Merge commit '30b577138dda685f65a8529be1866afa6e321845' as 'thirdparty/preact'

10 files changed, 2766 insertions, 0 deletions

diff --git a/thirdparty/preact/test/browser/components.js b/thirdparty/preact/test/browser/components.js
new file mode 100644
index 000000000..b4649a719
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+++ b/thirdparty/preact/test/browser/components.js
@@ -0,0 +1,713 @@
+import { h, render, rerender, Component } from '../../src/preact';
+/** @jsx h */
+
+let spyAll = obj => Object.keys(obj).forEach( key => sinon.spy(obj,key) );
+
+function getAttributes(node) {
+	let attrs = {};
+	if (node.attributes) {
+		for (let i=node.attributes.length; i--; ) {
+			attrs[node.attributes[i].name] = node.attributes[i].value;
+		}
+	}
+	return attrs;
+}
+
+// hacky normalization of attribute order across browsers.
+function sortAttributes(html) {
+	return html.replace(/<([a-z0-9-]+)((?:\s[a-z0-9:_.-]+=".*?")+)((?:\s*\/)?>)/gi, (s, pre, attrs, after) => {
+		let list = attrs.match(/\s[a-z0-9:_.-]+=".*?"/gi).sort( (a, b) => a>b ? 1 : -1 );
+		if (~after.indexOf('/')) after = '></'+pre+'>';
+		return '<' + pre + list.join('') + after;
+	});
+}
+
+const Empty = () => null;
+
+describe('Components', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		let c = scratch.firstElementChild;
+		if (c) render(<Empty />, scratch, c);
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should render components', () => {
+		class C1 extends Component {
+			render() {
+				return <div>C1</div>;
+			}
+		}
+		sinon.spy(C1.prototype, 'render');
+		render(<C1 />, scratch);
+
+		expect(C1.prototype.render)
+			.to.have.been.calledOnce
+			.and.to.have.been.calledWithMatch({}, {})
+			.and.to.have.returned(sinon.match({ nodeName:'div' }));
+
+		expect(scratch.innerHTML).to.equal('<div>C1</div>');
+	});
+
+
+	it('should render functional components', () => {
+		const PROPS = { foo:'bar', onBaz:()=>{} };
+
+		const C3 = sinon.spy( props => <div {...props} /> );
+
+		render(<C3 {...PROPS} />, scratch);
+
+		expect(C3)
+			.to.have.been.calledOnce
+			.and.to.have.been.calledWith(PROPS)
+			.and.to.have.returned(sinon.match({
+				nodeName: 'div',
+				attributes: PROPS
+			}));
+
+		expect(scratch.innerHTML).to.equal('<div foo="bar"></div>');
+	});
+
+
+	it('should render components with props', () => {
+		const PROPS = { foo:'bar', onBaz:()=>{} };
+		let constructorProps;
+
+		class C2 extends Component {
+			constructor(props) {
+				super(props);
+				constructorProps = props;
+			}
+			render(props) {
+				return <div {...props} />;
+			}
+		}
+		sinon.spy(C2.prototype, 'render');
+
+		render(<C2 {...PROPS} />, scratch);
+
+		expect(constructorProps).to.deep.equal(PROPS);
+
+		expect(C2.prototype.render)
+			.to.have.been.calledOnce
+			.and.to.have.been.calledWithMatch(PROPS, {})
+			.and.to.have.returned(sinon.match({
+				nodeName: 'div',
+				attributes: PROPS
+			}));
+
+		expect(scratch.innerHTML).to.equal('<div foo="bar"></div>');
+	});
+
+
+	// Test for Issue #73
+	it('should remove orphaned elements replaced by Components', () => {
+		class Comp extends Component {
+			render() {
+				return <span>span in a component</span>;
+			}
+		}
+
+		let root;
+		function test(content) {
+			root = render(content, scratch, root);
+		}
+
+		test(<Comp />);
+		test(<div>just a div</div>);
+		test(<Comp />);
+
+		expect(scratch.innerHTML).to.equal('<span>span in a component</span>');
+	});
+
+
+	// Test for Issue #176
+	it('should remove children when root changes to text node', () => {
+		let comp;
+
+		class Comp extends Component {
+			render(_, { alt }) {
+				return alt ? 'asdf' : <div>test</div>;
+			}
+		}
+
+		render(<Comp ref={c=>comp=c} />, scratch);
+
+		comp.setState({ alt:true });
+		comp.forceUpdate();
+		expect(scratch.innerHTML, 'switching to textnode').to.equal('asdf');
