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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/containers/flat_map.h"
#include <string>
#include <vector>
#include "base/containers/container_test_utils.h"
#include "base/macros.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
// A flat_map is basically a interface to flat_tree. So several basic
// operations are tested to make sure things are set up properly, but the bulk
// of the tests are in flat_tree_unittests.cc.
using ::testing::ElementsAre;
namespace base {
TEST(FlatMap, IncompleteType) {
struct A {
using Map = flat_map<A, A>;
int data;
Map set_with_incomplete_type;
Map::iterator it;
Map::const_iterator cit;
// We do not declare operator< because clang complains that it's unused.
};
A a;
}
TEST(FlatMap, RangeConstructor) {
flat_map<int, int>::value_type input_vals[] = {
{1, 1}, {1, 2}, {1, 3}, {2, 1}, {2, 2}, {2, 3}, {3, 1}, {3, 2}, {3, 3}};
flat_map<int, int> first(std::begin(input_vals), std::end(input_vals),
KEEP_FIRST_OF_DUPES);
EXPECT_THAT(first, ElementsAre(std::make_pair(1, 1), std::make_pair(2, 1),
std::make_pair(3, 1)));
flat_map<int, int> last(std::begin(input_vals), std::end(input_vals),
KEEP_LAST_OF_DUPES);
EXPECT_THAT(last, ElementsAre(std::make_pair(1, 3), std::make_pair(2, 3),
std::make_pair(3, 3)));
}
TEST(FlatMap, MoveConstructor) {
using pair = std::pair<MoveOnlyInt, MoveOnlyInt>;
flat_map<MoveOnlyInt, MoveOnlyInt> original;
original.insert(pair(MoveOnlyInt(1), MoveOnlyInt(1)));
original.insert(pair(MoveOnlyInt(2), MoveOnlyInt(2)));
original.insert(pair(MoveOnlyInt(3), MoveOnlyInt(3)));
original.insert(pair(MoveOnlyInt(4), MoveOnlyInt(4)));
flat_map<MoveOnlyInt, MoveOnlyInt> moved(std::move(original));
EXPECT_EQ(1U, moved.count(MoveOnlyInt(1)));
EXPECT_EQ(1U, moved.count(MoveOnlyInt(2)));
EXPECT_EQ(1U, moved.count(MoveOnlyInt(3)));
EXPECT_EQ(1U, moved.count(MoveOnlyInt(4)));
}
TEST(FlatMap, VectorConstructor) {
using IntPair = std::pair<int, int>;
using IntMap = flat_map<int, int>;
{
std::vector<IntPair> vect{{1, 1}, {1, 2}, {2, 1}};
IntMap map(std::move(vect), KEEP_FIRST_OF_DUPES);
EXPECT_THAT(map, ElementsAre(IntPair(1, 1), IntPair(2, 1)));
}
{
std::vector<IntPair> vect{{1, 1}, {1, 2}, {2, 1}};
IntMap map(std::move(vect), KEEP_LAST_OF_DUPES);
EXPECT_THAT(map, ElementsAre(IntPair(1, 2), IntPair(2, 1)));
}
}
TEST(FlatMap, InitializerListConstructor) {
{
flat_map<int, int> cont(
{{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}, {1, 2}, {10, 10}, {8, 8}},
KEEP_FIRST_OF_DUPES);
EXPECT_THAT(cont, ElementsAre(std::make_pair(1, 1), std::make_pair(2, 2),
std::make_pair(3, 3), std::make_pair(4, 4),
std::make_pair(5, 5), std::make_pair(8, 8),
std::make_pair(10, 10)));
}
{
flat_map<int, int> cont(
{{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}, {1, 2}, {10, 10}, {8, 8}},
KEEP_LAST_OF_DUPES);
EXPECT_THAT(cont, ElementsAre(std::make_pair(1, 2), std::make_pair(2, 2),
std::make_pair(3, 3), std::make_pair(4, 4),
std::make_pair(5, 5), std::make_pair(8, 8),
std::make_pair(10, 10)));
}
}
TEST(FlatMap, InsertFindSize) {
base::flat_map<int, int> s;
s.insert(std::make_pair(1, 1));
s.insert(std::make_pair(1, 1));
s.insert(std::make_pair(2, 2));
EXPECT_EQ(2u, s.size());
EXPECT_EQ(std::make_pair(1, 1), *s.find(1));
EXPECT_EQ(std::make_pair(2, 2), *s.find(2));
EXPECT_EQ(s.end(), s.find(7));
}
TEST(FlatMap, CopySwap) {
base::flat_map<int, int> original;
original.insert({1, 1});
original.insert({2, 2});
EXPECT_THAT(original,
ElementsAre(std::make_pair(1, 1), std::make_pair(2, 2)));
base::flat_map<int, int> copy(original);
EXPECT_THAT(copy, ElementsAre(std::make_pair(1, 1), std::make_pair(2, 2)));
copy.erase(copy.begin());
copy.insert({10, 10});
EXPECT_THAT(copy, ElementsAre(std::make_pair(2, 2), std::make_pair(10, 10)));
original.swap(copy);
EXPECT_THAT(original,
ElementsAre(std::make_pair(2, 2), std::make_pair(10, 10)));
EXPECT_THAT(copy, ElementsAre(std::make_pair(1, 1), std::make_pair(2, 2)));
}
// operator[](const Key&)
TEST(FlatMap, SubscriptConstKey) {
base::flat_map<std::string, int> m;
// Default construct elements that don't exist yet.
int& s = m["a"];
EXPECT_EQ(0, s);
EXPECT_EQ(1u, m.size());
// The returned mapped reference should refer into the map.
s = 22;
EXPECT_EQ(22, m["a"]);
// Overwrite existing elements.
m["a"] = 44;
EXPECT_EQ(44, m["a"]);
}
// operator[](Key&&)
TEST(FlatMap, SubscriptMoveOnlyKey) {
base::flat_map<MoveOnlyInt, int> m;
// Default construct elements that don't exist yet.
int& s = m[MoveOnlyInt(1)];
EXPECT_EQ(0, s);
EXPECT_EQ(1u, m.size());
// The returned mapped reference should refer into the map.
s = 22;
EXPECT_EQ(22, m[MoveOnlyInt(1)]);
// Overwrite existing elements.
m[MoveOnlyInt(1)] = 44;
EXPECT_EQ(44, m[MoveOnlyInt(1)]);
}
} // namespace base
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