Our team plans to redefine part of the module in the obsolete code base. This is a web application written in java. It has no unit tests at all.
I asked the developer to write junit for existing functionality before re-factoring, but I'm sure it will not be very extensive.
what other measures (blackbox / whitebox / processes) can I take to make sure that re-factorization does not violate existing functions.
The current system is quite stable and has been working for over 8 years.
Thank you Gray
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