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DOMElement.test.ts
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DOMElement.test.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @jest-environment jsdom
*/
/* eslint-env browser*/
import prettyFormat from '../';
import setPrettyPrint from './setPrettyPrint';
const {DOMElement} = prettyFormat.plugins;
setPrettyPrint([DOMElement]);
describe('pretty-format', () => {
// Test is not related to plugin but is related to jsdom testing environment.
it('prints global window as constructor name alone', () => {
expect(prettyFormat(window)).toEqual('[Window]');
});
});
describe('DOMElement Plugin', () => {
it('supports a single HTML element', () => {
expect(document.createElement('div')).toPrettyPrintTo('<div />');
});
it('supports an HTML element with a class property', () => {
const parent = document.createElement('div');
parent.className = 'classy';
expect(parent).toPrettyPrintTo('<div\n class="classy"\n/>');
});
it('supports an HTML element with a title property', () => {
const parent = document.createElement('div');
parent.title = 'title text';
expect(parent).toPrettyPrintTo('<div\n title="title text"\n/>');
});
test('escapes double quote in attribute value', () => {
const parent = document.createElement('div');
parent.setAttribute('title', '"escape"');
expect(parent).toPrettyPrintTo('<div\n title="\\"escape\\""\n/>');
});
it('supports an HTML element with a single attribute', () => {
const parent = document.createElement('div');
parent.setAttribute('class', 'classy');
expect(parent).toPrettyPrintTo('<div\n class="classy"\n/>');
});
it('supports an HTML element with multiple attributes', () => {
const parent = document.createElement('div');
// set attributes in unsorted order by name to verify sorting
parent.setAttribute('id', '123');
parent.setAttribute('class', 'classy');
expect(parent).toPrettyPrintTo('<div\n class="classy"\n id="123"\n/>');
});
it('supports an HTML element with attribute and text content', () => {
const parent = document.createElement('div');
parent.setAttribute('style', 'color: #99424F');
const text = document.createTextNode('Jest');
parent.appendChild(text);
expect(parent).toPrettyPrintTo(
'<div\n style="color: #99424F"\n>\n Jest\n</div>',
);
});
it('supports an element with text content', () => {
const parent = document.createElement('div');
const child = document.createTextNode('texty texty');
parent.appendChild(child);
expect(parent).toPrettyPrintTo('<div>\n texty texty\n</div>');
});
it('supports nested elements', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
parent.appendChild(child);
expect(parent).toPrettyPrintTo('<div>\n <span />\n</div>');
});
it('supports nested elements with attributes', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
parent.appendChild(child);
// set attributes in sorted order by name
child.setAttribute('class', 'classy');
child.setAttribute('id', '123');
expect(parent).toPrettyPrintTo(
'<div>\n <span\n class="classy"\n id="123"\n />\n</div>',
);
});
it('supports nested elements with attribute and text content', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
parent.appendChild(child);
child.setAttribute('style', 'color: #99424F');
const text = document.createTextNode('Jest');
child.appendChild(text);
expect(parent).toPrettyPrintTo(
'<div>\n <span\n style="color: #99424F"\n >\n Jest\n </span>\n</div>',
);
});
it('supports nested elements with text content', () => {
const parent = document.createElement('div');
const child = document.createElement('span');
parent.appendChild(child);
child.textContent = 'texty texty';
expect(parent).toPrettyPrintTo(
'<div>\n <span>\n texty texty\n </span>\n</div>',
);
});
it('supports siblings', () => {
const parent = document.createElement('div');
parent.innerHTML = '<span>some </span><span>text</span>';
expect(parent).toPrettyPrintTo(
[
'<div>',
' <span>',
' some ',
' </span>',
' <span>',
' text',
' </span>',
'</div>',
].join('\n'),
);
});
it('supports multiline text node in pre', () => {
const parent = document.createElement('pre');
parent.innerHTML = [
// prettier-ignore
'function sum(a, b) {',
' return a + b;',
'}',
].join('\n');
// Ouch. Two lines of text have same indentation for different reason:
// First line of text node because it is at child level.
// Second line of text node because they are in its content.
expect(parent).toPrettyPrintTo(
// prettier-ignore
[
'<pre>',
' function sum(a, b) {',
' return a + b;',
'}',
'</pre>'
].join('\n'),
);
});
it('supports multiline text node preceding span in pre', () => {
const parent = document.createElement('pre');
parent.innerHTML = [
'<span class="token keyword">function</span> sum(a, b) {',
' <span class="token keyword">return</span> a + b;',
'}',
].join('\n');
expect(parent).toPrettyPrintTo(
[
'<pre>',
' <span',
' class="token keyword"',
' >',
' function',
' </span>',
' sum(a, b) {',
' ',
' <span',
' class="token keyword"',
' >',
' return',
' </span>',
' a + b;',
'}',
'</pre>',
].join('\n'),
);
});
it('supports multiline text node in textarea', () => {
const textarea = document.createElement('textarea');
textarea.setAttribute('name', 'tagline');
textarea.innerHTML = `Painless.
