[8.x] Make multiple_of validation rule handle non-integer values
#34971
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driesvints
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multiple_of validation rule handle non-integer valuesmultiple_of validation rule handle non-integer values
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Currently
multiple_ofdoes not validate some of the cases where the input is an integer multiple of the step becausefmoddoes not produce a zero on some of the cases, e.g.fmod(2, .1) = .1andfmod(.9, .3) = some really small but non zero value.This addes the tests for those cases and solves the issue by using
bcmodand checking the first 16 digits after the decimal point.Linked: discussion in #34960 and initial PR #34959 which I set to branch that I didn't intend to.