c++Google测试运行两次

我开始使用GoogleTest对我的代码运行单元测试。我在Ubuntu 12.04上使用Eclipse开普勒。

我在第一次测试中使用了以下课程:

所有测试.pp

#include "gtest/gtest.h"
#include "SerialManagerTest.cpp"

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

串行管理器测试.cpp

#include "gtest/gtest.h"
#include "SerialManager.h"
#include "SerialInterface.h"
#include "FakeSerialHandler.h"

namespace {

TEST(TestingSerialManager, FirstTest) {
  SerialInterface *fakeSerialHandler=new FakeSerialHandler();
  SerialManager* serialManager=new SerialManager(fakeSerialHandler);
  ASSERT_TRUE(serialManager->OpenPort());

  delete serialManager;
}

TEST(TestingSerialManager, SecondTest) {
SerialInterface *fakeSerialHandler=new FakeSerialHandler();
SerialManager* serialManager=new SerialManager(fakeSerialHandler);
ASSERT_FALSE(!serialManager->OpenPort());

delete serialManager;
}
}

当我运行测试时,我得到这个输出

[==========] Running 4 tests from 1 test case.
[----------] Global test environment set-up.
[----------] 4 tests from TestingSerialManager
[ RUN      ] TestingSerialManager.FirstTest
[       OK ] TestingSerialManager.FirstTest (0 ms)
[ RUN      ] TestingSerialManager.SecondTest
[       OK ] TestingSerialManager.SecondTest (0 ms)
[ RUN      ] TestingSerialManager.FirstTest
[       OK ] TestingSerialManager.FirstTest (0 ms)
[ RUN      ] TestingSerialManager.SecondTest
[       OK ] TestingSerialManager.SecondTest (0 ms)
[----------] 4 tests from TestingSerialManager (2 ms total)

[----------] Global test environment tear-down
[==========] 4 tests from 1 test case ran. (3 ms total)
[  PASSED  ] 4 tests.

为什么每个测试都要处理两次?