diff options
Diffstat (limited to 'absl/random/uniform_int_distribution_test.cc')
| -rw-r--r-- | absl/random/uniform_int_distribution_test.cc | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/absl/random/uniform_int_distribution_test.cc b/absl/random/uniform_int_distribution_test.cc index 6953760320eb..276d72ad2045 100644 --- a/absl/random/uniform_int_distribution_test.cc +++ b/absl/random/uniform_int_distribution_test.cc @@ -26,6 +26,7 @@ #include "absl/base/internal/raw_logging.h" #include "absl/random/internal/chi_square.h" #include "absl/random/internal/distribution_test_util.h" +#include "absl/random/internal/pcg_engine.h" #include "absl/random/internal/sequence_urbg.h" #include "absl/random/random.h" #include "absl/strings/str_cat.h" @@ -134,7 +135,11 @@ TYPED_TEST(UniformIntDistributionTest, TestMoments) { using param_type = typename absl::uniform_int_distribution<TypeParam>::param_type; - absl::InsecureBitGen rng; + // We use a fixed bit generator for distribution accuracy tests. This allows + // these tests to be deterministic, while still testing the qualify of the + // implementation. + absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6}; + std::vector<double> values(kSize); for (const auto& param : {param_type(0, Limits::max()), param_type(13, 127)}) { @@ -178,7 +183,11 @@ TYPED_TEST(UniformIntDistributionTest, ChiSquaredTest50) { const TypeParam min = std::is_unsigned<TypeParam>::value ? 37 : -37; const TypeParam max = min + kBuckets; - absl::InsecureBitGen rng; + // We use a fixed bit generator for distribution accuracy tests. This allows + // these tests to be deterministic, while still testing the qualify of the + // implementation. + absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6}; + absl::uniform_int_distribution<TypeParam> dist(min, max); std::vector<int32_t> counts(kBuckets + 1, 0); |