我试图用googlemock模拟一个简单的C ++方法有什么问题? [英] What is wrong with my attempts to mock a simple C++ method with googlemock?
问题描述
根据单元格模式测试一个C ++方法,使标准库调用,我测试驱动网络抽象类的开发。为了单元测试代码,使标准的C库调用(我不能mock)处理BSD套接字,我定义了一个接口 ISocket
,从我的真实实现 CSocket
和mock MockSocket
继承。
As per Patterns for unit testing a C++ method that makes a standard library call, I'm test-driving development of a network-abstracting class. In order to unit test code that makes standard C library calls (which I can't mock) to handle BSD sockets, I've defined an interface ISocket
from which both my real implementation CSocket
and mock MockSocket
inherit.
写我的第一个单元测试为网络
类,使用 ISocket
为重型起重:
Now I write my first unit test for the Network
class, which uses an ISocket
for the heavy lifting:
#include "gmock/gmock.h"
#include "gtest/gtest.h"
// C standard library includes omitted
#include "MockSocket.h"
#include "Network.h"
using ::testing::Return;
namespace JrStream {
class NetworkTest : public ::testing::Test {
protected:
Network net;
ISocket * socket_ptr;
virtual void SetUp() {
socket_ptr = new MockSocket();
}
};
TEST_F(NetworkTest, InitCallsSocket) {
EXPECT_CALL((MockSocket)*socket_ptr, Socket(AF_INET, SOCK_STREAM, 0))
.Times(1)
.WillOnce(Return(5)); //fake file descriptor
ASSERT_TRUE(net.init(socket_ptr));
}
} // namespace
// gtest boilerplate main() omitted
$ b b
但是我在编译时遇到这个错误:
But I get this error on compilation:
g++ -g -Wall -Lgtest-1.5.0/lib -Igmock-1.5.0/include -Igtest-1.5.0/include -I.. -I../../Debug/src -c -o NetworkTest.o NetworkTest.cc
NetworkTest.cc: In member function ‘virtual void JrStream::NetworkTest_InitCallsSocket_Test::TestBody()’:
NetworkTest.cc:35: error: no matching function for call to ‘JrStream::MockSocket::MockSocket(JrStream::ISocket&)’
MockSocket.h:16: note: candidates are: JrStream::MockSocket::MockSocket()
MockSocket.h:16: note: JrStream::MockSocket::MockSocket(const JrStream::MockSocket&)
这里是我的界面和模拟看起来像:
And here is what my interface and mock look like:
namespace JrStream {
class ISocket {
virtual int Socket(int domain, int type, int protocol) = 0;
};
}
#include "gmock/gmock.h"
#include "ISocket.h"
namespace JrStream {
class MockSocket: public JrStream::ISocket {
MOCK_METHOD3(Socket, int(int domain, int type, int protocol));
};
}
任何想法我在这里做错了什么?
Any ideas what I'm doing wrong here?
推荐答案
我终于得到排序。引发我的是我想使用一个指针,但googlemock使用类。这是什么工作:
I finally got it sorted. What was tripping me up is that I wanted to use a pointer, but googlemock works with classes. Here's what works:
#include "gmock/gmock.h"
#include "gtest/gtest.h"
// C standard library includes omitted
#include "MockSocket.h"
#include "Network.h"
using ::testing::Return;
namespace JrStream {
class NetworkTest : public ::testing::Test {
protected:
Network net;
MockSocket sock;
};
TEST_F(NetworkTest, InitCallsSocket) {
EXPECT_CALL(sock, Socket(AF_INET, SOCK_STREAM, 0))
.Times(1)
.WillOnce(Return(5)); //fake file descriptor
ASSERT_TRUE(net.init(&sock));
}
} // namespace
// gtest boilerplate main() omitted
$ b b
这是很好的,但我想知道如果我真的需要我的指针,如何使这项工作。听起来像是读者的练习。 ;)
This is well and good, but I wonder how to make this work if I really needed my pointers. Sounds like an exercise for the reader. ;)
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