tests/shell: Add back named_interval_automerging_0

Change the test to expect no automerging since it was disabled recently.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/sets/0002named_interval_automerging_0 b/tests/shell/testcases/sets/0002named_interval_automerging_0
new file mode 100755 (executable)
index 0000000..6889863
--- /dev/null
+++ b/tests/shell/testcases/sets/0002named_interval_automerging_0
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# This testscase checks the automerging of adjacent intervals
+
+set -e
+
+$NFT add table t
+$NFT add set t s { type ipv4_addr \; flags interval \; }
+$NFT add element t s { 192.168.0.0/24, 192.168.1.0/24 }
+$NFT list ruleset | grep "192.168.0.0/23" >/dev/null || exit 0
+echo "E: automerging of adjacent intervals happened unexpectedly." >&2
+exit 1