diff options
Diffstat (limited to 'absl/random/uniform_real_distribution_test.cc')
| -rw-r--r-- | absl/random/uniform_real_distribution_test.cc | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/absl/random/uniform_real_distribution_test.cc b/absl/random/uniform_real_distribution_test.cc index a56374a65b25..be107cdde467 100644 --- a/absl/random/uniform_real_distribution_test.cc +++ b/absl/random/uniform_real_distribution_test.cc @@ -27,6 +27,7 @@ #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" @@ -207,7 +208,11 @@ TYPED_TEST(UniformRealDistributionTest, TestMoments) { constexpr int kSize = 1000000; std::vector<double> values(kSize); - 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_real_distribution<TypeParam> dist; for (int i = 0; i < kSize; i++) { values[i] = dist(rng); @@ -237,7 +242,11 @@ TYPED_TEST(UniformRealDistributionTest, ChiSquaredTest50) { const int kThreshold = absl::random_internal::ChiSquareValue(kBuckets - 1, 0.999999); - 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}; + for (const auto& param : {param_type(0, 1), param_type(5, 12), param_type(-5, 13), param_type(-5, -2)}) { const double min_val = param.a(); |