tvl-depot/absl/container/internal/unordered_map_modifiers_test.h
Abseil Team f0afae0d49 Export of internal Abseil changes
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0f6565955231dc74ebad62ef32a18c457afa2dc7 by Abseil Team <absl-team@google.com>:

Document guarantee that we do not move from rvalue arguments if no insertion happens with absl::raw_hash_map::try_emplace, as done with std::unordered_map::try_emplace.

PiperOrigin-RevId: 264430409

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292e6b9e08fa689e8400d7f2db94cbcab29d5889 by CJ Johnson <johnsoncj@google.com>:

Removes use of aligned_storage in FixedArray and InlinedVector in favor of aligned char buffers.

PiperOrigin-RevId: 264385559

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aa0b19ad11ae5702022feee0e2e6434cfb28c9e9 by Derek Mauro <dmauro@google.com>:

Make the unit tests for absl::any, absl::optional, and absl::variant
no-ops when these types are just aliases for the corresponding std::
types. We have no way to fix standard library implementation bugs, so
don't bother working around them.

Also disable the corresponding exception-safety tests as well when
exceptions are not enabled.

Fixes https://github.com/abseil/abseil-cpp/pull/360

PiperOrigin-RevId: 264382050

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65896a911f36481b89b4712c83b91c90a76b64e8 by Abseil Team <absl-team@google.com>:

Improve documentation on erase

PiperOrigin-RevId: 264381266
GitOrigin-RevId: 0f6565955231dc74ebad62ef32a18c457afa2dc7
Change-Id: I74b9bd2ddf84526014104f17e87de70bd3fe65fa
2019-08-20 15:59:49 -04:00

