nodelist: Make some functions mockable

Part of 33633.

src/feature/nodelist/nodelist.c

@@ -1074,8 +1074,8 @@ node_get_by_nickname,(const char *nickname, unsigned flags))
 
 /** Return the Ed25519 identity key for the provided node, or NULL if it
  * doesn't have one. */
-const ed25519_public_key_t *
-node_get_ed25519_id(const node_t *node)
+MOCK_IMPL(const ed25519_public_key_t *,
+node_get_ed25519_id,(const node_t *node))
 {
   const ed25519_public_key_t *ri_pk = NULL;
   const ed25519_public_key_t *md_pk = NULL;
@@ -1158,9 +1158,9 @@ node_get_protover_summary_flags(const node_t *node)
  * by ed25519 ID during the link handshake.  If <b>compatible_with_us</b>,
  * it needs to be using a link authentication method that we understand.
  * If not, any plausible link authentication method will do. */
-int
-node_supports_ed25519_link_authentication(const node_t *node,
-                                          int compatible_with_us)
+MOCK_IMPL(int,
+node_supports_ed25519_link_authentication,(const node_t *node,
+                                           int compatible_with_us))
 {
   if (! node_get_ed25519_id(node))
     return 0;

src/feature/nodelist/nodelist.h

@@ -70,11 +70,13 @@ const char *node_get_platform(const node_t *node);
 uint32_t node_get_prim_addr_ipv4h(const node_t *node);
 void node_get_address_string(const node_t *node, char *cp, size_t len);
 long node_get_declared_uptime(const node_t *node);
-const struct ed25519_public_key_t *node_get_ed25519_id(const node_t *node);
+MOCK_DECL(const struct ed25519_public_key_t *,node_get_ed25519_id,
+          (const node_t *node));
 int node_ed25519_id_matches(const node_t *node,
                             const struct ed25519_public_key_t *id);
-int node_supports_ed25519_link_authentication(const node_t *node,
-                                              int compatible_with_us);
+MOCK_DECL(int,node_supports_ed25519_link_authentication,
+          (const node_t *node,
+           int compatible_with_us));
 int node_supports_v3_hsdir(const node_t *node);
 int node_supports_ed25519_hs_intro(const node_t *node);
 int node_supports_v3_rendezvous_point(const node_t *node);