Question

我知道这已被多次询问，但没有一个答案适合我。这是我想测试的模拟功能：

  MOCK_METHOD2(sendInternal, void(uint8_t data[], uint8_t size));

测试就像这样

    uint8_t expectedMessageData[3] = { 0x08, 0xda, 0xff };


    EXPECT_CALL(*serverFake, sendInternal(testing::_,3))
            .With(testing::Args<0, 1>(ElementsAre(0x08, 0xda, 0xff)))
            .Times(1);

但这会导致

预期的args：是一个元组，其字段（＃0，＃1）有2个元素元素＃0等于＆＃39; \ b＆＃39; （8），元素＃1等于＆＃39; \ xDA＆＃39; （218）实际：不匹配，其字段（＃0，＃1）为（0x7fcfd9500590，＆＃39; \ x11＆＃39;（3）），其中包含3个元素

对我来说，似乎Gmock会比较params而不是数组的元素。

我甚至构建了一个自定义匹配器：

MATCHER_P2(HasBytes, bytes, size, "") {
    uint8_t * dataToCheck = arg;
    bool isMatch = (memcmp(dataToCheck, bytes, size) == 0);
    return isMatch;
}

我可以看到（在调试时）isMatch == true但测试仍然失败。

请帮忙！

Answer 1

首先，我没有重现你的问题。以下示例编译并通过测试：

class ServerFake {
  public:
    MOCK_METHOD2(sendInternal, void(uint8_t data[], uint8_t size));
};

// If only possible, I recommend you to use std::vector instead of raw array
class ServerFake2 {
  public:
    MOCK_METHOD1(sendInternal, void(std::vector<uint8_t> data));
};

MATCHER_P2(HasBytes, bytes, size, "") {
    // unnecessary assignment, I think ...
    uint8_t * dataToCheck = arg;
    bool isMatch = (memcmp(dataToCheck, bytes, size) == 0);
    return isMatch;
}

using ::testing::ElementsAre;

TEST(xxx, yyy) {

    ServerFake* serverFake = new ServerFake;
    ServerFake2* serverFake2 = new ServerFake2;

    uint8_t expectedMessageData[3] = { 0x08, 0xda, 0xff };
    std::vector<uint8_t> expectedMessageData2({ 0x08, 0xda, 0xff });

    EXPECT_CALL(*serverFake, sendInternal(HasBytes(expectedMessageData, 3), 3)).Times(1);
    // the code below compiles and passes as well! However, I didn't check why;
    // EXPECT_CALL(*serverFake, sendInternal(testing::_,3))
    //     .With(testing::Args<0, 1>(ElementsAre(0x08, 0xda, 0xff)))
    //     .Times(1);
    serverFake->sendInternal(expectedMessageData, 3);


    // much better, do like this!
    EXPECT_CALL(*serverFake2, sendInternal(ElementsAre(0x08, 0xda, 0xff))).Times(1);
    serverFake2->sendInternal(expectedMessageData2);


    delete serverFake;
    delete serverFake2;
}

其次，根据this topic，ElementsAre正式不支持C风格的数组。如果您真的无法更改方法签名，并且您真的希望在原始数组上使用ElementsAre，则可以使用该主题中提出的hack。欢呼声。

Google Mock匹配数组

1 个答案: