test: prepare complete channel fixtures for private delivery

tests/test_dm_group_routes.c

@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "utun_instance.h"
+#include "config_updater.h"
 #include "chat/chat_core.h"
 #include "chat/member_sync.h"
 #include "dm/dm_core.h"
@@ -59,7 +60,8 @@ static int member(unsigned node, unsigned group, unsigned peer, const char* fiel
 }
 
 static void observed(struct ETCP_CONN* conn, struct ll_entry* entry) {
-    if (entry->len >= sizeof(struct SVC_ROUTE_HDR) && entry->dgram[ROUTER_SVC_ID_OFF] == ETCP_RT_ID_DM_MAILBOX) f.observed++;
+    if (entry->len >= sizeof(struct SVC_ROUTE_HDR) && entry->dgram[offsetof(struct SVC_ROUTE_HDR, svc_id)] == ETCP_RT_ID_DM_MAILBOX)
+        f.observed++;
     f.receiver(conn, entry);
 }
 
@@ -127,7 +129,8 @@ static int setup(void) {
                 REQUIRE(test_member_seed(inst, channel, node->my_keys.public_key, node->my_ed25519_pubkey,
                     node->my_ed25519_privkey, owner->my_ed25519_privkey, "{}", tags, tag_signature) >= 0);
             }
-            f.group[local][g] = topo_groups_create_group(inst->topo_groups, 101 + g, TOPO_GROUP_TYPE_CHAT, channel);
+            REQUIRE(!chat_core_ensure_channel_ready(inst, channel));
+            f.group[local][g] = topo_groups_find(inst->topo_groups, 101 + g);
             REQUIRE(f.group[local][g]);
         }
     }