From 5942e985c6ac9b18090ec92b11aa8a586b6365c5 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 2 Jul 2021 13:54:45 -0400
Subject: Avoid use of rand()

---
 test/sorted_array_test.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

(limited to 'test/sorted_array_test.c')

diff --git a/test/sorted_array_test.c b/test/sorted_array_test.c
index 9256118..cc87619 100644
--- a/test/sorted_array_test.c
+++ b/test/sorted_array_test.c
@@ -14,6 +14,8 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include "test_data.h"
+
 #include "zix/common.h"
 #include "zix/sorted_array.h"
 
@@ -45,7 +47,7 @@ ith_elem(unsigned test_num, unsigned n_elems, unsigned i)
     return n_elems - i; // Decreasing (worse case)
   case 2:
   default:
-    return rand() % 100; // Random
+    return lcg64(seed + i) % 100u; // Pseudo-random
   }
 }
 
@@ -64,8 +66,6 @@ stress(unsigned test_num, unsigned n_elems)
   ZixSortedArray* t =
     zix_sorted_array_new(true, int_cmp, NULL, sizeof(intptr_t));
 
-  srand(seed);
-
   // Insert n_elems elements
   for (unsigned i = 0; i < n_elems; ++i) {
     r          = ith_elem(test_num, n_elems, i);
@@ -84,8 +84,6 @@ stress(unsigned test_num, unsigned n_elems)
     }
   }
 
-  srand(seed);
-
   // Search for all elements
   for (unsigned i = 0; i < n_elems; ++i) {
     r = ith_elem(test_num, n_elems, i);
@@ -103,8 +101,6 @@ stress(unsigned test_num, unsigned n_elems)
     }
   }
 
-  srand(seed);
-
   // Iterate over all elements
   unsigned i    = 0;
   intptr_t last = -1;
@@ -137,8 +133,6 @@ stress(unsigned test_num, unsigned n_elems)
     return test_fail();
   }
 
-  srand(seed);
-
   // Iterate over all elements by index
   last = -1;
   for (i = 0; i < zix_sorted_array_size(t); ++i) {
@@ -156,8 +150,6 @@ stress(unsigned test_num, unsigned n_elems)
     last = iter_data;
   }
 
-  srand(seed);
-
   // Delete all elements
   for (unsigned e = 0; e < n_elems; e++) {
     r = ith_elem(test_num, n_elems, e);
@@ -205,7 +197,8 @@ main(int argc, char** argv)
     return 1;
   }
 
-  printf("Running %u tests with %u elements (seed %u)\n", n_tests, n_elems, seed);
+  printf(
+    "Running %u tests with %u elements (seed %u)\n", n_tests, n_elems, seed);
 
   for (unsigned i = 0; i < n_tests; ++i) {
     printf(".");
-- 
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