可视化图像处理代码的测试输出

I have image processing tasks I want to test against fixed data and as a part of this, I would want to see the output. When I run a test with XCTest though, I cannot save an image to albums (doesn't error out, but doesn't save even) and from what I know I cannot stop the test and visualize something on screen. What is the approach in this case?I have image processing tasks I want to test ag