From cd575396c49692e82417b0fa5501f186ce10bc10 Mon Sep 17 00:00:00 2001
From: Steve Bronder <sbronder@flatironinstitute.org>
Date: Thu, 16 May 2024 16:42:11 -0400
Subject: [PATCH] add test

---
 src/test/unit/services/util/create_rng_test.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/test/unit/services/util/create_rng_test.cpp b/src/test/unit/services/util/create_rng_test.cpp
index 5dee9c8656a..050e2b83d14 100644
--- a/src/test/unit/services/util/create_rng_test.cpp
+++ b/src/test/unit/services/util/create_rng_test.cpp
@@ -28,3 +28,12 @@ TEST(rng, initialize_with_zero) {
   rng2();
   EXPECT_NE(rng1, rng2);
 }
+
+TEST(rng, run_twice_with_minus_one_seed) {
+  stan::rng_t rng1 = stan::services::util::create_rng(-1, 0);
+  EXPECT_EQ(rng1(), rng1());
+}
+TEST(rng, run_twice_with_zero_seed) {
+  stan::rng_t rng1 = stan::services::util::create_rng(0, 0);
+  EXPECT_NE(rng1(), rng1());
+}