DPP and ELP approached me and reported that there was a NEGATIVE BILL last month. ELP was very quick to point out that i should put in code that checks for negative consumptions during bill computation.
My first reaction was unfavorable; I told him the flow of the system should be sufficient in preventing such problems. After some more thought, though, I realized that it's not a bad idea to do that as a "last line of defense" against this particular problem.
I then proceeded to search for bugs. During this search, I found out that the account is a mother meter and quickly realized that it was already PreVALIDATED by the program and retained its validation status even after the encoder has subtracted the sub-meters' consumptions. So I also added code that re-validates the reading after said input.
Friday, February 15, 2008
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