opencv/modules/dnn/test/test_common.hpp

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#ifndef __OPENCV_TEST_COMMON_HPP__
#define __OPENCV_TEST_COMMON_HPP__

inline const std::string &getOpenCVExtraDir()
{
    return cvtest::TS::ptr()->get_data_path();
}

inline void normAssert(cv::InputArray ref, cv::InputArray test, const char *comment = "",
                       double l1 = 0.00001, double lInf = 0.0001)
{
    double normL1 = cvtest::norm(ref, test, cv::NORM_L1) / ref.getMat().total();
    EXPECT_LE(normL1, l1) << comment;

    double normInf = cvtest::norm(ref, test, cv::NORM_INF);
    EXPECT_LE(normInf, lInf) << comment;
}

inline bool readFileInMemory(const std::string& filename, std::string& content)
{
    std::ios::openmode mode = std::ios::in | std::ios::binary;
    std::ifstream ifs(filename.c_str(), mode);
    if (!ifs.is_open())
        return false;

    content.clear();

    ifs.seekg(0, std::ios::end);
    content.reserve(ifs.tellg());
    ifs.seekg(0, std::ios::beg);

    content.assign((std::istreambuf_iterator<char>(ifs)),
                   std::istreambuf_iterator<char>());

    return true;
}

#endif