CPP(c++) google gtest

Google的开源C++单元测试框架Google Test,简称gtest。

建议直接参考: https://www.cnblogs.com/coderzh/archive/2009/04/06/1426755.html

#include<gtest/gtest.h>
int Abs(int x)
{
     return x > 0 ? x : -x;
}
TEST(IsAbsTest,HandlerTrueReturn)
{
    ASSERT_TRUE(Abs(1) == 1) << "Abs(1)=1";  //ASSERT_TRUE期待结果是true,operator<<输出一些自定义的信息
    ASSERT_TRUE(Abs(-1) == 1) << "Abs(-1)=1";
    ASSERT_FALSE(Abs(-2) == -2);  //期待结果是false
    ASSERT_EQ(Abs(1),Abs(-1));
    ASSERT_NE(Abs(-1),0);
    ASSERT_LT(Abs(-1),2);
    ASSERT_GT(Abs(-1),0);
    ASSERT_LE(Abs(-1),2);
    ASSERT_GE(Abs(-1),0);
}

功能一:断言 简单理解为调节判断作用

TEST(TestSuiteName,TestCaseName)
{
    EXPECT_*(**);//  失败时,案例继续往下执行。
    ASSERT_*(**);//  失败时,直接在当前函数中返回,当前函数中ASSERT_*后面的语句将不会执行。
}

int _tmain(int argc, _TCHAR* argv[])
{
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}

功能二:事件机制

1)全局的,所有案例执行前后。
class FooEnvironment : public testing::Environment
{
public:
    virtual void SetUp()  // SetUp()方法在所有案例执行前执行
    {
        std::cout << "Foo FooEnvironment SetUP" << std::endl;
    }
    virtual void TearDown() //TearDown()方法在所有案例执行后执行
    {
        std::cout << "Foo FooEnvironment TearDown" << std::endl;
    }
};
int _tmain(int argc, _TCHAR* argv[])

{
    testing::AddGlobalTestEnvironment(new FooEnvironment);
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}

 

2)TestSuite级别的,在某一批案例中第一个案例前,最后一个案例执行后。

class FooTest : public testing::Test {
 protected:
  static void SetUpTestCase() { //在第一个TestCase之前执行
    shared_resource_ = new ;
  }
  static void TearDownTestCase() { //最后一个TestCase之后执行
    delete shared_resource_;
    shared_resource_ = NULL;
  }
  // Some expensive resource shared by all tests.
  static T* shared_resource_;
};

TEST_F(FooTest, Test1) //第一个TestCase
{
    // you can refer to shared_resource here 
}
TEST_F(FooTest, Test2) //第二个TestCase
{
    // you can refer to shared_resource here 
}
3)TestCase事件是挂在每个案例执行前后的,实现方式和上面的几乎一样,不过需要实现的是SetUp方法和TearDown方法:
class FooCalcTest:public testing::Test
{
protected:
    virtual void SetUp()  //在每个TestCase之前执行
    {
        m_foo.Init();
    }
    virtual void TearDown()
    {
        m_foo.Finalize();  //在每个TestCase之后执行
    }

    FooCalc m_foo;
};

TEST_F(FooCalcTest, HandleNoneZeroInput)
{
    EXPECT_EQ(4, m_foo.Calc(12, 16));
}

TEST_F(FooCalcTest, HandleNoneZeroInput_Error)
{
    EXPECT_EQ(5, m_foo.Calc(12, 16));
}

功能三:参数化测试

TEST(IsPrimeTest, HandleTrueReturn)
{
    EXPECT_TRUE(IsPrime(3));
    EXPECT_TRUE(IsPrime(5));
    EXPECT_TRUE(IsPrime(11));
    EXPECT_TRUE(IsPrime(23));
    EXPECT_TRUE(IsPrime(17));
}

改成:
TEST_P(IsPrimeParamTest, HandleTrueReturn)
{
    int n =  GetParam();
    EXPECT_TRUE(IsPrime(n));
}
INSTANTIATE_TEST_CASE_P(TrueReturn, IsPrimeParamTest, testing::Values(3, 5, 11, 23, 17));

功能四:死亡测试和运行参数 ... 

ASSERT_DEATH(statement, regex`);
ASSERT_EXIT(statement, predicate, regex`);

int _tmain(int argc, _TCHAR* argv[])
{
    testing::GTEST_FLAG(output) = "xml:";
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}
posted @ 2020-01-10 16:33  heimazaifei  阅读(335)  评论(0编辑  收藏  举报