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traverse and transform objects by visiting every node on a recursive walk

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'use strict';

var traverse = require('../');
var test = require('tape');

test('negative update test', function (t) {
	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); }
	});

	t.same(
		fixed,
		[5, 6, 125, [7, 8, 126, 1], { f: 10, g: 115 }],
		'Negative values += 128'
	);

	t.same(
		obj,
		[5, 6, -3, [7, 8, -2, 1], { f: 10, g: -13 }],
		'Original references not modified'
	);

	t.end();
});