tests/py: Support testing JSON input and output as well

This extends nft-test.py by optional JSON testing capabilities,
activated via '-j'/'--enable-json' parameter).

JSON testing happens for all rules which are supposed to work: After a
rule has been added and the existing tests (payload, ruleset listing
output) have been performed, basically the same test is done again using
a recorded JSON equivalent and (if necessary) a recorded listing output.

The code tries to ease new test case creation overhead by
auto-generating JSON equivalent input via listing the (non-JSON) rule in
JSON format. Also, differing netlink debug and listing output are stored
in *.got files to assist in analyzing/fixing failing test cases.

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

1 files changed, 92 insertions, 0 deletions

diff --git a/tests/py/ip6/icmpv6.t.json.output b/tests/py/ip6/icmpv6.t.json.output
new file mode 100644
index 00000000..17d8d95b
--- /dev/null
+++ b/tests/py/ip6/icmpv6.t.json.output
@@ -0,0 +1,92 @@
+# icmpv6 type mld-listener-reduction accept
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "type",
+                    "name": "icmpv6"
+                }
+            },
+            "right": "mld-listener-done"
+        }
+    },
+    {
+        "accept": null
+    }
+]
+
+# icmpv6 type {router-renumbering, mld-listener-done, time-exceeded, nd-router-solicit} accept
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "type",
+                    "name": "icmpv6"
+                }
+            },
+            "right": {
+                "set": [
+                    "time-exceeded",
+                    "mld-listener-done",
+                    "nd-router-solicit",
+                    "router-renumbering"
+                ]
+            }
+        }
+    },
+    {
+        "accept": null
+    }
+]
+
+# icmpv6 type {mld-listener-query, time-exceeded, nd-router-advert} accept
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "type",
+                    "name": "icmpv6"
+                }
+            },
+            "right": {
+                "set": [
+                    "time-exceeded",
+                    "mld-listener-query",
+                    "nd-router-advert"
+                ]
+            }
+        }
+    },
+    {
+        "accept": null
+    }
+]
+
+# icmpv6 type != {mld-listener-query, time-exceeded, nd-router-advert} accept
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "type",
+                    "name": "icmpv6"
+                }
+            },
+            "op": "!=",
+            "right": {
+                "set": [
+                    "time-exceeded",
+                    "mld-listener-query",
+                    "nd-router-advert"
+                ]
+            }
+        }
+    },
+    {
+        "accept": null
+    }
+]
+