✅ 通过黑盒测试
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#include <iostream>
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#include <chrono>
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#include <thread>
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#include <string>
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#include <optional>
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#include <functional>
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#include <vector>
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#include <utility>
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// 使用 C++20 的时间字面量
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using namespace std::chrono_literals;
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using namespace shufeng2012;
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#include "main/memdb.cpp"
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// ----- 简易测试框架 -----
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static int g_test_passed = 0;
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static int g_test_failed = 0;
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#define TEST(name) \
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void test_##name(); \
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struct TestReg_##name { \
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TestReg_##name() { register_test(#name, test_##name); } \
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} reg_##name; \
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void test_##name()
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using TestFunc = std::function<void()>;
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std::vector<std::pair<std::string, TestFunc>> tests;
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void register_test(const std::string& name, TestFunc fn) {
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tests.push_back({name, fn});
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}
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// 断言宏（支持 C++20 的 constexpr 字符串，但这里不变）
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#define EXPECT_TRUE(expr) \
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do { if (!(expr)) { std::cerr << " [FAIL] " #expr << " is false\n"; ++g_test_failed; return; } } while(0)
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#define EXPECT_FALSE(expr) EXPECT_TRUE(!(expr))
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#define EXPECT_EQ(expected, actual) \
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do { if ((expected) != (actual)) { std::cerr << " [FAIL] Expected: " << (expected) << ", Actual: " << (actual) << "\n"; ++g_test_failed; return; } } while(0)
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#define EXPECT_OPTIONAL_EQ(expected, opt) \
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do { \
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if (!(opt).has_value()) { std::cerr << " [FAIL] optional has no value\n"; ++g_test_failed; return; } \
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if ((expected) != (opt).value()) { std::cerr << " [FAIL] Expected: " << (expected) << ", Actual: " << (opt).value() << "\n"; ++g_test_failed; return; } \
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} while(0)
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#define EXPECT_NO_VALUE(opt) \
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do { if ((opt).has_value()) { std::cerr << " [FAIL] optional should have no value, but has: " << (opt).value() << "\n"; ++g_test_failed; return; } } while(0)
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// ----- 测试用例 -----
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// 1. 默认构造
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TEST(DefaultConstruction) {
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Memdb<int, std::string> db;
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EXPECT_EQ(0u, db.size());
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EXPECT_TRUE(db.get_db().empty());
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EXPECT_TRUE(db.get_keys().empty());
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EXPECT_TRUE(db.get_time_touch().empty());
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 2. 插入与查询
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TEST(InsertAndSearch) {
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Memdb<int, std::string> db(10);
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EXPECT_TRUE(db.insert(1, "one"));
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EXPECT_EQ(1u, db.size());
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auto opt = db.search(1);
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EXPECT_OPTIONAL_EQ("one", opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 3. 重复插入失败
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TEST(InsertDuplicateFails) {
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Memdb<int, std::string> db;
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EXPECT_TRUE(db.insert(1, "one"));
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EXPECT_FALSE(db.insert(1, "another"));
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EXPECT_EQ(1u, db.size());
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auto opt = db.search(1);
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EXPECT_OPTIONAL_EQ("one", opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 4. 查询不存在的键
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TEST(SearchNonExistent) {
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Memdb<int, std::string> db;
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auto opt = db.search(42);
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EXPECT_NO_VALUE(opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 5. 删除存在的键
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TEST(RemoveExisting) {
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Memdb<int, std::string> db;
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db.insert(1, "one");
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EXPECT_TRUE(db.remove(1));
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EXPECT_EQ(0u, db.size());
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auto opt = db.search(1);
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EXPECT_NO_VALUE(opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 6. 删除不存在的键
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TEST(RemoveNonExistentFails) {
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Memdb<int, std::string> db;
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EXPECT_FALSE(db.remove(99));
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EXPECT_EQ(0u, db.size());
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 7. 删除后重新插入
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TEST(RemoveThenReinsert) {
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Memdb<int, std::string> db;
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db.insert(1, "one");
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db.remove(1);
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EXPECT_TRUE(db.insert(1, "new"));
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EXPECT_EQ(1u, db.size());
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auto opt = db.search(1);
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EXPECT_OPTIONAL_EQ("new", opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 8. 更新（不触摸）
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TEST(UpdateWithoutTouch) {
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Memdb<int, std::string> db(10);
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db.insert(1, "one");
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EXPECT_TRUE(db.update(1, "updated", false));
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EXPECT_EQ(1u, db.size());
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auto opt = db.search(1);
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EXPECT_OPTIONAL_EQ("updated", opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 9. 更新（触摸）延长寿命 —— 使用 C++20 字面量
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TEST(UpdateWithTouchExtendsLifetime) {
