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document.test.js
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document.test.js
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'use strict'
const { getTestParser } = require('../get-test-parser')
const { DOMImplementation, DOMException } = require('../../lib/dom')
const INPUT = (first = '', second = '', third = '', fourth = '') => `
<html >
<body id="body">
<p id="p1" class=" quote first odd ${first} ">Lorem ipsum</p>
<p id="p2" class=" quote second even ${second} ">Lorem ipsum</p>
<p id="p3" class=" quote third odd ${third} ">Lorem ipsum</p>
<p id="p4" class=" quote fourth even ${fourth} ">Lorem ipsum</p>
</body>
</html>
`
/**
* Whitespace that can be part of classnames.
* Some characters (like `\u2028`) will be normalized when parsing,
* but they can still be added to the dom after parsing.
*
* @see https://www.w3.org/TR/html52/infrastructure.html#set-of-space-separated-tokens
* @see normalizeLineEndings
* @see https://www.w3.org/TR/xml11/#sec-line-ends
*/
const NON_HTML_WHITESPACE =
'\v\u00a0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000\ufeff'
describe('Document.prototype', () => {
describe('getElementsByClassName', () => {
it('should be able to resolve [] as a class name', () => {
const doc = getTestParser().parser.parseFromString(INPUT('[]'))
expect(doc.getElementsByClassName('[]')).toHaveLength(1)
})
it('should be able to resolve [ as a class name', () => {
const doc = getTestParser().parser.parseFromString(INPUT('['))
expect(doc.getElementsByClassName('[')).toHaveLength(1)
})
it('should be able to resolve multiple class names in a different order', () => {
const doc = getTestParser().parser.parseFromString(INPUT())
expect(doc.getElementsByClassName('odd quote')).toHaveLength(2)
})
it('should be able to resolve non html whitespace as classname', () => {
const doc = getTestParser().parser.parseFromString(INPUT())
const firstP = doc.documentElement
.getElementsByTagName('body')[0]
.getElementsByTagName('p')[0]
expect(firstP).toBeDefined()
firstP.setAttribute(
'class',
firstP.getAttribute('class') + ' ' + NON_HTML_WHITESPACE
)
expect(
doc.getElementsByClassName(`quote ${NON_HTML_WHITESPACE}`)
).toHaveLength(1)
})
it('should not allow regular expression in argument', () => {
const search = '(((a||||)+)+)+'
const matching = 'aaaaa'
expect(new RegExp(search).test(matching)).toBe(true)
const doc = getTestParser().parser.parseFromString(
INPUT(search, matching, search)
)
expect(doc.getElementsByClassName(search)).toHaveLength(2)
})
it('should return an empty collection when no class names or are passed', () => {
const doc = getTestParser().parser.parseFromString(INPUT())
expect(doc.getElementsByClassName('')).toHaveLength(0)
})
it('should return an empty collection when only spaces are passed', () => {
const doc = getTestParser().parser.parseFromString(
INPUT(' \f\n\r\t', ' \f\n\r\t', ' \f\n\r\t', ' \f\n\r\t')
)
expect(doc.getElementsByClassName(' \f\n\r\t')).toHaveLength(0)
})
it('should return only the case insensitive matching names', () => {
const MIXED_CASES = ['AAA', 'AAa', 'AaA', 'aAA']
const doc = getTestParser().parser.parseFromString(INPUT(...MIXED_CASES))
MIXED_CASES.forEach((className) => {
expect(doc.getElementsByClassName(className)).toHaveLength(1)
})
})
})
describe('doctype', () => {
it('should be added when passed to createDocument', () => {
const impl = new DOMImplementation()
const doctype = impl.createDocumentType('name')
const doc = impl.createDocument(null, undefined, doctype)
expect(doc.doctype === doctype).toBe(true)
expect(doctype.ownerDocument === doc).toBe(true)
expect(doc.firstChild === doctype).toBe(true)
})
})
describe('insertBefore', () => {
it('should insert the first element and set `documentElement`', () => {
const doc = new DOMImplementation().createDocument(null, '')
expect(doc.childNodes).toHaveLength(0)
expect(doc.documentElement).toBeNull()
const root = doc.createElement('root')
doc.insertBefore(root)
expect(doc.documentElement).toBe(root)
expect(doc.childNodes).toHaveLength(1)
expect(doc.childNodes.item(0)).toBe(root)
})
it('should prevent inserting a second element', () => {
const doc = new DOMImplementation().createDocument(null, '')
const root = doc.createElement('root')
const second = doc.createElement('second')
doc.insertBefore(root)
expect(() => doc.insertBefore(second)).toThrow(DOMException)
expect(doc.documentElement).toBe(root)
expect(doc.childNodes).toHaveLength(1)
})
it('should prevent inserting an element before a doctype', () => {
const impl = new DOMImplementation()
const doctype = impl.createDocumentType('DT')
const doc = impl.createDocument(null, '', doctype)
expect(doc.childNodes).toHaveLength(1)
const root = doc.createElement('root')
expect(() => doc.insertBefore(root, doctype)).toThrow(DOMException)
expect(doc.documentElement).toBeNull()
expect(doc.childNodes).toHaveLength(1)
expect(root.parentNode).toBeNull()
})
it('should prevent inserting a second doctype', () => {
const impl = new DOMImplementation()
const doctype = impl.createDocumentType('DT')
const doctype2 = impl.createDocumentType('DT2')
const doc = impl.createDocument(null, '', doctype)
expect(doc.childNodes).toHaveLength(1)
expect(() => doc.insertBefore(doctype2)).toThrow(DOMException)
expect(doc.childNodes).toHaveLength(1)
})
it('should prevent inserting a doctype after an element', () => {
const impl = new DOMImplementation()
const doc = impl.createDocument(null, '')
const root = doc.createElement('root')
doc.insertBefore(root)
const doctype = impl.createDocumentType('DT')
expect(doc.childNodes).toHaveLength(1)
expect(() => doc.insertBefore(doctype)).toThrow(DOMException)
expect(doc.childNodes).toHaveLength(1)
})
it('should prevent inserting before an child which is not a child of parent', () => {
const doc = new DOMImplementation().createDocument(null, '')
const root = doc.createElement('root')
const withoutParent = doc.createElement('second')
expect(() => doc.insertBefore(root, withoutParent)).toThrow(DOMException)
expect(doc.documentElement).toBeNull()
expect(doc.childNodes).toHaveLength(0)
expect(root.parentNode).toBeNull()
})
})
describe('replaceChild', () => {
it('should remove the only element and add the new one', () => {
const doc = new DOMImplementation().createDocument('', 'xml')
const initialFirstChild = doc.firstChild
const replacement = doc.createElement('replaced')
doc.replaceChild(replacement, doc.firstChild)
expect(doc.childNodes).toHaveLength(1)
expect(initialFirstChild.parentNode).toBeNull()
expect(doc.documentElement.name).toBe(replacement.name)
})
})
describe('removeChild', () => {
it('should remove all connections to node', () => {
const doc = new DOMImplementation().createDocument('', 'xml')
doc.insertBefore(doc.createComment('just a comment'), doc.firstChild)
expect(doc.childNodes).toHaveLength(2)
const initialElement = doc.firstChild
doc.removeChild(initialElement)
// expect(doc.documentElement).toBeNull();
expect(initialElement.parentNode).toBeNull()
expect(initialElement.nextSibling).toBeNull()
// expect(initialElement.previousSibling).toBeNull();
expect(doc.childNodes).toHaveLength(1)
})
})
})