Test Custom Expecatations

[lyxking2009]

Hi, GE team,

I am trying to implement an expectation to compare two tables and returns success if they are duplicate tables.
The plan is to take the target table's schema name and table name as a parameter, and compute metrics like row count, column sum to compare with source table.
However, I am running into trouble while trying to test it. I don't see a way to pass test cases in the 'examples' so that it can load a target table from the schema name and table name,
I also tried to skip the examples test, but when I try to use it in expectation suite and checkpoints, it seems that my custom expectation is not recognized at all.

Can anyone help me point out a direction please?