1. Install
1.1 Get package
Using git clone.
1
| git clone https://github.com/google/googletest.git
|
Using wget to achieve tar package, you can find newest tar address at README.md.
1
2
| wget https://github.com/google/googletest/archive/release-1.10.0.tar.gz
tar -zxvf release-1.10.0.tar.gz
|
1.2 Make & Install
Both cmake or cmake3 is ok.
Read googletest/googletest/README.md for more infomation.
1
2
3
4
5
6
| $ cd googletest
$ mkdir build
$ cd build
$ cmake ..
$ make
$ sudo make install
|
1.3 Attention when cmake processing
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
| -- The C compiler identification is GNU 4.8.5
-- The CXX compiler identification is GNU 4.8.5
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonInterp: /usr/bin/python (found version "2.7.5")
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Configuring done
-- Generating done
-- Build files have been written to: /root/project/googletest-release-1.10.0/build
|
In the above log, pthread_create is finally found in pthread, so it is not found on the way, but it should be fine.
2. Simple Test
2.1 Testing code
1
2
3
4
5
| #include <iostream>
int add(int a, int b) {
return a + b;
}
|
1
2
3
4
5
6
7
8
9
10
11
12
| #include <gtest/gtest.h>
extern int add(int a, int b);
TEST(testCase, test0) {
EXPECT_EQ(add(2, 3), 5);
}
int main(int argc, char **argv) {
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
|
2.2 Compile and Run
1
2
3
4
5
6
7
8
9
10
11
12
| $ g++ add.cpp testAdd.cpp -lgtest -lpthread
$ ./a.out
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from testCase
[ RUN ] testCase.test0
[ OK ] testCase.test0 (0 ms)
[----------] 1 test from testCase (0 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (0 ms total)
[ PASSED ] 1 test.
|
-lgtest is used for linking libgtest.a
If using -lgtest_main, you can coding without main() function
Q & A
Q1: Undefined reference when linking with googletest
A:
If you downloaded the gtest source directly and used the make install from the downloaded gtest repository it may have installed header files under /usr/local/include/gtest.
If you later use apt-get (yum install) to install the gtest, it installs the header files under /usr/include/gtest.
If the version installed from the debian package is newer, your Makefile can pick up the older header files from /usr/include and give you link errors even though you are correctly linking the new libgtest.a archive.
The solution is to look for /usr/local/include/gtest and /usr/include/gtest to see if they both exist. If they do then delete the older directory.
If /usr/include/gtest is the older directory, you may want to remove it by uninstalling the libgtest-dev package.
Q2: Could not find CMAKE_ROOT
1
2
3
4
5
6
7
| CMake Error: Could not find CMAKE_ROOT !!!
CMake has most likely not been installed correctly.
Modules directory not found in
/usr/local/share/cmake-3.11
cmake version 3.11.0-rc4
CMake suite maintained and supported by Kitware (kitware.com/cmake).
|
A:
1
2
3
4
5
6
| $ wget https://cmake.org/files/v3.12/cmake-3.12.0-rc1.tar.gz
$ tar -zxvf cmake-3.12.0-rc1.tar.gz
$ cd cmake-3.12.0-rc1
$ ./bootstrap
$ gmake
$ gmake install
|
Q3: Compile error
A:
add -std=c++11 when compile
1
| $ g++ *.cpp -lgtest -lpthread -std=c++11
|
Reference