tdesktop/Telegram/SourceFiles/base/flat_map_tests.cpp

122 lines
2.8 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "catch.hpp"
#include "base/flat_map.h"
#include <string>
struct int_wrap {
int value;
};
struct int_wrap_comparator {
inline bool operator()(const int_wrap &a, const int_wrap &b) const {
return a.value < b.value;
}
};
using namespace std;
TEST_CASE("flat_maps should keep items sorted by key", "[flat_map]") {
base::flat_map<int, string> v;
v.emplace(0, "a");
v.emplace(5, "b");
v.emplace(4, "d");
v.emplace(2, "e");
auto checkSorted = [&] {
auto prev = v.begin();
REQUIRE(prev != v.end());
for (auto i = prev + 1; i != v.end(); prev = i, ++i) {
REQUIRE(prev->first < i->first);
}
};
REQUIRE(v.size() == 4);
checkSorted();
SECTION("adding item puts it in the right position") {
v.emplace(3, "c");
REQUIRE(v.size() == 5);
REQUIRE(v.find(3) != v.end());
checkSorted();
}
}
TEST_CASE("simple flat_maps tests", "[flat_map]") {
SECTION("copy constructor") {
base::flat_map<int, string> v;
v.emplace(0, "a");
v.emplace(2, "b");
auto u = v;
REQUIRE(u.size() == 2);
REQUIRE(u.find(0) == u.begin());
REQUIRE(u.find(2) == u.end() - 1);
}
SECTION("assignment") {
base::flat_map<int, string> v, u;
v.emplace(0, "a");
v.emplace(2, "b");
u = v;
REQUIRE(u.size() == 2);
REQUIRE(u.find(0) == u.begin());
REQUIRE(u.find(2) == u.end() - 1);
}
}
TEST_CASE("flat_maps custom comparator", "[flat_map]") {
base::flat_map<int_wrap, string, int_wrap_comparator> v;
v.emplace(int_wrap{ 0 }, "a");
v.emplace(int_wrap{ 5 }, "b");
v.emplace(int_wrap{ 4 }, "d");
v.emplace(int_wrap{ 2 }, "e");
auto checkSorted = [&] {
auto prev = v.begin();
REQUIRE(prev != v.end());
for (auto i = prev + 1; i != v.end(); prev = i, ++i) {
REQUIRE(int_wrap_comparator()(prev->first, i->first));
}
};
REQUIRE(v.size() == 4);
checkSorted();
SECTION("adding item puts it in the right position") {
v.emplace(int_wrap{ 3 }, "c");
REQUIRE(v.size() == 5);
REQUIRE(v.find({ 3 }) != v.end());
checkSorted();
}
}
TEST_CASE("flat_maps structured bindings", "[flat_map]") {
base::flat_map<int, std::unique_ptr<double>> v;
v.emplace(0, std::make_unique<double>(0.));
v.emplace(1, std::make_unique<double>(1.));
SECTION("structred binded range-based for loop") {
for (const auto &[key, value] : v) {
REQUIRE(key == int(std::round(*value)));
}
}
SECTION("non-const structured binded range-based for loop") {
base::flat_map<int, int> second = {
{ 1, 1 },
{ 2, 2 },
{ 2, 3 },
{ 3, 3 },
};
REQUIRE(second.size() == 3);
//for (auto [a, b] : second) { // #MSVC Bug, reported
// REQUIRE(a == b);
//}
for (const auto [a, b] : second) {
REQUIRE(a == b);
}
}
}