440 lines
12 KiB
JavaScript
440 lines
12 KiB
JavaScript
/* global DISABLE_FLAKEY */
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import { h, render } from '../../src/preact';
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/** @jsx h */
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function getAttributes(node) {
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let attrs = {};
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for (let i=node.attributes.length; i--; ) {
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attrs[node.attributes[i].name] = node.attributes[i].value;
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}
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return attrs;
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}
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// hacky normalization of attribute order across browsers.
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function sortAttributes(html) {
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return html.replace(/<([a-z0-9-]+)((?:\s[a-z0-9:_.-]+=".*?")+)((?:\s*\/)?>)/gi, (s, pre, attrs, after) => {
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let list = attrs.match(/\s[a-z0-9:_.-]+=".*?"/gi).sort( (a, b) => a>b ? 1 : -1 );
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if (~after.indexOf('/')) after = '></'+pre+'>';
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return '<' + pre + list.join('') + after;
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});
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}
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describe('render()', () => {
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let scratch;
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before( () => {
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scratch = document.createElement('div');
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(document.body || document.documentElement).appendChild(scratch);
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});
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beforeEach( () => {
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scratch.innerHTML = '';
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});
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after( () => {
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scratch.parentNode.removeChild(scratch);
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scratch = null;
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});
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it('should create empty nodes (<* />)', () => {
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render(<div />, scratch);
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expect(scratch.childNodes)
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.to.have.length(1)
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.and.to.have.deep.property('0.nodeName', 'DIV');
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scratch.innerHTML = '';
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render(<span />, scratch);
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expect(scratch.childNodes)
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.to.have.length(1)
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.and.to.have.deep.property('0.nodeName', 'SPAN');
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scratch.innerHTML = '';
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render(<foo />, scratch);
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render(<x-bar />, scratch);
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expect(scratch.childNodes).to.have.length(2);
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expect(scratch.childNodes[0]).to.have.property('nodeName', 'FOO');
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expect(scratch.childNodes[1]).to.have.property('nodeName', 'X-BAR');
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});
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it('should nest empty nodes', () => {
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render((
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<div>
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<span />
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<foo />
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<x-bar />
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</div>
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), scratch);
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expect(scratch.childNodes)
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.to.have.length(1)
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.and.to.have.deep.property('0.nodeName', 'DIV');
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let c = scratch.childNodes[0].childNodes;
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expect(c).to.have.length(3);
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expect(c).to.have.deep.property('0.nodeName', 'SPAN');
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expect(c).to.have.deep.property('1.nodeName', 'FOO');
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expect(c).to.have.deep.property('2.nodeName', 'X-BAR');
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});
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it('should not render falsey values', () => {
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render((
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<div>
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{null},{undefined},{false},{0},{NaN}
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</div>
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), scratch);
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expect(scratch.firstChild).to.have.property('innerHTML', ',,,0,NaN');
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});
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it('should clear falsey attributes', () => {
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let root = render((
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<div anull="anull" aundefined="aundefined" afalse="afalse" anan="aNaN" a0="a0" />
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), scratch);
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root = render((
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<div anull={null} aundefined={undefined} afalse={false} anan={NaN} a0={0} />
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), scratch, root);
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expect(getAttributes(scratch.firstChild), 'from previous truthy values').to.eql({
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a0: '0',
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anan: 'NaN'
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});
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scratch.innerHTML = '';
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root = render((
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<div anull={null} aundefined={undefined} afalse={false} anan={NaN} a0={0} />
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), scratch);
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expect(getAttributes(scratch.firstChild), 'initial render').to.eql({
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a0: '0',
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anan: 'NaN'
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});
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});
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it('should clear falsey input values', () => {
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let root = render((
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<div>
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<input value={0} />
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<input value={false} />
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<input value={null} />
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<input value={undefined} />
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</div>
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), scratch);
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expect(root.children[0]).to.have.property('value', '0');
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expect(root.children[1]).to.have.property('value', 'false');
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expect(root.children[2]).to.have.property('value', '');
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expect(root.children[3]).to.have.property('value', '');
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});
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it('should clear falsey DOM properties', () => {
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let root;
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function test(val) {
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root = render((
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<div>
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<input value={val} />
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<table border={val} />
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</div>
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), scratch, root);
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}
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test('2');
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test(false);
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expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for false');
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test('3');
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test(null);
