Compile and Install

unzip gtest*.zip
cd 
./configure
make

sudo cp -a include/gtest /usr/include
sudo cp -a lib/.libs /usr/lib/
// UPdate the cahce of linker
sudo ldconfig -v 

How to use in your program

// main.cpp
#include <gtest/gtest.h>
int Foo(int a, int b) {
 if (a == 0 || b == 0)
 throw "don't do that";
 int c = a % b;
 if (c == 0)
 return b;
 return Foo(b, c);
}
TEST(FooTest, HandleNoneZeroInput) {
 EXPECT_EQ(2, Foo(4, 10));
 EXPECT_EQ(6, Foo(30, 18));
}
// Optional
// We can ignore main fucntion witch explicit -lgtest_main 
int main(int argc, char* argv[]) {
 testing::InitGoogleTest(&argc, argv);
 return RUN_ALL_TESTS();
}

g++ -o main main.cpp -lpthread -lgtest -lgtest_main