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// Copyright 2022 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/container/internal/common_policy_traits.h"
#include <functional>
#include <memory>
#include <type_traits>
#include <utility>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/base/config.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace container_internal {
namespace {
using ::testing::MockFunction;
using ::testing::AnyNumber;
using ::testing::ReturnRef;
using Slot = int;
struct PolicyWithoutOptionalOps {
using slot_type = Slot;
using key_type = Slot;
using init_type = Slot;
static std::function<void(void*, Slot*, Slot)> construct;
static std::function<void(void*, Slot*)> destroy;
static std::function<Slot&(Slot*)> element;
};
std::function<void(void*, Slot*, Slot)> PolicyWithoutOptionalOps::construct;
std::function<void(void*, Slot*)> PolicyWithoutOptionalOps::destroy;
std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::element;
struct PolicyWithOptionalOps : PolicyWithoutOptionalOps {
static std::function<void(void*, Slot*, Slot*)> transfer;
};
std::function<void(void*, Slot*, Slot*)> PolicyWithOptionalOps::transfer;
struct PolicyWithMemcpyTransfer : PolicyWithoutOptionalOps {
static std::function<std::true_type(void*, Slot*, Slot*)> transfer;
};
std::function<std::true_type(void*, Slot*, Slot*)>
PolicyWithMemcpyTransfer::transfer;
struct Test : ::testing::Test {
Test() {
PolicyWithoutOptionalOps::construct = [&](void* a1, Slot* a2, Slot a3) {
construct.Call(a1, a2, std::move(a3));
};
PolicyWithoutOptionalOps::destroy = [&](void* a1, Slot* a2) {
destroy.Call(a1, a2);
};
PolicyWithoutOptionalOps::element = [&](Slot* a1) -> Slot& {
return element.Call(a1);
};
PolicyWithOptionalOps::transfer = [&](void* a1, Slot* a2, Slot* a3) {
return transfer.Call(a1, a2, a3);
};
}
std::allocator<Slot> alloc;
int a = 53;
MockFunction<void(void*, Slot*, Slot)> construct;
MockFunction<void(void*, Slot*)> destroy;
MockFunction<Slot&(Slot*)> element;
MockFunction<void(void*, Slot*, Slot*)> transfer;
};
TEST_F(Test, construct) {
EXPECT_CALL(construct, Call(&alloc, &a, 53));
common_policy_traits<PolicyWithoutOptionalOps>::construct(&alloc, &a, 53);
}
TEST_F(Test, destroy) {
EXPECT_CALL(destroy, Call(&alloc, &a));
common_policy_traits<PolicyWithoutOptionalOps>::destroy(&alloc, &a);
}
TEST_F(Test, element) {
int b = 0;
EXPECT_CALL(element, Call(&a)).WillOnce(ReturnRef(b));
EXPECT_EQ(&b, &common_policy_traits<PolicyWithoutOptionalOps>::element(&a));
}
TEST_F(Test, without_transfer) {
int b = 42;
EXPECT_CALL(element, Call(&a)).Times(AnyNumber()).WillOnce(ReturnRef(a));
EXPECT_CALL(element, Call(&b)).WillOnce(ReturnRef(b));
EXPECT_CALL(construct, Call(&alloc, &a, b)).Times(AnyNumber());
EXPECT_CALL(destroy, Call(&alloc, &b)).Times(AnyNumber());
common_policy_traits<PolicyWithoutOptionalOps>::transfer(&alloc, &a, &b);
}
TEST_F(Test, with_transfer) {
int b = 42;
EXPECT_CALL(transfer, Call(&alloc, &a, &b));
common_policy_traits<PolicyWithOptionalOps>::transfer(&alloc, &a, &b);
}
TEST(TransferUsesMemcpy, Basic) {
EXPECT_FALSE(
common_policy_traits<PolicyWithOptionalOps>::transfer_uses_memcpy());
EXPECT_TRUE(
common_policy_traits<PolicyWithMemcpyTransfer>::transfer_uses_memcpy());
}
} // namespace
} // namespace container_internal
ABSL_NAMESPACE_END
} // namespace absl
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