converts a sorted array to a binary tree

arayToBST.js

function arrayToBST(list){

  function buildTree(list, min, max){
    if (min == max){
      return {
        value: list[max],
        left: null,
        right: null
      };
    }

    console.log('asdf');
    var middle = Math.floor((min+max)/2);
    var left = buildTree(list, min, middle-1);
    var right = buildTree(list, middle+1, max);

    return {
      value: list[middle],
      left: left,
      right: right
    };
  }

  return buildTree(list, 0, list.length-1);

}

var test = [1,2,3,4,5,6,7];