Adding unit tests for the standard library distributions

diff --git a/src/xbt/random_test.cpp b/src/xbt/random_test.cpp
index faffe9d..958b04c 100644 (file)
--- a/src/xbt/random_test.cpp
+++ b/src/xbt/random_test.cpp
@@ -6,10 +6,11 @@
 #include "src/include/catch.hpp"
 #include "xbt/log.h"
 #include "xbt/random.hpp"
+#include <random>
 
 TEST_CASE("xbt::random: Random Number Generation")
 {
-  SECTION("Random")
+  SECTION("Using XBT_RNG_xbt")
   {
     simgrid::xbt::random::set_mersenne_seed(12345);
 
@@ -18,4 +19,23 @@ TEST_CASE("xbt::random: Random Number Generation")
     REQUIRE(simgrid::xbt::random::uniform_real(0, 1) == 0.31637556043369124970);
     REQUIRE(simgrid::xbt::random::normal(0, 2) == 1.62746784745133976635);
   }
+
+  SECTION("Using XBT_RNG_std")
+  {
+    std::mt19937 gen;
+    gen.seed(12345);
+
+    simgrid::xbt::random::set_mersenne_seed(12345);
+    simgrid::xbt::random::use_std();
+
+    std::exponential_distribution<> distA(25);
+    std::uniform_int_distribution<> distB(1, 6);
+    std::uniform_real_distribution<> distC(0, 1);
+    std::normal_distribution<> distD(0, 2);
+
+    REQUIRE(simgrid::xbt::random::exponential(25) == distA(gen));
+    REQUIRE(simgrid::xbt::random::uniform_int(1, 6) == distB(gen));
+    REQUIRE(simgrid::xbt::random::uniform_real(0, 1) == distC(gen));
+    REQUIRE(simgrid::xbt::random::normal(0, 2) == distD(gen));
+  }
 }