JavaScript.
Testing.`;
expect(textarea).toPrettyPrintTo(
[
'<textarea',
' name="tagline"',
'>',
' Painless.',
'JavaScript.',
'Testing.',
'</textarea>',
].join('\n'),
);
});
it('supports empty text node', () => {
// React 16 does not render text in comments (see below)
const parent = document.createElement('span');
const text = document.createTextNode('');
parent.appendChild(text);
const abbr = document.createElement('abbr');
abbr.setAttribute('title', 'meter');
abbr.innerHTML = 'm';
parent.appendChild(abbr);
expect(parent).toPrettyPrintTo(
[
'<span>',
' ',
' <abbr',
' title="meter"',
' >',
' m',
' </abbr>',
'</span>',
].join('\n'),
);
});
it('supports non-empty text node', () => {
// React 16 does not render text in comments (see below)
const parent = document.createElement('p');
parent.innerHTML = [
'<strong>Jest</strong>',
' means ',
'<em>painless</em>',
' Javascript testing',
].join('');
expect(parent).toPrettyPrintTo(
[
'<p>',
' <strong>',
' Jest',
' </strong>',
' means ',
' <em>',
' painless',
' </em>',
' Javascript testing',
'</p>',
].join('\n'),
);
});
it('supports comment node', () => {
// React 15 does render text in comments
const parent = document.createElement('p');
parent.innerHTML = [
'<strong>Jest</strong>',
'<!-- react-text: 3 -->',
' means ',
'<!-- /react-text -->',
'<em>painless</em>',
'<!-- react-text: 5 -->',
' Javascript testing',
'<!-- /react-text -->',
].join('');
expect(parent).toPrettyPrintTo(
[
'<p>',
' <strong>',
' Jest',
' </strong>',
' <!-- react-text: 3 -->',
' means ',
' <!-- /react-text -->',
' <em>',
' painless',
' </em>',
' <!-- react-text: 5 -->',
' Javascript testing',
' <!-- /react-text -->',
'</p>',
].join('\n'),
);
});
it('supports fragment node', () => {
const fragment = document.createDocumentFragment();
const browsers = [
'Firefox',
'Chrome',
'Opera',
'Safari',
'Internet Explorer',
];
browsers.forEach(browser => {
const li = document.createElement('li');
li.textContent = browser;
fragment.appendChild(li);
});
expect(fragment).toPrettyPrintTo(
[
'<DocumentFragment>',
' <li>',
' Firefox',
' </li>',
' <li>',
' Chrome',
' </li>',
' <li>',
' Opera',
' </li>',
' <li>',
' Safari',
' </li>',
' <li>',
' Internet Explorer',
' </li>',
'</DocumentFragment>',
].join('\n'),
);
});
it('supports custom elements', () => {
class CustomElement extends HTMLElement {}
class CustomParagraphElement extends HTMLParagraphElement {}
class CustomExtendedElement extends CustomElement {}
customElements.define('custom-element', CustomElement);
customElements.define('custom-extended-element', CustomExtendedElement);
customElements.define('custom-paragraph', CustomParagraphElement, {
extends: 'p',
});
const parent = document.createElement('div');
parent.innerHTML = [
'<custom-element></custom-element>',
'<custom-extended-element></custom-extended-element>',
'<p is="custom-paragraph"></p>',
].join('');
expect(parent).toPrettyPrintTo(
[
'<div>',
' <custom-element />',
' <custom-extended-element />',
' <p',
' is="custom-paragraph"',
' />',
'</div>',
].join('\n'),
);
});
describe('matches constructor name of SVG elements', () => {
// Too bad, so sad, element.constructor.name of SVG elements
// is HTMLUnknownElement in jsdom v9 and v10
// is Element in jsdom v11
// instead of SVG…Element in browser DOM
const expected = [
'<svg',
' viewBox="0 0 1 1"',
'>',
' <title>',
' JS community logo',
' </title>',
'</svg>',
].join('\n');
test('jsdom 9 and 10', () => {
// Mock element objects to make sure the plugin really matches them.
