gtest：仅当必须运行特定装置时才执行某些操作的最佳方法是什么？

Question

I have a class derived from::testing::Test and several fixtures in it. I've also reimplemented SetUpTestCase method which must start the side application needed for those tests. But now I want to add a new fixture which needs that side application to be started with some additional arguments to enable logging. The problem is, I want it to be logged only if I'm sure that the new test is in the run-list and will not be missed, otherwise the logging is not necessary. So I'd like to write something like that:

class MyTest : public ::testing::Test
{
public:
    static void SetUpTestCase()
    {
        std::vector<std::string> args;
        args.push_back("--silent");

        // if (TestLogging fixture will be run)
            args.push_back("--enableLog");

        //Start the side application with arguments "args"
    }
};

TEST_F(MyTest, Test1)
{/**/}
TEST_F(MyTest, Test2)
{/**/}
TEST_F(MyTest, TestLogging)
{/**/}

Is there any way to reach the behavior I expect? Or maybe I shouldn't mess up with SetUpTestCase and there is a better way to do this?

Answer 1

You could query the test name both at SetUp and TearDown and match it against TestLogging .

In case you wanted to have more than one logging test, you could name them with a TestLogging suffix, and check if the test name starts with that suffix.

SetUp would then do the additional setup stuff, and TearDown would revert it.

[Demo]

class MyTest : public ::testing::Test {
protected:
    inline static std::vector<std::string> args{};
public:
    inline static void SetUpTestCase() {
        args.push_back("--silent");
    }
    virtual void SetUp() {
        std::string test_name{ testing::UnitTest::GetInstance()->current_test_info()->name() };
        if (test_name.starts_with("TestLogging")) {
            args.push_back("--enableLog");
        }
    }
    virtual void TearDown() {
        std::string test_name{ testing::UnitTest::GetInstance()->current_test_info()->name() };
        if (test_name.starts_with("TestLogging")) {
            args.pop_back();
        }
    }
};