tests/shell: use generated ruleset for `nft --check`

The command `nft [-j] list ruleset | nft [-j] --check -f -` should never
fail. "test-wrapper.sh" already checks for that.

However, previously, we would run check against the .nft/.json-nft
files. In most cases, the generated ruleset and the files in git are
identical. However, when they are not, we (also) want to run the check
against the generated one.

This means, we can also run this check every time, regardless whether a
.nft/.json-nft file exists.

If the .nft/.json-nft file is different from the generated one, (because
a test was skipped or because there is a bug), then also check those
files. But this time, any output is ignored as failures are expected
to happen. We still run the check, to get additional coverage for
valgrind or santizers.

Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 26 insertions, 22 deletions

diff --git a/tests/shell/helpers/test-wrapper.sh b/tests/shell/helpers/test-wrapper.sh
index 4ffc4818..f0170d76 100755
--- a/tests/shell/helpers/test-wrapper.sh
+++ b/tests/shell/helpers/test-wrapper.sh
@@ -222,36 +222,40 @@ if [ "$rc" = 1 -o -s "$NFT_TEST_TESTTMPDIR/chkdump" ] ; then
 	show_file "$NFT_TEST_TESTTMPDIR/chkdump" "Command \`$NFT flush ruleset\` failed" >> "$NFT_TEST_TESTTMPDIR/rc-failed-chkdump"
 	rc_chkdump=1
 fi
-# For the dumpfiles, call `nft --check` to possibly cover new code paths.
-if [ -f "$DUMPFILE" ] ; then
-	if [ "$rc_test" -eq 77 ] ; then
-		# The test was skipped. Possibly we don't have the required
-		# features to process this file. Ignore any output and exit
-		# code, but still call the program (for valgrind or sanitizer
-		# issue we hope to find).
-		$NFT --check -f "$DUMPFILE" &>/dev/null || :
+# Check that `nft [-j] list ruleset | nft [-j] --check -f -` works.
+fail=n
+$NFT --check -f "$NFT_TEST_TESTTMPDIR/ruleset-after" &> "$NFT_TEST_TESTTMPDIR/chkdump" || fail=y
+test -s "$NFT_TEST_TESTTMPDIR/chkdump" && fail=y
+if [ "$fail" = y ] ; then
+	show_file "$NFT_TEST_TESTTMPDIR/chkdump" "Command \`$NFT --check -f \"$NFT_TEST_TESTTMPDIR/ruleset-after\"\` failed" >> "$NFT_TEST_TESTTMPDIR/rc-failed-chkdump"
+	rc_chkdump=1
+fi
+if [ -f "$DUMPFILE" ] && ! cmp "$DUMPFILE" "$NFT_TEST_TESTTMPDIR/ruleset-after" &>/dev/null ; then
+	# Also check the $DUMPFILE to hit possibly new code paths. This
+	# is useful to see crashes and with ASAN/valgrind.
+	$NFT --check -f "$DUMPFILE" &>/dev/null || :
+fi
+if [ "$NFT_TEST_HAVE_json" != n ] ; then
+	if [ ! -f "$JDUMPFILE" ] ; then
+		# Optimally, `nft -j list ruleset | nft -j --check -f -` never
+		# fails.  However, there are known issues where this doesn't
+		# work, and we cannot assert hard against that. It's those
+		# tests that don't have a .json-nft file.
+		#
+		# This should be fixed, every test should have a .json-nft
+		# file, and this workaround removed.
+		$NFT -j --check -f "$NFT_TEST_TESTTMPDIR/ruleset-after.json" &>/dev/null || :
 	else
 		fail=n
-		$NFT --check -f "$DUMPFILE" &> "$NFT_TEST_TESTTMPDIR/chkdump" || fail=y
+		$NFT -j --check -f "$NFT_TEST_TESTTMPDIR/ruleset-after.json" &> "$NFT_TEST_TESTTMPDIR/chkdump" || fail=y
 		test -s "$NFT_TEST_TESTTMPDIR/chkdump" && fail=y
 		if [ "$fail" = y ] ; then
-			show_file "$NFT_TEST_TESTTMPDIR/chkdump" "Command \`$NFT --check -f \"$DUMPFILE\"\` failed" >> "$NFT_TEST_TESTTMPDIR/rc-failed-chkdump"
+			show_file "$NFT_TEST_TESTTMPDIR/chkdump" "Command \`$NFT -j --check -f \"$NFT_TEST_TESTTMPDIR/ruleset-after.json\"\` failed" >> "$NFT_TEST_TESTTMPDIR/rc-failed-chkdump"
 			rc_chkdump=1
 		fi
-		rm -f "$NFT_TEST_TESTTMPDIR/chkdump"
 	fi
-fi
-if [ "$NFT_TEST_HAVE_json" != n -a -f "$JDUMPFILE" ] ; then
-	if [ "$rc_test" -eq 77 ] ; then
+	if [ -f "$JDUMPFILE" ] && ! cmp "$JDUMPFILE" "$NFT_TEST_TESTTMPDIR/ruleset-after.json" &>/dev/null ; then
 		$NFT -j --check -f "$JDUMPFILE" &>/dev/null || :
-	else
-		fail=n
-		$NFT -j --check -f "$JDUMPFILE" &> "$NFT_TEST_TESTTMPDIR/chkdump" || fail=y
-		test -s "$NFT_TEST_TESTTMPDIR/chkdump" && fail=y
-		if [ "$fail" = y ] ; then
-			show_file "$NFT_TEST_TESTTMPDIR/chkdump" "Command \`$NFT -j --check -f \"$JDUMPFILE\"\` failed" >> "$NFT_TEST_TESTTMPDIR/rc-failed-chkdump"
-			rc_chkdump=1
-		fi
 	fi
 fi
 rm -f "$NFT_TEST_TESTTMPDIR/chkdump"