; policy accept;
+               add \$test1 { ip saddr }
+               update \$test1 { ip saddr timeout 30s }
+               ip saddr \$test1
+       }
+}"
+
+$NFT -f - <<< "$RULESET"