tests: shell: Test input descriptors for included files

Before b14572f72aac ("erec: Fix input descriptors for included files"),
nft error message was pointing to wrong file. But after this commit it
points to right file.

This patch adds a new test for this commit.

Signed-off-by: Shyam Saini <mayhs11saini@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/include/0013input_descriptors_included_files_0 b/tests/shell/testcases/include/0013input_descriptors_included_files_0
new file mode 100755 (executable)
index 0000000..03de50b
--- /dev/null
+++ b/tests/shell/testcases/include/0013input_descriptors_included_files_0
@@ -0,0 +1,52 @@
+#!/bin/bash
+
+# This test the changes made in commit id "b14572f72aac".
+# When the commit was not applied, nft pointed to wrong files name.
+# As the commit only fixes the error messages and hence does not change the
+# return value so, we need to compare the "file name" in the error message
+# instead of return value of nft.
+
+
+tmpfile1=$(mktemp -p .)
+if [ ! -w $tmpfile1 ] ; then
+        echo "Failed to create tmp file" >&2
+        exit 0
+fi
+
+tmpfile2=$(mktemp -p .)
+if [ ! -w $tmpfile2 ] ; then
+        echo "Failed to create tmp file" >&2
+        exit 0
+fi
+
+tmpfile3=$(mktemp -p .)
+if [ ! -w $tmpfile3 ] ; then
+        echo "Failed to create tmp file" >&2
+        exit 0
+fi
+
+tmpfile4=$(mktemp -p .)
+if [ ! -w $tmpfile4 ]; then
+        echo "Failed to create tmp file" >&2
+        exit 0
+fi
+
+trap "rm -rf $tmpfile1 $tmpfile2 $tmpfile3 $tmpfile4" EXIT # cleanup if aborted
+
+RULESET1="include \"$tmpfile2\""
+RULESET2="include \"$tmpfile3\""
+RULESET3="add rule x y anything everything"                    # wrong nft syntax
+
+
+echo "$RULESET1" > $tmpfile1
+echo "$RULESET2" >> $tmpfile1
+echo "$RULESET3" > $tmpfile2
+
+$NFT -f $tmpfile1 2> $tmpfile4
+
+var=$(awk -F: '$4==" Error"{print $1;exit;}' $tmpfile4)
+
+if [ $var == "$tmpfile3" ]; then
+       echo "E: Test failed" >&2
+       exit 1
+fi