X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c6a24bce95a8c071c0e1131eecb5e7985e02970a..cff982bd049d26d7acbd0e23324e0de051b06d0d:/src/xbt/random_test.cpp diff --git a/src/xbt/random_test.cpp b/src/xbt/random_test.cpp index c35943ed01..e6179be5fe 100644 --- a/src/xbt/random_test.cpp +++ b/src/xbt/random_test.cpp @@ -1,4 +1,4 @@ -/* Copyright (c) 2019. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2019-2020. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ @@ -9,17 +9,18 @@ #include #include -#define EPSILON (100*std::numeric_limits::epsilon()) +#define EpsilonApprox(a) Catch::Matchers::WithinAbs((a), 100 * std::numeric_limits::epsilon()) 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(simgrid::xbt::random::exponential(25) == Approx(0.00291934351538427348).epsilon(EPSILON)); + REQUIRE_THAT(simgrid::xbt::random::exponential(25), EpsilonApprox(0.00291934351538427348)); REQUIRE(simgrid::xbt::random::uniform_int(1, 6) == 4); - REQUIRE(simgrid::xbt::random::uniform_real(0, 1) == Approx(0.31637556043369124970).epsilon(EPSILON)); - REQUIRE(simgrid::xbt::random::normal(0, 2) == Approx(1.62746784745133976635).epsilon(EPSILON)); + 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") @@ -27,17 +28,36 @@ TEST_CASE("xbt::random: Random Number Generation") std::mt19937 gen; gen.seed(12345); - simgrid::xbt::random::set_mersenne_seed(12345); simgrid::xbt::random::set_implem_std(); + simgrid::xbt::random::set_mersenne_seed(12345); 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) == Approx(distA(gen)).epsilon(EPSILON)); + REQUIRE_THAT(simgrid::xbt::random::exponential(25), EpsilonApprox(distA(gen))); REQUIRE(simgrid::xbt::random::uniform_int(1, 6) == distB(gen)); - REQUIRE(simgrid::xbt::random::uniform_real(0, 1) == Approx(distC(gen)).epsilon(EPSILON)); - REQUIRE(simgrid::xbt::random::normal(0, 2) == Approx(distD(gen)).epsilon(EPSILON)); + 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"); + } } }