Avoid the use of rand() in tests.

We control the random functions in crypto_core, so we can make them
deterministic more easily. This will help test reproducibility in the
future.

1 files changed, 5 insertions, 4 deletions

diff --git a/auto_tests/tox_many_tcp_test.c b/auto_tests/tox_many_tcp_test.c
index 6c3f2350..34b01d16 100644
--- a/auto_tests/tox_many_tcp_test.c
+++ b/auto_tests/tox_many_tcp_test.c
@@ -15,6 +15,7 @@
 #include <stdlib.h>
 #include <time.h>
 
+#include "../toxcore/crypto_core.h"
 #include "../toxcore/tox.h"
 #include "../toxcore/util.h"
 
@@ -84,8 +85,8 @@ START_TEST(test_many_clients_tcp)
 
     for (i = 0; i < NUM_FRIENDS; ++i) {
 loop_top:
-        pairs[i].tox1 = rand() % NUM_TOXES_TCP;
-        pairs[i].tox2 = (pairs[i].tox1 + rand() % (NUM_TOXES_TCP - 1) + 1) % NUM_TOXES_TCP;
+        pairs[i].tox1 = random_u32() % NUM_TOXES_TCP;
+        pairs[i].tox2 = (pairs[i].tox1 + random_u32() % (NUM_TOXES_TCP - 1) + 1) % NUM_TOXES_TCP;
 
         for (j = 0; j < i; ++j) {
             if (pairs[j].tox2 == pairs[i].tox1 && pairs[j].tox1 == pairs[i].tox2) {
@@ -178,8 +179,8 @@ START_TEST(test_many_clients_tcp_b)
 
     for (i = 0; i < NUM_FRIENDS; ++i) {
 loop_top:
-        pairs[i].tox1 = rand() % NUM_TOXES_TCP;
-        pairs[i].tox2 = (pairs[i].tox1 + rand() % (NUM_TOXES_TCP - 1) + 1) % NUM_TOXES_TCP;
+        pairs[i].tox1 = random_u32() % NUM_TOXES_TCP;
+        pairs[i].tox2 = (pairs[i].tox1 + random_u32() % (NUM_TOXES_TCP - 1) + 1) % NUM_TOXES_TCP;
 
         for (j = 0; j < i; ++j) {
             if (pairs[j].tox2 == pairs[i].tox1 && pairs[j].tox1 == pairs[i].tox2) {