javascript - Test a function that takes 3 integers for all possible cases -


i have function takes in 3 integer numbers can anything.

the function performs complex comparisons on numbers , calls/returns accordingly. 

var = 1; between +/- number.max_value var b = 2;  var c = 3;  result = thefunction(a,b,c);

i need test how logic in thefunction holds possible values.

how test function possible values?

obviously can't plug in numbers , combinations of numbers!

what best amount of values (and be) can plug in , sure function work possible values??

without knowing more function, 1 can speak in generalities. common trouble cases @ , near boundaries of ranges. these include:

  • maximum value
  • minimum value
  • maximum value - 1
  • minimum value + 1
  • -1, 0, , 1

add couple of positive , negative mid-range values, , have 9 or 10 numbers test each argument. 3 arguments, 1000 cases.

knowing internals of function may allow reduce cases or may suggest additional values or value combinations might sources of trouble.

p.s. due roundoff, number.max_value - 1 evaluates number.max_value. should aiming largest representable number less number.max_value. suggests couple of additional possible trouble spots: largest , smallest integers, according the docs are:

var biggestint = 9007199254740992; var smallestint = -9007199254740992;

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