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-rw-r--r--src/test/random_tests.cpp43
1 files changed, 42 insertions, 1 deletions
diff --git a/src/test/random_tests.cpp b/src/test/random_tests.cpp
index d2c46c0daa..132e190051 100644
--- a/src/test/random_tests.cpp
+++ b/src/test/random_tests.cpp
@@ -15,5 +15,46 @@ BOOST_AUTO_TEST_CASE(osrandom_tests)
BOOST_CHECK(Random_SanityCheck());
}
-BOOST_AUTO_TEST_SUITE_END()
+BOOST_AUTO_TEST_CASE(fastrandom_tests)
+{
+ // Check that deterministic FastRandomContexts are deterministic
+ FastRandomContext ctx1(true);
+ FastRandomContext ctx2(true);
+
+ BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
+ BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
+ BOOST_CHECK_EQUAL(ctx1.rand64(), ctx2.rand64());
+ BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));
+ BOOST_CHECK(ctx1.randbytes(17) == ctx2.randbytes(17));
+ BOOST_CHECK(ctx1.rand256() == ctx2.rand256());
+ BOOST_CHECK_EQUAL(ctx1.randbits(7), ctx2.randbits(7));
+ BOOST_CHECK(ctx1.randbytes(128) == ctx2.randbytes(128));
+ BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
+ BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));
+ BOOST_CHECK(ctx1.rand256() == ctx2.rand256());
+ BOOST_CHECK(ctx1.randbytes(50) == ctx2.randbytes(50));
+
+ // Check that a nondeterministic ones are not
+ FastRandomContext ctx3;
+ FastRandomContext ctx4;
+ BOOST_CHECK(ctx3.rand64() != ctx4.rand64()); // extremely unlikely to be equal
+ BOOST_CHECK(ctx3.rand256() != ctx4.rand256());
+ BOOST_CHECK(ctx3.randbytes(7) != ctx4.randbytes(7));
+}
+BOOST_AUTO_TEST_CASE(fastrandom_randbits)
+{
+ FastRandomContext ctx1;
+ FastRandomContext ctx2;
+ for (int bits = 0; bits < 63; ++bits) {
+ for (int j = 0; j < 1000; ++j) {
+ uint64_t rangebits = ctx1.randbits(bits);
+ BOOST_CHECK_EQUAL(rangebits >> bits, 0);
+ uint64_t range = ((uint64_t)1) << bits | rangebits;
+ uint64_t rand = ctx2.randrange(range);
+ BOOST_CHECK(rand < range);
+ }
+ }
+}
+
+BOOST_AUTO_TEST_SUITE_END()