314 lines
11 KiB
C++

// 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
//
// 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.
#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_
#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_
#include <memory>
#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 UnordMap>
class ModifiersTest : public ::testing::Test {};
TYPED_TEST_SUITE_P(ModifiersTest);
TYPED_TEST_P(ModifiersTest, Clear) {
using T = hash_internal::GeneratedType<TypeParam>;
std::vector<T> values;
std::generate_n(std::back_inserter(values), 10,
hash_internal::Generator<T>());
TypeParam m(values.begin(), values.end());
ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
m.clear();
EXPECT_THAT(items(m), ::testing::UnorderedElementsAre());
EXPECT_TRUE(m.empty());
}
TYPED_TEST_P(ModifiersTest, Insert) {
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
auto p = m.insert(val);
EXPECT_TRUE(p.second);
EXPECT_EQ(val, *p.first);
T val2 = {val.first, hash_internal::Generator<V>()()};
p = m.insert(val2);
EXPECT_FALSE(p.second);
EXPECT_EQ(val, *p.first);
}
TYPED_TEST_P(ModifiersTest, InsertHint) {
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
auto it = m.insert(m.end(), val);
EXPECT_TRUE(it != m.end());
EXPECT_EQ(val, *it);
T val2 = {val.first, hash_internal::Generator<V>()()};
it = m.insert(it, val2);
EXPECT_TRUE(it != m.end());
EXPECT_EQ(val, *it);
}
TYPED_TEST_P(ModifiersTest, InsertRange) {
using T = hash_internal::GeneratedType<TypeParam>;
std::vector<T> values;
std::generate_n(std::back_inserter(values), 10,
hash_internal::Generator<T>());
TypeParam m;
m.insert(values.begin(), values.end());
ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
}
TYPED_TEST_P(ModifiersTest, InsertOrAssign) {
#ifdef UNORDERED_MAP_CXX17
using std::get;
using K = typename TypeParam::key_type;
using V = typename TypeParam::mapped_type;
K k = hash_internal::Generator<K>()();
V val = hash_internal::Generator<V>()();
TypeParam m;
auto p = m.insert_or_assign(k, val);
EXPECT_TRUE(p.second);
EXPECT_EQ(k, get<0>(*p.first));
EXPECT_EQ(val, get<1>(*p.first));
V val2 = hash_internal::Generator<V>()();
p = m.insert_or_assign(k, val2);
EXPECT_FALSE(p.second);
EXPECT_EQ(k, get<0>(*p.first));
EXPECT_EQ(val2, get<1>(*p.first));
#endif
}
TYPED_TEST_P(ModifiersTest, InsertOrAssignHint) {
#ifdef UNORDERED_MAP_CXX17
using std::get;
using K = typename TypeParam::key_type;
using V = typename TypeParam::mapped_type;
K k = hash_internal::Generator<K>()();
V val = hash_internal::Generator<V>()();
TypeParam m;
auto it = m.insert_or_assign(m.end(), k, val);
EXPECT_TRUE(it != m.end());
EXPECT_EQ(k, get<0>(*it));
EXPECT_EQ(val, get<1>(*it));
V val2 = hash_internal::Generator<V>()();
it = m.insert_or_assign(it, k, val2);
EXPECT_EQ(k, get<0>(*it));
EXPECT_EQ(val2, get<1>(*it));
#endif
}
TYPED_TEST_P(ModifiersTest, Emplace) {
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
// TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
// with test traits/policy.
auto p = m.emplace(val);
EXPECT_TRUE(p.second);
EXPECT_EQ(val, *p.first);
T val2 = {val.first, hash_internal::Generator<V>()()};
p = m.emplace(val2);
EXPECT_FALSE(p.second);
EXPECT_EQ(val, *p.first);
}
TYPED_TEST_P(ModifiersTest, EmplaceHint) {
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
// TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
// with test traits/policy.
auto it = m.emplace_hint(m.end(), val);
EXPECT_EQ(val, *it);
T val2 = {val.first, hash_internal::Generator<V>()()};
it = m.emplace_hint(it, val2);
EXPECT_EQ(val, *it);
}
TYPED_TEST_P(ModifiersTest, TryEmplace) {
#ifdef UNORDERED_MAP_CXX17
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
// TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
// with test traits/policy.
auto p = m.try_emplace(val.first, val.second);
EXPECT_TRUE(p.second);
EXPECT_EQ(val, *p.first);
T val2 = {val.first, hash_internal::Generator<V>()()};
p = m.try_emplace(val2.first, val2.second);
EXPECT_FALSE(p.second);
EXPECT_EQ(val, *p.first);
#endif
}
TYPED_TEST_P(ModifiersTest, TryEmplaceHint) {
#ifdef UNORDERED_MAP_CXX17
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
// TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
// with test traits/policy.
auto it = m.try_emplace(m.end(), val.first, val.second);
EXPECT_EQ(val, *it);
T val2 = {val.first, hash_internal::Generator<V>()()};
