/** * Module Dependencies */ var assert = require('assert'); try { var iterator = require('dom-iterator'); var parse = require('domify'); } catch (e) { var iterator = require('../'); var parse = function(str) { return require('mini-html-parser')(str).parse(); }; } /** * Tests */ describe('iterator', function() { var dom, i, article; beforeEach(function() { dom = parse('hi
whateveromg
bye'); article = dom.childNodes[1]; }); describe('(dom)', function() { it('should iterate from the top', function() { i = iterator(dom); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('
' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('
' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert('' == format(i.next(), i)); assert(null == i.next()); assert(null == i.next()); assert(null == i.next()); assert('' == format(i)); assert('bye' == format(i.prev(), i)); assert('' == format(i.prev(), i)); }); it('should iterate from the middle (opening)', function() { i = iterator(article); assert('
' == format(i)); assert('hi' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert(null == i.prev()); i.reset(); assert('
' == format(i)); assert('' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('
' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert('' == format(i.next(), i)); assert(null == i.next()); }); it('should iterate from the middle (closing)', function() { i = iterator(article).closing(); assert('
' == format(i)); assert('bye' == format(i.next(), i)); assert('' == format(i.next(), i)); assert(null == i.next()); i.reset(); assert('' == format(i)); assert('' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('omg' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('
' == format(i.prev(), i)); assert('hi' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert(null == i.prev()); }); it('should iterate from the bottom', function() { i = iterator(dom).closing(); assert('' == format(i)); assert('bye' == format(i.prev(), i)); assert('
' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('omg' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('
' == format(i.prev(), i)); assert('hi' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert(null == i.prev()); assert(null == i.prev()); assert(null == i.prev()); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('
' == format(i.next(), i)); }); }); describe('(dom, root)', function() { it('should support roots to limit iterator (opening)', function() { i = iterator(article.firstChild, article); assert('' == format(i)); assert(null == i.prev()); assert(null == i.prev()); assert('' == format(i)); assert('whatever' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('' == format(i.next(), i)); assert(null == i.next()); assert(null == i.next()); assert('' == format(i)); }); it('should support roots to limit iterator (closing)', function() { i = iterator(article.lastChild, article).closing(); assert('' == format(i)); assert(null == i.next()); assert(null == i.next()); assert('' == format(i.prev(), i)); assert('omg' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert(null == i.prev()); assert(null == i.prev()); assert('' == format(i)); }); it('should not throw an Error when given a falsey DOM node', function() { var dom = parse('
'); var it = iterator(dom.firstChild, dom); assert(null == it.next()); }); }); describe('atOpening() & atClosing()', function() { it('should accurately return atOpening() or atClosing()', function() { i = iterator(dom); assert(i.atOpening()); i.next(); // hi assert(i.atOpening()); i.next(); // article assert(i.atOpening()); i.next(); // em assert(i.atOpening()); i.next(); // whatever assert(i.atOpening()); i.next(); // /em assert(i.atClosing()); i.next(); // omg assert(i.atOpening()); i.next(); // strong assert(i.atOpening()); i.next(); // /strong assert(i.atClosing()); i.next(); // /article assert(i.atClosing()); i.next(); // bye assert(i.atOpening()); i.next(); // /body assert(i.atClosing()); i.next(); // /body assert(i.atClosing()); i.next(); // /body assert(i.atClosing()); }); }); describe('revisit(false)', function() { it('from top: should ignore the element if you pass it again', function() { i = iterator(dom).revisit(false); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('
' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert(null == i.next()); assert(null == i.next()); assert(null == i.next()); assert('bye' == format(i)); assert('
' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('omg' == format(i.prev(), i)); }); it('from bottom: should ignore the element if you pass it again', function() { i = iterator(dom).revisit(false).closing(); assert('' == format(i)); assert('bye' == format(i.prev(), i)); assert('
' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('omg' == format(i.prev(), i)); assert('' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('hi' == format(i.prev(), i)); assert(null == i.prev()); assert(null == i.prev()); assert(null == i.prev()); assert('hi' == format(i)); assert('
' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); }); }); describe('peak', function() { it('should allow you to peak in front', function() { i = iterator(dom); assert('hi' == i.peak().nodeValue); assert('BODY' == i.node.nodeName); assert('hi' == i.next().nodeValue); }); it('should allow you to peak behind', function() { i = iterator(article).closing(); assert('STRONG' == i.peak(-1).nodeName); assert('ARTICLE' == i.node.nodeName); assert('STRONG' == i.prev().nodeName); }); it('should allow you to peak forward multiple nodes', function() { i = iterator(dom); assert('EM' == i.peak(3).nodeName); assert('BODY' == i.node.nodeName); assert('hi' == i.next().nodeValue); }); it('should allow you to peak behind multiple nodes', function() { i = iterator(article).closing(); assert('omg' == i.peak(-3).nodeValue); assert('ARTICLE' == i.node.nodeName); assert('STRONG' == i.prev().nodeName); }); }); describe('it.{next,prev}(expr)', function() { it('should work with numbers', function() { i = iterator(dom); assert('hi' == format(i.next(3), i)); assert('
' == format(i.next(1), i)); assert('' == format(i.next(1), i)); assert('whatever' == format(i.next(3), i)); assert('' == format(i.next(1), i)); assert('' == format(i.next(1), i)); assert('' == format(i.next(1), i)); assert('omg' == format(i.prev(3), i)); assert('whatever' == format(i.prev(3), i)); assert('hi' == format(i.prev(3), i)); }); it('should work with strings', function() { i = iterator(dom); assert('omg' == i.next('nodeValue == "omg"').nodeValue); assert('bye' == i.next('nodeType == 3 && nodeValue == "bye"').nodeValue); assert('omg' == i.prev('nodeType == 3 && nodeValue == "omg"').nodeValue); assert('BODY' == i.prev('nodeType == 1 && nodeName == "BODY"').nodeName); assert(null == i.prev('nodeType == 1 && nodeName == "BODY"')); assert('' == format(i)); }); it('should work with functions', function() { i = iterator(dom); assert('omg' == i.next(function(node) { return node.nodeValue == 'omg'; }).nodeValue); assert('BODY' == i.prev(function(node) { return node.nodeName == 'BODY'; }).nodeName); }); }); describe('it.select(expr)', function() { it('should work with numbers', function() { i = iterator(dom) .select(3) .select(8); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert(null == i.next()); assert('bye' == format(i)); assert('omg' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('hi' == format(i.prev(), i)); assert(null == i.prev()); assert('hi' == format(i)); }); it('should work with strings', function() { i = iterator(dom) .select('nodeValue == "omg"') .select('nodeName == "ARTICLE"'); assert('' == format(i)); assert('
' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('
' == format(i.next(), i)); assert(null == i.next()); assert('
' == format(i)); }); }); describe('it.reject(expr)', function() { it('should work with numbers', function() { i = iterator(dom) .reject(1) .reject(8); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('omg' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert(null == i.next()); assert('bye' == format(i)); assert('omg' == format(i.prev(), i)); assert('whatever' == format(i.prev(), i)); assert('hi' == format(i.prev(), i)); assert(null == i.prev()); assert('hi' == format(i)); }); it('should work with strings', function() { i = iterator(dom) .reject('nodeValue == "omg"') .reject('nodeName == "ARTICLE"'); assert('' == format(i)); assert('hi' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('whatever' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('' == format(i.next(), i)); assert('bye' == format(i.next(), i)); assert('' == format(i.next(), i)); assert(null == i.next()); assert(null == i.next()); assert(null == i.next()); assert('' == format(i)); assert('bye' == format(i.prev(), i)); assert('' == format(i.prev(), i)); }); }); function format(node, it) { if (arguments.length == 1) it = node, node = it.node; var name = node.nodeName.toLowerCase(); var type = node.nodeType; var closing = it.atClosing(); var out = null; if (3 == type) { out = node.nodeValue; } else if (1 == type) { out = it.atClosing() ? '' : '<' + name + '>'; } return out; } });