var Traverse = require('traverse'); var assert = require('assert'); exports['negative update test'] = function () { var obj = [ 5, 6, -3, [ 7, 8, -2, 1 ], { f : 10, g : -13 } ]; var fixed = Traverse.map(obj, function (x) { if (x < 0) this.update(x + 128); }); assert.deepEqual(fixed, [ 5, 6, 125, [ 7, 8, 126, 1 ], { f: 10, g: 115 } ], 'Negative values += 128' ); assert.deepEqual(obj, [ 5, 6, -3, [ 7, 8, -2, 1 ], { f: 10, g: -13 } ], 'Original references not modified' ); }