Cpp Testing

// tests/add_test.cpp#include <gtest/gtest.h>
int Add(int a, int b); // Provided by production code.
TEST(AddTest, AddsTwoNumbers) { // RED  EXPECT_EQ(Add(2, 3), 5);}
// src/add.cppint Add(int a, int b) { // GREEN  return a + b;}
// REFACTOR: simplify/rename once tests pass

// tests/calculator_test.cpp#include <gtest/gtest.h>
int Add(int a, int b); // Provided by production code.
TEST(CalculatorTest, AddsTwoNumbers) {    EXPECT_EQ(Add(2, 3), 5);}

// tests/user_store_test.cpp// Pseudocode stub: replace UserStore/User with project types.#include <gtest/gtest.h>#include <memory>#include <optional>#include <string>
struct User { std::string name; };class UserStore {public:    explicit UserStore(std::string /*path*/) {}    void Seed(std::initializer_list<User> /*users*/) {}    std::optional<User> Find(const std::string &/*name*/) { return User{"alice"}; }};
class UserStoreTest : public ::testing::Test {protected:    void SetUp() override {        store = std::make_unique<UserStore>(":memory:");        store->Seed({{"alice"}, {"bob"}});    }
    std::unique_ptr<UserStore> store;};
TEST_F(UserStoreTest, FindsExistingUser) {    auto user = store->Find("alice");    ASSERT_TRUE(user.has_value());    EXPECT_EQ(user->name, "alice");}

// tests/notifier_test.cpp#include <gmock/gmock.h>#include <gtest/gtest.h>#include <string>
class Notifier {public:    virtual ~Notifier() = default;    virtual void Send(const std::string &message) = 0;};
class MockNotifier : public Notifier {public:    MOCK_METHOD(void, Send, (const std::string &message), (override));};
class Service {public:    explicit Service(Notifier &notifier) : notifier_(notifier) {}    void Publish(const std::string &message) { notifier_.Send(message); }
private:    Notifier &notifier_;};
TEST(ServiceTest, SendsNotifications) {    MockNotifier notifier;    Service service(notifier);
    EXPECT_CALL(notifier, Send("hello")).Times(1);    service.Publish("hello");}

#include <cstddef>#include <cstdint>#include <string>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {    std::string input(reinterpret_cast<const char *>(data), size);    // ParseConfig(input); // project function    return 0;}