X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c408a68c414742fabbfb0187089d54b5c495c016..cff982bd049d26d7acbd0e23324e0de051b06d0d:/src/xbt/random_test.cpp

diff --git a/src/xbt/random_test.cpp b/src/xbt/random_test.cpp
index 60c52a4531..e6179be5fe 100644
--- a/src/xbt/random_test.cpp
+++ b/src/xbt/random_test.cpp
@@ -15,11 +15,12 @@ TEST_CASE("xbt::random: Random Number Generation")
 {
   SECTION("Using XBT_RNG_xbt")
   {
+    simgrid::xbt::random::set_implem_xbt();
     simgrid::xbt::random::set_mersenne_seed(12345);
-    REQUIRE_THAT(simgrid::xbt::random::exponential(25), EpsilonApprox(0.00291934352469749815));
+    REQUIRE_THAT(simgrid::xbt::random::exponential(25), EpsilonApprox(0.00291934351538427348));
     REQUIRE(simgrid::xbt::random::uniform_int(1, 6) == 4);
-    REQUIRE_THAT(simgrid::xbt::random::uniform_real(0, 1), EpsilonApprox(0.31637556036002933979));
-    REQUIRE_THAT(simgrid::xbt::random::normal(0, 2), EpsilonApprox(1.62746784853777226587));
+    REQUIRE_THAT(simgrid::xbt::random::uniform_real(0, 1), EpsilonApprox(0.31637556043369124970));
+    REQUIRE_THAT(simgrid::xbt::random::normal(0, 2), EpsilonApprox(1.62746784745133976635));
   }
 
   SECTION("Using XBT_RNG_std")
@@ -40,4 +41,23 @@ TEST_CASE("xbt::random: Random Number Generation")
     REQUIRE_THAT(simgrid::xbt::random::uniform_real(0, 1), EpsilonApprox(distC(gen)));
     REQUIRE_THAT(simgrid::xbt::random::normal(0, 2), EpsilonApprox(distD(gen)));
   }
+
+  SECTION("XBT_RNG_std write to a file")
+  {
+    simgrid::xbt::random::set_implem_std();
+    simgrid::xbt::random::set_mersenne_seed(12345);
+
+    simgrid::xbt::random::exponential(25);
+    bool writtenA = simgrid::xbt::random::write_mersenne_state("rdm_state_tmp.txt");
+    double resB = simgrid::xbt::random::uniform_real(10, 20);
+    double resC = simgrid::xbt::random::normal(0, 2);
+    bool writtenB = simgrid::xbt::random::read_mersenne_state("rdm_state_tmp.txt");
+    REQUIRE(writtenA);
+    REQUIRE(writtenB);
+    REQUIRE_THAT(simgrid::xbt::random::uniform_real(10, 20), EpsilonApprox(resB));
+    REQUIRE_THAT(simgrid::xbt::random::normal(0, 2), EpsilonApprox(resC));
+    if (writtenB) {
+      std::remove("rdm_state_tmp.txt");
+    }
+  }
 }