谷歌嘲笑從設備讀取

Question

我有一個模擬來模擬從設備讀取數據。問題我不知道如何設置buf值來模擬讀數。我想模擬sensor.read（buf，sizeof（int））函數中的buf值。有沒有辦法做到這一點？硒我的代碼如下：

模擬類：

class Device 
{ 
public: 
    virtual int Read(char *buf, size_t size) = 0; 
}; 

class MockDevice: public Device{ 
public: 
    MOCK_METHOD2(Read, int(char *buf, size_t size)); 
}; 

我的類：

class Sensor 
{ 
private: 
    Device *dev; 

public: 
    Sensor(Device *device): dev(device); 
    int DoRead(char *buf, size_t size){ 
    dev->Read(buf,size); 
    // How can i set the buf here? 
    } 

} 

測試：

TEST(DeviceReadTest, Read) 
{ 
    char buf[10] = {0xAA} 
    MockDevice *mockDevice = new MockDevice(); 

    EXPECT_CALL(*mockDevice, Read(_,_)).Times(1).WillOnce(Return(10)); 

    Sensor sensor(mockDevice); 

    sensor.DoRead(buf,sizeof(buf)); // I wanna pass the buf content to the mock function. Is it possible? 
} 

Answer 1

像這樣的東西應該工作：

const char read_result[] = "abc"; 
EXPECT_CALL(*mockDevice, Read(_,_)) 
    .Times(1) 
    .WillOnce(DoAll(
     SetArrayArgument<0>(
      read_result, 
      read_result + strlen(read_result)), 
     Return(strlen(read_result))); 

你可以在https://code.google.com/p/googlemock/wiki/CheatSheet#Actions

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