1 files changed, 0 insertions, 259 deletions
diff --git a/third_party/abseil_cpp/absl/random/uniform_int_distribution_test.cc b/third_party/abseil_cpp/absl/random/uniform_int_distribution_test.cc
deleted file mode 100644
index 276d72ad20..0000000000
--- a/third_party/abseil_cpp/absl/random/uniform_int_distribution_test.cc
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/uniform_int_distribution.h"
-
-#include <cmath>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#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"
-
-namespace {
-
-template <typename IntType>
-class UniformIntDistributionTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t,
-                                  uint32_t, int64_t, uint64_t>;
-TYPED_TEST_SUITE(UniformIntDistributionTest, IntTypes);
-
-TYPED_TEST(UniformIntDistributionTest, ParamSerializeTest) {
-  // This test essentially ensures that the parameters serialize,
-  // not that the values generated cover the full range.
-  using Limits = std::numeric_limits<TypeParam>;
-  using param_type =
-      typename absl::uniform_int_distribution<TypeParam>::param_type;
-  const TypeParam kMin = std::is_unsigned<TypeParam>::value ? 37 : -105;
-  const TypeParam kNegOneOrZero = std::is_unsigned<TypeParam>::value ? 0 : -1;
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const auto& param : {
-           param_type(),
-           param_type(2, 2),  // Same
-           param_type(9, 32),
-           param_type(kMin, 115),
-           param_type(kNegOneOrZero, Limits::max()),
-           param_type(Limits::min(), Limits::max()),
-           param_type(Limits::lowest(), Limits::max()),
-           param_type(Limits::min() + 1, Limits::max() - 1),
-       }) {
-    const auto a = param.a();
-    const auto b = param.b();
-    absl::uniform_int_distribution<TypeParam> before(a, b);
-    EXPECT_EQ(before.a(), param.a());
-    EXPECT_EQ(before.b(), param.b());
-
-    {
-      // Initialize via param_type
-      absl::uniform_int_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-    }
-
-    // Initialize via iostreams
-    std::stringstream ss;
-    ss << before;
-
-    absl::uniform_int_distribution<TypeParam> after(Limits::min() + 3,
-                                                    Limits::max() - 5);
-
-    EXPECT_NE(before.a(), after.a());
-    EXPECT_NE(before.b(), after.b());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.a(), after.a());
-    EXPECT_EQ(before.b(), after.b());
-    EXPECT_EQ(before.param(), after.param());
-    EXPECT_EQ(before, after);
-
-    // Smoke test.
-    auto sample_min = after.max();
-    auto sample_max = after.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = after(gen);
-      EXPECT_GE(sample, after.min());
-      EXPECT_LE(sample, after.max());
-      if (sample > sample_max) {
-        sample_max = sample;
-      }
-      if (sample < sample_min) {
-        sample_min = sample;
-      }
-    }
-    std::string msg = absl::StrCat("Range: ", +sample_min, ", ", +sample_max);
-    ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-  }
-}
-
-TYPED_TEST(UniformIntDistributionTest, ViolatesPreconditionsDeathTest) {
-#if GTEST_HAS_DEATH_TEST
-  // Hi < Lo
-  EXPECT_DEBUG_DEATH({ absl::uniform_int_distribution<TypeParam> dist(10, 1); },
-                     "");
-#endif  // GTEST_HAS_DEATH_TEST
-#if defined(NDEBUG)
-  // opt-mode, for invalid parameters, will generate a garbage value,
-  // but should not enter an infinite loop.
-  absl::InsecureBitGen gen;
-  absl::uniform_int_distribution<TypeParam> dist(10, 1);
-  auto x = dist(gen);
-
-  // Any value will generate a non-empty string.
-  EXPECT_FALSE(absl::StrCat(+x).empty()) << x;
-#endif  // NDEBUG
-}
-
-TYPED_TEST(UniformIntDistributionTest, TestMoments) {
-  constexpr int kSize = 100000;
-  using Limits = std::numeric_limits<TypeParam>;
-  using param_type =
-      typename absl::uniform_int_distribution<TypeParam>::param_type;
-
-  // 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)}) {
-    absl::uniform_int_distribution<TypeParam> dist(param);
-    for (int i = 0; i < kSize; i++) {
-      const auto sample = dist(rng);
-      ASSERT_LE(dist.param().a(), sample);
-      ASSERT_GE(dist.param().b(), sample);
-      values[i] = sample;
-    }
-
-    auto moments = absl::random_internal::ComputeDistributionMoments(values);
-    const double a = dist.param().a();
-    const double b = dist.param().b();
-    const double n = (b - a + 1);
-    const double mean = (a + b) / 2;
-    const double var = ((b - a + 1) * (b - a + 1) - 1) / 12;
-    const double kurtosis = 3 - 6 * (n * n + 1) / (5 * (n * n - 1));
-
-    // TODO(ahh): this is not the right bound
-    // empirically validated with --runs_per_test=10000.
-    EXPECT_NEAR(mean, moments.mean, 0.01 * var);
-    EXPECT_NEAR(var, moments.variance, 0.015 * var);
-    EXPECT_NEAR(0.0, moments.skewness, 0.025);
-    EXPECT_NEAR(kurtosis, moments.kurtosis, 0.02 * kurtosis);
-  }
-}
-
-TYPED_TEST(UniformIntDistributionTest, ChiSquaredTest50) {
-  using absl::random_internal::kChiSquared;
-
-  constexpr size_t kTrials = 1000;
-  constexpr int kBuckets = 50;  // inclusive, so actally +1
-  constexpr double kExpected =
-      static_cast<double>(kTrials) / static_cast<double>(kBuckets);
-
-  // Empirically validated with --runs_per_test=10000.
-  const int kThreshold =
-      absl::random_internal::ChiSquareValue(kBuckets, 0.999999);
-
-  const TypeParam min = std::is_unsigned<TypeParam>::value ? 37 : -37;
-  const TypeParam max = min + kBuckets;
-
-  // 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);
-  for (size_t i = 0; i < kTrials; i++) {
-    auto x = dist(rng);
-    counts[x - min]++;
-  }
-  double chi_square = absl::random_internal::ChiSquareWithExpected(
-      std::begin(counts), std::end(counts), kExpected);
-  if (chi_square > kThreshold) {
-    double p_value =
-        absl::random_internal::ChiSquarePValue(chi_square, kBuckets);
-
-    // Chi-squared test failed. Output does not appear to be uniform.
-    std::string msg;
-    for (const auto& a : counts) {
-      absl::StrAppend(&msg, a, "\n");
-    }
-    absl::StrAppend(&msg, kChiSquared, " p-value ", p_value, "\n");
-    absl::StrAppend(&msg, "High ", kChiSquared, " value: ", chi_square, " > ",
-                    kThreshold);
-    ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-    FAIL() << msg;
-  }
-}
-
-TEST(UniformIntDistributionTest, StabilityTest) {
-  // absl::uniform_int_distribution stability relies only on integer operations.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(12);
-
-  {
-    absl::uniform_int_distribution<int32_t> dist(0, 4);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(4, 4, 3, 2, 1, 0, 1, 4, 3, 1, 3, 1));
-
-  {
-    urbg.reset();
-    absl::uniform_int_distribution<int32_t> dist(0, 100);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(97, 86, 75, 41, 36, 16, 38, 92, 67,
-                                           30, 80, 38));
-
-  {
-    urbg.reset();
-    absl::uniform_int_distribution<int32_t> dist(0, 10000);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(9648, 8562, 7439, 4089, 3571, 1602,
-                                           3813, 9195, 6641, 2986, 7956, 3765));
-}
-
-}  // namespace