1 files changed, 45 insertions, 0 deletions
diff --git a/projects/SelfTest/IntrospectiveTests/RandomNumberGeneration.tests.cpp b/projects/SelfTest/IntrospectiveTests/RandomNumberGeneration.tests.cpp
new file mode 100644
index 00000000..f8085dbf
--- /dev/null
+++ b/projects/SelfTest/IntrospectiveTests/RandomNumberGeneration.tests.cpp
@@ -0,0 +1,45 @@
+/*
+ *  Created by Martin on 06/10/2019.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+#include "catch.hpp"
+
+#include "internal/catch_random_number_generator.h"
+
+TEST_CASE("Our PCG implementation provides expected results for known seeds", "[rng]") {
+    Catch::SimplePcg32 rng;
+    SECTION("Default seeded") {
+        REQUIRE(rng() == 0xfcdb943b);
+        REQUIRE(rng() == 0x6f55b921);
+        REQUIRE(rng() == 0x4c17a916);
+        REQUIRE(rng() == 0x71eae25f);
+        REQUIRE(rng() == 0x6ce7909c);
+    }
+    SECTION("Specific seed") {
+        rng.seed(0xabcd1234);
+        REQUIRE(rng() == 0x57c08495);
+        REQUIRE(rng() == 0x33c956ac);
+        REQUIRE(rng() == 0x2206fd76);
+        REQUIRE(rng() == 0x3501a35b);
+        REQUIRE(rng() == 0xfdffb30f);
+
+        // Also check repeated output after reseeding
+        rng.seed(0xabcd1234);
+        REQUIRE(rng() == 0x57c08495);
+        REQUIRE(rng() == 0x33c956ac);
+        REQUIRE(rng() == 0x2206fd76);
+        REQUIRE(rng() == 0x3501a35b);
+        REQUIRE(rng() == 0xfdffb30f);
+    }
+}
+
+TEST_CASE("Comparison ops", "[rng]") {
+    using Catch::SimplePcg32;
+    REQUIRE(SimplePcg32{} == SimplePcg32{});
+    REQUIRE(SimplePcg32{ 0 } != SimplePcg32{});
+    REQUIRE_FALSE(SimplePcg32{ 1 } == SimplePcg32{ 2 });
+    REQUIRE_FALSE(SimplePcg32{ 1 } != SimplePcg32{ 1 });
+}