it = m.try_emplace(it, val2.first, val2.second);
EXPECT_EQ(val, *it);
#endif
}
template <class V>
using IfNotVoid = typename std::enable_if<!std::is_void<V>::value, V>::type;
// In openmap we chose not to return the iterator from erase because that's
// more expensive. As such we adapt erase to return an iterator here.
struct EraseFirst {
template <class Map>
auto operator()(Map* m, int) const
-> IfNotVoid<decltype(m->erase(m->begin()))> {
return m->erase(m->begin());
}
template <class Map>
typename Map::iterator operator()(Map* m, ...) const {
auto it = m->begin();
m->erase(it++);
return it;
}
};
TYPED_TEST_P(ModifiersTest, Erase) {
using T = hash_internal::GeneratedType<TypeParam>;
using std::get;
std::vector<T> values;
std::generate_n(std::back_inserter(values), 10,
hash_internal::Generator<T>());
TypeParam m(values.begin(), values.end());
ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
auto& first = *m.begin();
std::vector<T> values2;
for (const auto& val : values)
if (get<0>(val) != get<0>(first)) values2.push_back(val);
auto it = EraseFirst()(&m, 0);
ASSERT_TRUE(it != m.end());
EXPECT_EQ(1, std::count(values2.begin(), values2.end(), *it));
EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values2.begin(),
values2.end()));
}
TYPED_TEST_P(ModifiersTest, EraseRange) {
using T = hash_internal::GeneratedType<TypeParam>;
std::vector<T> values;
std::generate_n(std::back_inserter(values), 10,
hash_internal::Generator<T>());
TypeParam m(values.begin(), values.end());
ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
auto it = m.erase(m.begin(), m.end());
EXPECT_THAT(items(m), ::testing::UnorderedElementsAre());
EXPECT_TRUE(it == m.end());
}
TYPED_TEST_P(ModifiersTest, EraseKey) {
using T = hash_internal::GeneratedType<TypeParam>;
std::vector<T> values;
std::generate_n(std::back_inserter(values), 10,
hash_internal::Generator<T>());
TypeParam m(values.begin(), values.end());
ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
EXPECT_EQ(1, m.erase(values[0].first));
EXPECT_EQ(0, std::count(m.begin(), m.end(), values[0]));
EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values.begin() + 1,
values.end()));
}
TYPED_TEST_P(ModifiersTest, Swap) {
using T = hash_internal::GeneratedType<TypeParam>;
std::vector<T> v1;
std::vector<T> v2;
std::generate_n(std::back_inserter(v1), 5, hash_internal::Generator<T>());
std::generate_n(std::back_inserter(v2), 5, hash_internal::Generator<T>());
TypeParam m1(v1.begin(), v1.end());
TypeParam m2(v2.begin(), v2.end());
EXPECT_THAT(items(m1), ::testing::UnorderedElementsAreArray(v1));
EXPECT_THAT(items(m2), ::testing::UnorderedElementsAreArray(v2));
m1.swap(m2);
EXPECT_THAT(items(m1), ::testing::UnorderedElementsAreArray(v2));
EXPECT_THAT(items(m2), ::testing::UnorderedElementsAreArray(v1));
}
// TODO(alkis): Write tests for extract.
// TODO(alkis): Write tests for merge.
REGISTER_TYPED_TEST_CASE_P(ModifiersTest, Clear, Insert, InsertHint,
InsertRange, InsertOrAssign, InsertOrAssignHint,
Emplace, EmplaceHint, TryEmplace, TryEmplaceHint,
Erase, EraseRange, EraseKey, Swap);
template <typename Type>
struct is_unique_ptr : std::false_type {};
template <typename Type>
struct is_unique_ptr<std::unique_ptr<Type>> : std::true_type {};
template <class UnordMap>
class UniquePtrModifiersTest : public ::testing::Test {
protected:
UniquePtrModifiersTest() {
static_assert(is_unique_ptr<typename UnordMap::mapped_type>::value,
"UniquePtrModifiersTyest may only be called with a "
"std::unique_ptr value type.");
}
};
TYPED_TEST_SUITE_P(UniquePtrModifiersTest);
// Test that we do not move from rvalue arguments if an insertion does not
// happen.
TYPED_TEST_P(UniquePtrModifiersTest, TryEmplace) {
#ifdef UNORDERED_MAP_CXX17
using T = hash_internal::GeneratedType<TypeParam>;
using V = typename TypeParam::mapped_type;
T val = hash_internal::Generator<T>()();
TypeParam m;
auto p = m.try_emplace(val.first, std::move(val.second));
EXPECT_TRUE(p.second);
// A moved from std::unique_ptr is guaranteed to be nullptr.
EXPECT_EQ(val.second, nullptr);
T val2 = {val.first, hash_internal::Generator<V>()()};
p = m.try_emplace(val2.first, std::move(val2.second));
EXPECT_FALSE(p.second);
EXPECT_NE(val2.second, nullptr);
#endif
}
REGISTER_TYPED_TEST_SUITE_P(UniquePtrModifiersTest, TryEmplace);
} // namespace container_internal
} // namespace absl
#endif // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_