Google单元测试期望暴露者调用该方法

Question

我正在尝试调用当前调用的受保护方法的EXPECT_CALL。我已经创建了这种方法的暴露者。然后，我将暴露器中的方法添加到了模拟中。

TEST_F(ExposureGainController_Test, SetScale_call_SetExposureGain)
{
    TEST_DESCRIPTION("Check logic behind SetScale and auto call of SetExposureGain. ");
    ExposureGainControllerExposer c(camMock, scaleFunctionMock,
        std::unique_ptr<IMicroscopeOpticsParameters_ImageBrightness_Model>(new ImageBrightness_Model_Mock(0.5)));
    EXPECT_CALL(*camMock, RunSetExposureGain()).Times(1);
    c.SetScale(5.0);
}

在Exposer中

void RunSetExposureGain()
{ 
       SetExposureGain();
}

// SetScale Function看起来像这样：

void ExposureGainController::SetScale(double scale)
{
    if (m_scale != scale)
    {
        m_scale = scale;
        m_gainInDb = ScaleToGainInDb(m_scale);
        UpdateResidualScale();

        SetExposureGain();
    }   
}

我正在尝试执行EXPECT_CALL，但是我无法正确运行它。

我做错了什么？