Export of internal Abseil changes.

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4eacae3ff1b14b1d309e8092185bc10e8a6203cf by Derek Mauro <dmauro@google.com>:

Release SwissTable - a fast, efficient, cache-friendly hash table.

https://www.youtube.com/watch?v=ncHmEUmJZf4

PiperOrigin-RevId: 214816527

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df8c3dfab3cfb2f4365909a84d0683b193cfbb11 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 214785288

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1eabd5266bbcebc33eecc91e5309b751856a75c8 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 214722931

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2ebbfac950f83146b46253038e7dd7dcde9f2951 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 214701684
GitOrigin-RevId: 4eacae3ff1b14b1d309e8092185bc10e8a6203cf
Change-Id: I9ba64e395b22ad7863213d157b8019b082adc19d

1 files changed, 88 insertions, 0 deletions

diff --git a/absl/container/internal/unordered_set_lookup_test.h b/absl/container/internal/unordered_set_lookup_test.h
new file mode 100644
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+++ b/absl/container/internal/unordered_set_lookup_test.h
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+// Copyright 2018 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
+//
+//      http://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.
+
+#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_
+#define ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/container/internal/hash_generator_testing.h"
+#include "absl/container/internal/hash_policy_testing.h"
+
+namespace absl {
+namespace container_internal {
+
+template <class UnordSet>
+class LookupTest : public ::testing::Test {};
+
+TYPED_TEST_CASE_P(LookupTest);
+
+TYPED_TEST_P(LookupTest, Count) {
+  using T = hash_internal::GeneratedType<TypeParam>;
+  std::vector<T> values;
+  std::generate_n(std::back_inserter(values), 10,
+                  hash_internal::Generator<T>());
+  TypeParam m;
+  for (const auto& v : values)
+    EXPECT_EQ(0, m.count(v)) << ::testing::PrintToString(v);
+  m.insert(values.begin(), values.end());
+  for (const auto& v : values)
+    EXPECT_EQ(1, m.count(v)) << ::testing::PrintToString(v);
+}
+
+TYPED_TEST_P(LookupTest, Find) {
+  using T = hash_internal::GeneratedType<TypeParam>;
+  std::vector<T> values;
+  std::generate_n(std::back_inserter(values), 10,
+                  hash_internal::Generator<T>());
+  TypeParam m;
+  for (const auto& v : values)
+    EXPECT_TRUE(m.end() == m.find(v)) << ::testing::PrintToString(v);
+  m.insert(values.begin(), values.end());
+  for (const auto& v : values) {
+    typename TypeParam::iterator it = m.find(v);
+    static_assert(std::is_same<const typename TypeParam::value_type&,
+                               decltype(*it)>::value,
+                  "");
+    static_assert(std::is_same<const typename TypeParam::value_type*,
+                               decltype(it.operator->())>::value,
+                  "");
+    EXPECT_TRUE(m.end() != it) << ::testing::PrintToString(v);
+    EXPECT_EQ(v, *it) << ::testing::PrintToString(v);
+  }
+}
+
+TYPED_TEST_P(LookupTest, EqualRange) {
+  using T = hash_internal::GeneratedType<TypeParam>;
+  std::vector<T> values;
+  std::generate_n(std::back_inserter(values), 10,
+                  hash_internal::Generator<T>());
+  TypeParam m;
+  for (const auto& v : values) {
+    auto r = m.equal_range(v);
+    ASSERT_EQ(0, std::distance(r.first, r.second));
+  }
+  m.insert(values.begin(), values.end());
+  for (const auto& v : values) {
+    auto r = m.equal_range(v);
+    ASSERT_EQ(1, std::distance(r.first, r.second));
+    EXPECT_EQ(v, *r.first);
+  }
+}
+
+REGISTER_TYPED_TEST_CASE_P(LookupTest, Count, Find, EqualRange);
+
+}  // namespace container_internal
+}  // namespace absl
+#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_