一. gtest下载安装
cd kln
git clone https://github.com/google/googletest.git
cd googletest
cmake
make && make install
➜ googletest git:(master) ✗ make && make install
[ 12%] Building CXX object googletest/CMakeFiles/gtest.dir/src/gtest-all.cc.o
[ 25%] Linking CXX static library ../lib/libgtest.a
[ 25%] Built target gtest
[ 37%] Building CXX object googlemock/CMakeFiles/gmock.dir/src/gmock-all.cc.o
[ 50%] Linking CXX static library ../lib/libgmock.a
[ 50%] Built target gmock
[ 62%] Building CXX object googlemock/CMakeFiles/gmock_main.dir/src/gmock_main.cc.o
[ 75%] Linking CXX static library ../lib/libgmock_main.a
[ 75%] Built target gmock_main
[ 87%] Building CXX object googletest/CMakeFiles/gtest_main.dir/src/gtest_main.cc.o
[100%] Linking CXX static library ../lib/libgtest_main.a
[100%] Built target gtest_main
[ 25%] Built target gtest
[ 50%] Built target gmock
[ 75%] Built target gmock_main
[100%] Built target gtest_main
Install the project...
-- Install configuration: ""
-- Up-to-date: /usr/local/include
...
二. gtest测试示例
make example
cd example
main.cpp
#include
#include
int sum(int a, int b) {
return a+b;
}
TEST(sum, testSum) {
EXPECT_EQ(5, sum(2, 3)); // 求合2+3=5
EXPECT_NE(3, sum(3, 4)); // 求合3+4 != 3
}
int main(int argc, char **argv)
{
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
编译运行
➜ first git:(master) ✗ g++ -o main main.cpp -lgtest -lpthread -std=c++11
➜ first git:(master) ✗ ./main
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from sum
[ RUN ] sum.testSum
[ OK ] sum.testSum (0 ms)
[----------] 1 test from sum (0 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (0 ms total)
[ PASSED ] 1 test.
三. gmock 测试示例
被测试的对象的接口
➜ first git:(master) ✗ cat Foo.h
#ifndef _FOO_H_INCLUDED_
#define _FOO_H_INCLUDED_
class Foo {
public:
virtual int count() = 0;
};
#endif
创建一个Mock文件，内容如下
➜ first git:(master) ✗ ../../googlemock/scripts/generator/gmock_gen.py Foo.h Foo > MockFoo.h
➜ first git:(master) ✗ cat MockFoo.h
class MockFoo : public Foo {
public:
MOCK_METHOD0(count,
int());
};
Bar.h
➜ first git:(master) ✗ cat Bar.h
#ifndef _BAR_H_INCLUDED_
#define _BAR_H_INCLUDED_
#include "Foo.h"
class Bar {
public:
Bar(Foo *foo) : m_foo(foo) {
}
int count() {
return m_foo->count();
}
private:
Foo *m_foo;
};
#endif
main.cpp
➜ first git:(master) ✗ cat main.cpp
// gtest_sum.cpp
#include
#include
#include
#include "Bar.h"
#include "MockFoo.h"
using namespace testing;
TEST(BarTest, mock_foo_in_bar) {
MockFoo *mockFoo = new MockFoo();
Bar *bar = new Bar(mockFoo);
EXPECT_CALL(*mockFoo, count())
.Times(3)
.WillOnce(Return(3))
.WillOnce(Return(6))
.WillOnce(Return(5));
EXPECT_EQ(bar->count(), 3);
EXPECT_EQ(bar->count(), 6);
EXPECT_EQ(bar->count(), 5);
delete bar;
delete mockFoo;
}
int main(int argc, char **argv)
{
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
编译运行
➜ first git:(master) ✗ g++ -o main main.cpp -lgtest -lgmock -lpthread -std=c++11
➜ first git:(master) ✗ ./main
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from BarTest
[ RUN ] BarTest.mock_foo_in_bar
[ OK ] BarTest.mock_foo_in_bar (0 ms)
[----------] 1 test from BarTest (0 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (0 ms total)
[ PASSED ] 1 test.
故意出错
➜ first git:(master) ✗ cat main.cpp
// gtest_sum.cpp
#include
#include
#include
#include "Bar.h"
#include "MockFoo.h"
using namespace testing;
TEST(BarTest, mock_foo_in_bar) {
MockFoo *mockFoo = new MockFoo();
Bar *bar = new Bar(mockFoo);
EXPECT_CALL(*mockFoo, count())
.Times(5)
.WillOnce(Return(2))
.WillOnce(Return(6))
.WillOnce(Return(5));
EXPECT_EQ(bar->count(), 3);
EXPECT_EQ(bar->count(), 6);
EXPECT_EQ(bar->count(), 5);
delete bar;
delete mockFoo;
}
int main(int argc, char **argv)
{
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
编译执行后的报错
➜ first git:(master) ✗ g++ -o main main.cpp -lgtest -lgmock -lpthread -std=c++11
➜ first git:(master) ✗ ./main
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from BarTest
[ RUN ] BarTest.mock_foo_in_bar
GMOCK WARNING:
main.cpp:14: Too few actions specified in EXPECT_CALL(*mockFoo, count())...
Expected to be called 5 times, but has only 3 WillOnce()s.main.cpp:20: Failure
Expected equality of these values:
bar->count()
Which is: 2
3
main.cpp:14: Failure
Actual function call count doesn't match EXPECT_CALL(*mockFoo, count())...
Expected: to be called 5 times
Actual: called 3 times - unsatisfied and active
[ FAILED ] BarTest.mock_foo_in_bar (0 ms)
[----------] 1 test from BarTest (0 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (1 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] BarTest.mock_foo_in_bar
1 FAILED TEST