C ++单元测试挂

Question

我正在使用Visual Studio内置的C ++单元测试框架测试一些代码。测试只调用以下例程，然后执行Assert::AreEqual(returned_value, (float)1)但是，所有其他测试都运行，这只是挂起。我不明白为什么循环会是无限循环，但我可能会遗漏一些东西。感谢。

vector< vector<float> > history;
vector< vector<float> > graph;

float calculateDeviation(int period) {
    int x1 = history.front()[0];
    int x2 = x1 + period;
    int i = 0, minimum, maximum, SSres = 0, SStot = 0, j=0, R2 =0;
    float  average = 0;
    while (x2 <= history.back()[0]) {
        average += averageGradient(x1, x2);
        x1 = x2;
        x2 = + period;
    }

    x1 = history.front()[0];
    x2 = x1 + period;
    i++;
    while (j < i) {
        SSres += pow((graph[i][0]-((graph[i][2]*graph[i][0])+graph[i][3])), 2);
        SStot += pow(graph[i][0] - average, 2);
        x1 = x2;
        x2 = + period;
        j++;
    }

    R2 = 1 - (SSres / SStot);
    return R2;
}

测量以下数值＆amp;在单元测试中返回。 history.size() = 15 history[5].size() = 14 graph.size() = 14 graph[1].size() = 4