support/testing: include init script in iptables test

Check a save/start/stop cycle based on the rules created by direct
commands in the pre-existing test.

Signed-off-by: Fiona Klute (WIWA) <fiona.klute@gmx.de>
Signed-off-by: Julien Olivain <ju.o@free.fr>

support/testing/tests/package/test_iptables.py

@@ -11,6 +11,7 @@ class TestIptables(infra.basetest.BRTest):
         """
         BR2_aarch64=y
         BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_INIT_BUSYBOX=y
         BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
         BR2_LINUX_KERNEL=y
         BR2_LINUX_KERNEL_CUSTOM_VERSION=y
@@ -70,9 +71,26 @@ class TestIptables(infra.basetest.BRTest):
         _, exit_code = self.emulator.run(ping_test_cmd)
         self.assertNotEqual(exit_code, 0)
 
+        # Save the current rules to test the init script later.
+        self.assertRunOk("/etc/init.d/S35iptables save")
+
         # We delete our only rule #1 in the INPUT chain.
         self.assertRunOk("iptables --delete INPUT 1")
 
         # Since we deleted the rule, the ping test command which was
         # supposed to fail earlier is now supposed to succeed.
         self.assertRunOk(ping_test_cmd)
+
+        # Load the rules as saved before.
+        self.assertRunOk("/etc/init.d/S35iptables start")
+
+        # Ping to 127.0.0.2 is expected to fail again.
+        _, exit_code = self.emulator.run(ping_test_cmd)
+        self.assertNotEqual(exit_code, 0)
+
+        # And flush the rules again.
+        self.assertRunOk("/etc/init.d/S35iptables stop")
+
+        # Since we deleted the rule, the ping test command which was
+        # supposed to fail earlier is now supposed to succeed.
+        self.assertRunOk(ping_test_cmd)