1 files changed, 33 insertions, 0 deletions
diff --git a/fluent-bit/tests/internal/random.c b/fluent-bit/tests/internal/random.c
new file mode 100644
index 000000000..236eaa575
--- /dev/null
+++ b/fluent-bit/tests/internal/random.c
@@ -0,0 +1,33 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+#include <fluent-bit/flb_random.h>
+
+#include "flb_tests_internal.h"
+
+void test_random_bytes()
+{
+    int ret;
+    unsigned char buf1[64] = {0};
+    unsigned char buf2[64] = {0};
+
+    /* The following tests check whether:
+     *
+     * (1) the random generator fills the buffer with numbers at all.
+     * (2) a successive call generates different numbers.
+     *
+     * These tests are probabilistic by nature; If we assume an ideal random
+     * generator, they are expected to fail once in 2^192 (= 10^57) runs.
+     */
+    ret = flb_random_bytes(buf1, 64);
+    TEST_CHECK(ret == 0);
+    TEST_CHECK(memcmp(buf1, buf2, 64) != 0);
+
+    ret = flb_random_bytes(buf2, 64);
+    TEST_CHECK(ret == 0);
+    TEST_CHECK(memcmp(buf1, buf2, 64) != 0);
+}
+
+TEST_LIST = {
+    {"random_bytes", test_random_bytes},
+    { 0 }
+};