[Discuss] How to verify the correction of the implementation of op when the input's shape is bigger?

[chengduoZH]

Currently, we have completed many ops' forward and backward and ensured their basic function in small data shape by the unit test. But we can't 100% confirm that there is no error in code implementation because the input shape is too small in our unit test, some error may appear only when the input shape is bigger.
Now, there are two implementations in this case, #9120 and #10150. Although the two bug has been fixed, it takes a long time to locate it. I am not sure whether other ops are in this case too. So how can we avoid this error happen again?

One solution that I think of is to increase the input’s shape of Op and put it on CE to verify its correctness.

[shanyi15]

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