gtest

提供两种判断的宏 EXPECT_XXX()（推荐使用）  ASSERT_XXX()（出错直接 crash）

分组测试

#include <gtest/gtest.h>

int Factorial(int n) {
  int result = 1;
  for (int i = 1; i <= n; i++) {
    result *= i;
  }
  return result;
}
int add(int a, int b) { return a + b; }

/**
 * 下面三个 TEST 都是属于同一个 test suite，即 FactorialTest
 * (期待值，真实值)
 */
// 正数为一组
TEST(FactorialTest, Positive) {
  // TEST 函数中类似普通函数，可定义变量
  EXPECT_EQ(1, Factorial(1));
  EXPECT_EQ(2, Factorial(2));
  EXPECT_EQ(6, Factorial(3));
  EXPECT_EQ(40320, Factorial(8));
}
// 负数为一组
TEST(FactorialTest, Negative) {
  EXPECT_EQ(1, Factorial(-5));
  EXPECT_EQ(1, Factorial(-1));
  EXPECT_GT(Factorial(-10), 0);
}

/**
 * 另一组测试
*/
TEST(AddTest, 01) {
  EXPECT_EQ(3, add(1, 2));
  EXPECT_LT(3, add(2, 2));
}

int main(int argc, char* argcv[]) {
  testing::InitGoogleTest(&argc, argcv);
  return RUN_ALL_TESTS();
}

SetUP TearDown

#include <gtest/gtest.h>

#include <iostream>
#include <queue>

class QueueTest : public testing::Test {
 public:
  std::queue<int> q;
  virtual void SetUp() override {
    std::cout << "before a case" << std::endl;
    q.push(1);
    q.push(2);
  }
  virtual void TearDown() override { std::cout << "after a case" << std::endl; }

  static void SetUpTestCase() { std::cout << "before all case" << std::endl; }
  static void TearDownTestCase() { std::cout << "after all case" << std::endl; }
};

TEST_F(QueueTest, TestSize) {
  EXPECT_EQ(2, q.size());
  q.pop();
  EXPECT_EQ(1, q.size());
}
TEST_F(QueueTest, TestEmpty) {
  EXPECT_FALSE(q.empty());
}

int main(int argc, char* argcv[]) {
  testing::InitGoogleTest(&argc, argcv);
  return RUN_ALL_TESTS();
}