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const int TTL = 3;
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Memdb<int, std::string> db(TTL);
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db.insert(1, "one");
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// 等待 1.5 秒（剩余寿命约 1.5 秒）
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std::this_thread::sleep_for(1500ms);
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// 触摸更新，重置寿命为从当前起 TTL 秒
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EXPECT_TRUE(db.update(1, "touched", true));
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// 再等待 2.5 秒（从触摸起 2.5 < TTL，应存活）
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std::this_thread::sleep_for(2500ms);
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db.search(999); // 触发 flush
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auto opt = db.search(1);
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EXPECT_TRUE(opt.has_value());
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EXPECT_OPTIONAL_EQ("touched", opt);
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EXPECT_EQ(1u, db.size());
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 10. 更新不存在的键
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TEST(UpdateNonExistentFails) {
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Memdb<int, std::string> db;
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EXPECT_FALSE(db.update(2, "nope"));
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EXPECT_EQ(0u, db.size());
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 11. 过期后自动清除
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TEST(ExpirationAfterTimeout) {
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const int TTL = 2;
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Memdb<int, std::string> db(TTL);
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db.insert(1, "expire");
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// 等待 TTL + 1 秒（保证超过）
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std::this_thread::sleep_for(std::chrono::seconds(TTL + 1));
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db.search(999); // 触发 flush
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EXPECT_EQ(0u, db.size());
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EXPECT_NO_VALUE(db.search(1));
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 12. 未过期前可查询
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TEST(NotExpiredBeforeTimeout) {
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const int TTL = 2;
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Memdb<int, std::string> db(TTL);
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db.insert(1, "alive");
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std::this_thread::sleep_for(1s);
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EXPECT_EQ(1u, db.size());
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auto opt = db.search(1);
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EXPECT_OPTIONAL_EQ("alive", opt);
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 13. 更新不触摸不延长寿命
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TEST(UpdateWithoutTouchDoesNotExtend) {
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const int TTL = 3;
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Memdb<int, std::string> db(TTL);
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db.insert(1, "one");
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// 等待 1.5 秒（剩余 1.5 秒）
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std::this_thread::sleep_for(1500ms);
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// 更新但不触摸，过期时间不变
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EXPECT_TRUE(db.update(1, "updated", false));
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// 再等待 2 秒（总休眠 3.5 > TTL，应过期）
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std::this_thread::sleep_for(2000ms);
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db.search(999);
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EXPECT_EQ(0u, db.size());
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EXPECT_NO_VALUE(db.search(1));
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 14. 生存时间为 0，立即过期
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TEST(ZeroLifetimeExpiresImmediately) {
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Memdb<int, std::string> db(0);
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db.insert(1, "zero");
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std::this_thread::sleep_for(10ms);
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db.search(999);
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EXPECT_EQ(0u, db.size());
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EXPECT_NO_VALUE(db.search(1));
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 15. 混合操作一致性
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TEST(MixedInsertDeleteSize) {
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Memdb<int, std::string> db;
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db.insert(1, "a");
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db.insert(2, "b");
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db.insert(3, "c");
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db.remove(2);
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db.insert(4, "d");
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EXPECT_EQ(3u, db.size());
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EXPECT_TRUE(db.search(1).has_value());
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EXPECT_FALSE(db.search(2).has_value());
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EXPECT_TRUE(db.search(3).has_value());
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EXPECT_TRUE(db.search(4).has_value());
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// 16. 批量过期
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TEST(BulkExpirationClearsSize) {
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const int TTL = 1;
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Memdb<int, std::string> db(TTL);
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for (int i = 0; i < 100; ++i) {
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db.insert(i, std::to_string(i));
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}
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EXPECT_EQ(100u, db.size());
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std::this_thread::sleep_for(std::chrono::seconds(TTL + 1));
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db.search(-1);
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EXPECT_EQ(0u, db.size());
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for (int i = 0; i < 100; ++i) {
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EXPECT_FALSE(db.search(i).has_value());
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}
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std::cout << " [PASS]\n";
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++g_test_passed;
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}
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// ----- 程序入口 -----
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int main() {
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std::cout << "Memdb Black-box Tests (C++20, no external libs)\n";
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std::cout << "================================================\n";
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for (auto& [name, fn] : tests) {
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std::cout << "Test: " << name << "\n";
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fn();
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}
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std::cout << "================================================\n";
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std::cout << "Passed: " << g_test_passed << ", Failed: " << g_test_failed << "\n";
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return g_test_failed > 0 ? 1 : 0;
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}
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