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expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for null');
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test('4');
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test(undefined);
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expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for undefined');
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});
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it('should apply string attributes', () => {
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render(<div foo="bar" data-foo="databar" />, scratch);
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let div = scratch.childNodes[0];
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expect(div).to.have.deep.property('attributes.length', 2);
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expect(div).to.have.deep.property('attributes[0].name', 'foo');
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expect(div).to.have.deep.property('attributes[0].value', 'bar');
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expect(div).to.have.deep.property('attributes[1].name', 'data-foo');
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expect(div).to.have.deep.property('attributes[1].value', 'databar');
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});
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it('should apply class as String', () => {
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render(<div class="foo" />, scratch);
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expect(scratch.childNodes[0]).to.have.property('className', 'foo');
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});
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it('should alias className to class', () => {
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render(<div className="bar" />, scratch);
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expect(scratch.childNodes[0]).to.have.property('className', 'bar');
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});
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it('should apply style as String', () => {
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render(<div style="top:5px; position:relative;" />, scratch);
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expect(scratch.childNodes[0]).to.have.deep.property('style.cssText')
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.that.matches(/top\s*:\s*5px\s*/)
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.and.matches(/position\s*:\s*relative\s*/);
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});
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it('should only register on* functions as handlers', () => {
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let click = () => {},
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onclick = () => {};
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let proto = document.createElement('div').constructor.prototype;
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sinon.spy(proto, 'addEventListener');
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render(<div click={ click } onClick={ onclick } />, scratch);
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expect(scratch.childNodes[0]).to.have.deep.property('attributes.length', 0);
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expect(proto.addEventListener).to.have.been.calledOnce
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.and.to.have.been.calledWithExactly('click', sinon.match.func, false);
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proto.addEventListener.restore();
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});
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it('should add and remove event handlers', () => {
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let click = sinon.spy(),
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mousedown = sinon.spy();
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let proto = document.createElement('div').constructor.prototype;
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sinon.spy(proto, 'addEventListener');
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sinon.spy(proto, 'removeEventListener');
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function fireEvent(on, type) {
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let e = document.createEvent('Event');
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e.initEvent(type, true, true);
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on.dispatchEvent(e);
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}
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render(<div onClick={ () => click(1) } onMouseDown={ mousedown } />, scratch);
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expect(proto.addEventListener).to.have.been.calledTwice
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.and.to.have.been.calledWith('click')
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.and.calledWith('mousedown');
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fireEvent(scratch.childNodes[0], 'click');
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expect(click).to.have.been.calledOnce
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.and.calledWith(1);
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proto.addEventListener.reset();
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click.reset();
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render(<div onClick={ () => click(2) } />, scratch, scratch.firstChild);
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expect(proto.addEventListener).not.to.have.been.called;
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expect(proto.removeEventListener)
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.to.have.been.calledOnce
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.and.calledWith('mousedown');
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fireEvent(scratch.childNodes[0], 'click');
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expect(click).to.have.been.calledOnce
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.and.to.have.been.calledWith(2);
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fireEvent(scratch.childNodes[0], 'mousedown');
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expect(mousedown).not.to.have.been.called;
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proto.removeEventListener.reset();
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click.reset();
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mousedown.reset();
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render(<div />, scratch, scratch.firstChild);
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expect(proto.removeEventListener)
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.to.have.been.calledOnce
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.and.calledWith('click');
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fireEvent(scratch.childNodes[0], 'click');
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expect(click).not.to.have.been.called;
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proto.addEventListener.restore();
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proto.removeEventListener.restore();
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});
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it('should use capturing for events that do not bubble', () => {
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let click = sinon.spy(),
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focus = sinon.spy();
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let root = render((
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<div onClick={click} onFocus={focus}>
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<button />
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</div>
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), scratch);
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root.firstElementChild.click();
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root.firstElementChild.focus();
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expect(click, 'click').to.have.been.calledOnce;
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if (DISABLE_FLAKEY!==true) {
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// Focus delegation requires a 50b hack I'm not sure we want to incur
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expect(focus, 'focus').to.have.been.calledOnce;
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// IE doesn't set it
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expect(click).to.have.been.calledWithMatch({ eventPhase: 0 }); // capturing
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expect(focus).to.have.been.calledWithMatch({ eventPhase: 0 }); // capturing
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}
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});
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it('should serialize style objects', () => {
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let root = render((
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<div style={{
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color: 'rgb(255, 255, 255)',
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background: 'rgb(255, 100, 0)',
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backgroundPosition: '10px 10px',
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'background-size': 'cover',
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padding: 5,
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top: 100,
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left: '100%'
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}}>
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test
