request for a rule test ui

[ssddi456]

it is too hard to try to build a valid rule for some operation, such as resReplace

and the doc is confusing, it seems to have multiple ways to write a rule, but never know if it is right util it accidently working.

Maybe there could be a page to display rule parse result, and a request simulate to show rule effect? Must help a lot.

[avwo]

Good idea, I'll think about how to implement it.