Add 'third_party/abseil_cpp/' from commit '768eb2ca2857342673fcd462792ce04b8bac3fa3' r/781

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54beb5796cd408fbe15d2d2da09ff37adf
git-subtree-split: 768eb2ca2857342673fcd462792ce04b8bac3fa3

1 files changed, 63 insertions, 0 deletions

diff --git a/third_party/abseil_cpp/absl/random/internal/randen_slow_test.cc b/third_party/abseil_cpp/absl/random/internal/randen_slow_test.cc
new file mode 100644
index 000000000000..4a5358370586
--- /dev/null
+++ b/third_party/abseil_cpp/absl/random/internal/randen_slow_test.cc
@@ -0,0 +1,63 @@
+// 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/internal/randen_slow.h"
+
+#include <cstring>
+
+#include "gtest/gtest.h"
+#include "absl/random/internal/randen_traits.h"
+
+namespace {
+
+using absl::random_internal::RandenSlow;
+using absl::random_internal::RandenTraits;
+
+// Local state parameters.
+constexpr size_t kSeedBytes =
+    RandenTraits::kStateBytes - RandenTraits::kCapacityBytes;
+constexpr size_t kStateSizeT = RandenTraits::kStateBytes / sizeof(uint64_t);
+constexpr size_t kSeedSizeT = kSeedBytes / sizeof(uint32_t);
+
+struct alignas(16) randen {
+  uint64_t state[kStateSizeT];
+  uint32_t seed[kSeedSizeT];
+};
+
+TEST(RandenSlowTest, Default) {
+  constexpr uint64_t kGolden[] = {
+      0x6c6534090ee6d3ee, 0x044e2b9b9d5333c6, 0xc3c14f134e433977,
+      0xdda9f47cd90410ee, 0x887bf3087fd8ca10, 0xf0b780f545c72912,
+      0x15dbb1d37696599f, 0x30ec63baff3c6d59, 0xb29f73606f7f20a6,
+      0x02808a316f49a54c, 0x3b8feaf9d5c8e50e, 0x9cbf605e3fd9de8a,
+      0xc970ae1a78183bbb, 0xd8b2ffd356301ed5, 0xf4b327fe0fc73c37,
+      0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d, 0xd5af05dd3eff9556,
+      0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c, 0x58d3575834956d42,
+      0xed1ef4c26b87b840, 0x8eef32a23e0b2df3, 0x497cabf3431154fc,
+      0x4e24370570029a8b, 0xd88b5749f090e5ea, 0xc651a582a970692f,
+      0x78fcec2cbb6342f5, 0x463cb745612f55db, 0x352ee4ad1816afe3,
+      0x026ff374c101da7e, 0x811ef0821c3de851,
+  };
+
+  alignas(16) randen d;
+  std::memset(d.state, 0, sizeof(d.state));
+  RandenSlow::Generate(RandenSlow::GetKeys(), d.state);
+
+  uint64_t* id = d.state;
+  for (const auto& elem : kGolden) {
+    EXPECT_EQ(elem, *id++);
+  }
+}
+
+}  // namespace