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| author | Pieter Wuille <[email protected]> | 2017-02-25 12:16:58 -0800 |
|---|---|---|
| committer | Pieter Wuille <[email protected]> | 2017-03-29 11:26:08 -0700 |
| commit | 4fd2d2fc97e21efceab849576e544160fd5e3e3d (patch) | |
| tree | 4d36745b0b5a72bf51b2e54bfd13151920a2c57b /src/test/random_tests.cpp | |
| parent | Switch FastRandomContext to ChaCha20 (diff) | |
| download | discoin-4fd2d2fc97e21efceab849576e544160fd5e3e3d.tar.xz discoin-4fd2d2fc97e21efceab849576e544160fd5e3e3d.zip | |
Add a FastRandomContext::randrange and use it
Diffstat (limited to 'src/test/random_tests.cpp')
| -rw-r--r-- | src/test/random_tests.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/random_tests.cpp b/src/test/random_tests.cpp index 31b993cd3..859673422 100644 --- a/src/test/random_tests.cpp +++ b/src/test/random_tests.cpp @@ -35,4 +35,19 @@ BOOST_AUTO_TEST_CASE(fastrandom_tests) BOOST_CHECK(ctx3.rand64() != ctx4.rand64()); // extremely unlikely to be equal } +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() |