Unclear issue, closing

tolerance and actual value were swapped in the assertions. Corrected.

resolved

That seems a problem with your code, not a kata issue.

const Calculator = function() {
  this.evaluate = string => {
    return 1;
  }
};

Are you returning the result?

JavaScript:
i get error in every case with array length more than 1.
For example in this expression '10 * 5 / 2' :
"Expected actual value undefined to approximately equal expected value 25 (accepted relative error: 1e-9)"
and actually i have right answer in output, can somebody explain me, what is going on?

I am sorry. 5254 guys passed the kata, the tests are the same in all languages. It is not an issue of the kata but maybe a problem in your code.

Who can explain to me, why my result not acceptable?
['EAST', 'WEST', 'SOUTH', 'NORTH', 'SOUTH', 'WEST', 'WEST', 'EAST', 'SOUTH', 'NORTH']
✘ Expected: '['SOUTH', 'WEST']', instead got: '['WEST', 'SOUTH']'

['NORTH', 'SOUTH', 'EAST', 'WEST', 'NORTH', 'SOUTH', 'WEST', 'NORTH', 'EAST', 'WEST', 'NORTH', 'SOUTH', 'EAST', 'WEST']
✘ Expected: '['WEST', 'NORTH']', instead got: '['NORTH', 'WEST']'

['WEST', 'EAST', 'SOUTH', 'NORTH', 'NORTH', 'EAST', 'WEST', 'EAST', 'NORTH', 'SOUTH']
✘ Expected: '['NORTH', 'EAST']', instead got: '['EAST', 'NORTH']'