ubuntu使用gtest单元测试框架

sudo apt-get install cmake    #安装cmake
cd /usr/src/gtest
sudo cmake CMakeLists.txt
sudo make
sudo cp *.a /usr/lib/    #拷贝生成的库到/usr/lib/

//testgcd.cpp
#include <gtest/gtest.h>
int Gcd(int a, int b)    //计算最大公约数
{
    return 0 == b ? a : Gcd(b, a % b); 
}
TEST(GcdTest, IntTest)
{
    EXPECT_EQ(1, Gcd(2, 5));
    EXPECT_EQ(2, Gcd(2, 5));
    EXPECT_EQ(2, Gcd(2, 4));
    EXPECT_EQ(3, Gcd(6, 9));
}
int main(int argc, char **argv)
{
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}

[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from GcdTest
[ RUN      ] GcdTest.IntTest
testgcd.cpp:11: Failure
Value of: Gcd(2, 5)
  Actual: 1
Expected: 2
[  FAILED  ] GcdTest.IntTest (0 ms)
[----------] 1 test from GcdTest (0 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (0 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] GcdTest.IntTest
1 FAILED TEST

//!gcd.h
#ifndef GCD_H
#define GCD_H
int Gcd(int a, int b); 
#endif
//!gcd.cpp
#include "gcd.h"
int Gcd(int a, int b)
{
    return 0 == b ? a : Gcd(b, a % b); 
}
//!testgcd.cpp
#include "gcd.h"
#include <gtest/gtest.h>
TEST(GcdTest, IntTest)
{
    EXPECT_EQ(1, Gcd(2, 5));
    EXPECT_EQ(2, Gcd(2, 5));
    EXPECT_EQ(2, Gcd(2, 4));
    EXPECT_EQ(3, Gcd(6, 9));
}
int main(int argc, char **argv)
{
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}

cmake_minimum_required(VERSION 2.6)
    # Locate GTest
    find_package(GTest REQUIRED)include_directories(${GTEST_INCLUDE_DIRS}) 
    # Link testgcd with what we want to test and the GTest and pthread 
    libraryadd_executable(testgcd testgcd.cpp gcd.cpp)
    target_link_libraries(testgcd ${GTEST_LIBRARIES} pthread)

cmake CMakeLists.txt
make
./testgcd