Logger_Tests.cls is a bit of a mess

[jongpie]

@jongpie, how do you generate unit tests? Right now you have 2 message formats × 7 logging levels × 7 Database Results (some tests are still missing - MergeResult) - quite a lot.... Do you have a some kind of a generator (a script maybe)? I did most of the editing using cumbersome regexes (matching entire test methods with multiple capture groups), but maybe there is an easier way?
Anyway, please strongly consider refactoring the test class and eliminating repeated code in favor of parametrized methods.

Originally posted by @TrangOul in #806 (comment)