function SVGSVGElement(attributes, ...children) {
this.nodeType = 1;
this.tagName = 'svg'; // lower case
this.attributes = attributes;
this.childNodes = children;
}
function SVGTitleElement(title) {
this.nodeType = 1;
this.tagName = 'title'; // lower case
this.attributes = [];
this.childNodes = [document.createTextNode(title)];
}
const title = new SVGTitleElement('JS community logo');
const svg = new SVGSVGElement(
[{name: 'viewBox', value: '0 0 1 1'}],
title,
);
expect(svg).toPrettyPrintTo(expected);
});
test('jsdom 11', () => {
// Mock element objects to make sure the plugin really matches them.
function Element(tagName, attributes, ...children) {
this.nodeType = 1;
this.tagName = tagName; // lower case
this.attributes = attributes;
this.childNodes = children;
}
const title = new Element('title', [], 'JS community logo');
const svg = new Element(
'svg',
[{name: 'viewBox', value: '0 0 1 1'}],
title,
);
expect(svg).toPrettyPrintTo(expected);
});
});
it('supports SVG elements', () => {
// In jsdom v9, this is NOT a regression test. See above.
const namespace = 'http://www.w3.org/2000/svg';
const title = document.createElementNS(namespace, 'title');
title.appendChild(document.createTextNode('JS community logo'));
const rect = document.createElementNS(namespace, 'rect');
// printProps sorts attributes in order by name
rect.setAttribute('width', '1');
rect.setAttribute('height', '1');
rect.setAttribute('fill', '#f7df1e');
const polyline = document.createElementNS(namespace, 'polyline');
polyline.setAttribute('id', 'J');
polyline.setAttribute('points', '0.5,0.460 0.5,0.875 0.25,0.875');
const comment = document.createComment('polyline for S');
const g = document.createElementNS(namespace, 'g');
g.setAttribute('fill', 'none');
g.setAttribute('stroke', '#000000');
g.setAttribute('stroke-width', '0.095');
g.appendChild(polyline);
g.appendChild(comment);
const svg = document.createElementNS(namespace, 'svg');
svg.setAttribute('viewBox', '0 0 1 1');
svg.appendChild(title);
svg.appendChild(rect);
svg.appendChild(g);
const parent = document.createElement('div');
parent.setAttribute('id', 'JS');
parent.appendChild(svg);
expect(parent).toPrettyPrintTo(
[
'<div',
' id="JS"',
'>',
' <svg',
' viewBox="0 0 1 1"',
' >',
' <title>',
' JS community logo',
' </title>',
' <rect',
' fill="#f7df1e"',
' height="1"',
' width="1"',
' />',
' <g',
' fill="none"',
' stroke="#000000"',
' stroke-width="0.095"',
' >',
' <polyline',
' id="J"',
' points="0.5,0.460 0.5,0.875 0.25,0.875"',
' />',
' <!--polyline for S-->',
' </g>',
' </svg>',
'</div>',
].join('\n'),
);
});
it('supports indentation for array of elements', () => {
// For example, Array.prototype.slice.call(document.getElementsByTagName(…))
const dd1 = document.createElement('dd');
dd1.innerHTML = 'to talk in a playful manner';
const dd2 = document.createElement('dd');
dd2.innerHTML = 'painless JavaScript testing';
dd2.setAttribute('style', 'color: #99424F');
expect([dd1, dd2]).toPrettyPrintTo(
[
'Array [',
' <dd>',
' to talk in a playful manner',
' </dd>,',
' <dd',
' style="color: #99424F"',
' >',
' painless JavaScript testing',
' </dd>,',
']',
].join('\n'),
);
});
it('supports maxDepth option', () => {
const dt = document.createElement('dt');
dt.innerHTML = 'jest';
const dd1 = document.createElement('dd');
dd1.innerHTML = 'to talk in a <em>playful</em> manner';
const dd2 = document.createElement('dd');
dd2.innerHTML = '<em>painless</em> JavaScript testing';
dd2.setAttribute('style', 'color: #99424F');
const dl = document.createElement('dl');
dl.appendChild(dt);
dl.appendChild(dd1);
dl.appendChild(dd2);
expect(dl).toPrettyPrintTo(
[
'<dl>',
' <dt>',
' jest',
' </dt>',
' <dd>',
' to talk in a ',
' <em … />',
' manner',
' </dd>',
' <dd',
' style="color: #99424F"',
' >',
' <em … />',
' JavaScript testing',
' </dd>',
'</dl>',
].join('\n'),
{maxDepth: 2},
);
});
it('handles `tagName` not being a string', () => {
expect({
name: 'value',
tagName: {text: 'param'},
type: 'string',
}).toPrettyPrintTo(
[
'Object {',
' "name": "value",',
' "tagName": Object {',
' "text": "param",',
' },',
' "type": "string",',
'}',
].join('\n'),
);
});
});