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</div>
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), scratch);
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let { style } = scratch.childNodes[0];
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expect(style).to.have.property('color').that.equals('rgb(255, 255, 255)');
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expect(style).to.have.property('background').that.contains('rgb(255, 100, 0)');
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expect(style).to.have.property('backgroundPosition').that.equals('10px 10px');
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expect(style).to.have.property('backgroundSize', 'cover');
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expect(style).to.have.property('padding', '5px');
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expect(style).to.have.property('top', '100px');
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expect(style).to.have.property('left', '100%');
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root = render((
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<div style={{ color: 'rgb(0, 255, 255)' }}>test</div>
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), scratch, root);
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expect(root).to.have.deep.property('style.cssText').that.equals('color: rgb(0, 255, 255);');
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root = render((
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<div style="display: inline;">test</div>
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), scratch, root);
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expect(root).to.have.deep.property('style.cssText').that.equals('display: inline;');
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root = render((
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<div style={{ backgroundColor: 'rgb(0, 255, 255)' }}>test</div>
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), scratch, root);
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expect(root).to.have.deep.property('style.cssText').that.equals('background-color: rgb(0, 255, 255);');
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});
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it('should serialize class/className', () => {
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render(<div class={{
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no1: false,
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no2: 0,
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no3: null,
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no4: undefined,
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no5: '',
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yes1: true,
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yes2: 1,
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yes3: {},
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yes4: [],
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yes5: ' '
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}} />, scratch);
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let { className } = scratch.childNodes[0];
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expect(className).to.be.a.string;
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expect(className.split(' '))
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.to.include.members(['yes1', 'yes2', 'yes3', 'yes4', 'yes5'])
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.and.not.include.members(['no1', 'no2', 'no3', 'no4', 'no5']);
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});
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it('should support dangerouslySetInnerHTML', () => {
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let html = '<b>foo & bar</b>';
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let root = render(<div dangerouslySetInnerHTML={{ __html: html }} />, scratch);
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expect(scratch.firstChild).to.have.property('innerHTML', html);
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expect(scratch.innerHTML).to.equal('<div>'+html+'</div>');
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root = render(<div>a<strong>b</strong></div>, scratch, root);
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expect(scratch).to.have.property('innerHTML', `<div>a<strong>b</strong></div>`);
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root = render(<div dangerouslySetInnerHTML={{ __html: html }} />, scratch, root);
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expect(scratch.innerHTML).to.equal('<div>'+html+'</div>');
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});
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it('should reconcile mutated DOM attributes', () => {
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let check = p => render(<input type="checkbox" checked={p} />, scratch, scratch.lastChild),
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value = () => scratch.lastChild.checked,
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setValue = p => scratch.lastChild.checked = p;
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check(true);
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expect(value()).to.equal(true);
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check(false);
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expect(value()).to.equal(false);
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check(true);
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expect(value()).to.equal(true);
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setValue(true);
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check(false);
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expect(value()).to.equal(false);
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setValue(false);
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check(true);
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expect(value()).to.equal(true);
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});
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it('should ignore props.children if children are manually specified', () => {
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expect(
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<div a children={['a', 'b']}>c</div>
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).to.eql(
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<div a>c</div>
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);
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});
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it('should reorder child pairs', () => {
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let root = render((
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<div>
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<a>a</a>
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<b>b</b>
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</div>
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), scratch, root);
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let a = scratch.firstChild.firstChild;
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let b = scratch.firstChild.lastChild;
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expect(a).to.have.property('nodeName', 'A');
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expect(b).to.have.property('nodeName', 'B');
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root = render((
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<div>
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<b>b</b>
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<a>a</a>
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</div>
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), scratch, root);
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expect(scratch.firstChild.firstChild).to.have.property('nodeName', 'B');
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expect(scratch.firstChild.lastChild).to.have.property('nodeName', 'A');
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expect(scratch.firstChild.firstChild).to.equal(b);
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expect(scratch.firstChild.lastChild).to.equal(a);
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});
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// Discussion: https://github.com/developit/preact/issues/287
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('HTMLDataListElement' in window ? it : xit)('should allow <input list /> to pass through as an attribute', () => {
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render((
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<div>
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<input type="range" min="0" max="100" list="steplist" />
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<datalist id="steplist">
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<option>0</option>
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<option>50</option>
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<option>100</option>
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</datalist>
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</div>
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), scratch);
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let html = scratch.firstElementChild.firstElementChild.outerHTML;
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expect(sortAttributes(html)).to.equal(sortAttributes('<input type="range" min="0" max="100" list="steplist">'));
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});
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});
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