A second test case for dns_resolve_impl.

src/or/router.c

@@ -1714,8 +1714,8 @@ router_compare_to_my_exit_policy(const tor_addr_t *addr, uint16_t port)
 
 /** Return true iff my exit policy is reject *:*.  Return -1 if we don't
  * have a descriptor */
-int
-router_my_exit_policy_is_reject_star(void)
+MOCK_IMPL(int,
+router_my_exit_policy_is_reject_star,(void))
 {
   if (!router_get_my_routerinfo()) /* make sure desc_routerinfo exists */
     return -1;

src/or/router.h

@@ -80,7 +80,7 @@ void check_descriptor_ipaddress_changed(time_t now);
 void router_new_address_suggestion(const char *suggestion,
                                    const dir_connection_t *d_conn);
 int router_compare_to_my_exit_policy(const tor_addr_t *addr, uint16_t port);
-int router_my_exit_policy_is_reject_star(void);
+MOCK_DECL(int, router_my_exit_policy_is_reject_star,(void));
 MOCK_DECL(const routerinfo_t *, router_get_my_routerinfo, (void));
 extrainfo_t *router_get_my_extrainfo(void);
 const char *router_get_my_descriptor(void);

src/test/test_dns.c

@@ -5,6 +5,7 @@
 
 #include "dns.h"
 #include "connection.h"
+#include "router.h"
 
 #define NS_MODULE dns
 
@@ -382,12 +383,38 @@ NS(test_main)(void *arg)
 
 #define NS_SUBMODULE ASPECT(resolve_impl, non_exit)
 
+/** Given that Tor instance is not configured as an exit node, we want
+ * dns_resolve_impl() to fail with return value -1.
+ */
+static int
+NS(router_my_exit_policy_is_reject_star)(void)
+{
+  return 1;
+}
+
 static void
 NS(test_main)(void *arg)
 {
-  tt_skip();
+  int retval;
+  int made_pending;
+
+  edge_connection_t *exitconn = create_valid_exitconn();
+  or_circuit_t *on_circ = tor_malloc_zero(sizeof(or_circuit_t));
+
+  TO_CONN(exitconn)->address = tor_strdup("torproject.org"); 
+
+  NS_MOCK(router_my_exit_policy_is_reject_star);
+
+  retval = dns_resolve_impl(exitconn, 1, on_circ, NULL, &made_pending,
+                            NULL);
+
+  tt_int_op(retval,==,-1);
 
   done:
+  tor_free(TO_CONN(exitconn)->address);
+  tor_free(exitconn);
+  tor_free(on_circ);
+  NS_UNMOCK(router_my_exit_policy_is_reject_star);
   return;
 }