Cpp Testing

TDD 工作流

遵循 RED → GREEN → REFACTOR 循环：

1. RED：编写一个捕获新行为的失败测试
2. GREEN：实现最小的更改以使其通过
3. REFACTOR：在测试保持通过的同时进行清理

// 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.cpp
int Add(int a, int b) { // GREEN
  return a + b;
}

// REFACTOR: simplify/rename once tests pass

代码示例

基础单元测试 (gtest)

// 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);
}

夹具 (gtest)

// 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 {