+
+		comp.setState({ alt:false });
+		comp.forceUpdate();
+		expect(scratch.innerHTML, 'switching to element').to.equal('<div>test</div>');
+
+		comp.setState({ alt:true });
+		comp.forceUpdate();
+		expect(scratch.innerHTML, 'switching to textnode 2').to.equal('asdf');
+	});
+
+
+	describe('props.children', () => {
+		it('should support passing children as a prop', () => {
+			const Foo = props => <div {...props} />;
+
+			render(<Foo a="b" children={[
+				<span class="bar">bar</span>,
+				'123',
+				456
+			]} />, scratch);
+
+			expect(scratch.innerHTML).to.equal('<div a="b"><span class="bar">bar</span>123456</div>');
+		});
+
+		it('should be ignored when explicit children exist', () => {
+			const Foo = props => <div {...props}>a</div>;
+
+			render(<Foo children={'b'} />, scratch);
+
+			expect(scratch.innerHTML).to.equal('<div>a</div>');
+		});
+	});
+
+
+	describe('High-Order Components', () => {
+		it('should render nested functional components', () => {
+			const PROPS = { foo:'bar', onBaz:()=>{} };
+
+			const Outer = sinon.spy(
+				props => <Inner {...props} />
+			);
+
+			const Inner = sinon.spy(
+				props => <div {...props}>inner</div>
+			);
+
+			render(<Outer {...PROPS} />, scratch);
+
+			expect(Outer)
+				.to.have.been.calledOnce
+				.and.to.have.been.calledWith(PROPS)
+				.and.to.have.returned(sinon.match({
+					nodeName: Inner,
+					attributes: PROPS
+				}));
+
+			expect(Inner)
+				.to.have.been.calledOnce
+				.and.to.have.been.calledWith(PROPS)
+				.and.to.have.returned(sinon.match({
+					nodeName: 'div',
+					attributes: PROPS,
+					children: ['inner']
+				}));
+
+			expect(scratch.innerHTML).to.equal('<div foo="bar">inner</div>');
+		});
+
+		it('should re-render nested functional components', () => {
+			let doRender = null;
+			class Outer extends Component {
+				componentDidMount() {
+					let i = 1;
+					doRender = () => this.setState({ i: ++i });
+				}
+				componentWillUnmount() {}
+				render(props, { i }) {
+					return <Inner i={i} {...props} />;
+				}
+			}
+			sinon.spy(Outer.prototype, 'render');
+			sinon.spy(Outer.prototype, 'componentWillUnmount');
+
+			let j = 0;
+			const Inner = sinon.spy(
+				props => <div j={ ++j } {...props}>inner</div>
+			);
+
+			render(<Outer foo="bar" />, scratch);
+
+			// update & flush
+			doRender();
+			rerender();
+
+			expect(Outer.prototype.componentWillUnmount)
+				.not.to.have.been.called;
+
+			expect(Inner).to.have.been.calledTwice;
+
+			expect(Inner.secondCall)
+				.to.have.been.calledWith({ foo:'bar', i:2 })
+				.and.to.have.returned(sinon.match({
+					attributes: {
+						j: 2,
+						i: 2,
+						foo: 'bar'
+					}
+				}));
+
+			expect(getAttributes(scratch.firstElementChild)).to.eql({
+				j: '2',
+				i: '2',
+				foo: 'bar'
+			});
+
+			// update & flush
+			doRender();
+			rerender();
+
+			expect(Inner).to.have.been.calledThrice;
+
+			expect(Inner.thirdCall)
+				.to.have.been.calledWith({ foo:'bar', i:3 })
+				.and.to.have.returned(sinon.match({
+					attributes: {
+						j: 3,
+						i: 3,
+						foo: 'bar'
+					}
+				}));
+
+			expect(getAttributes(scratch.firstElementChild)).to.eql({
+				j: '3',
+				i: '3',
+				foo: 'bar'
+			});
+		});
+
+		it('should re-render nested components', () => {
+			let doRender = null,
+				alt = false;
+
+			class Outer extends Component {
+				componentDidMount() {
+					let i = 1;
+					doRender = () => this.setState({ i: ++i });
+				}
+				componentWillUnmount() {}
+				render(props, { i }) {
+					if (alt) return <div is-alt />;
+					return <Inner i={i} {...props} />;
+				}
+			}
+			sinon.spy(Outer.prototype, 'render');
+			sinon.spy(Outer.prototype, 'componentDidMount');
+			sinon.spy(Outer.prototype, 'componentWillUnmount');
+
+			let j = 0;
+			class Inner extends Component {
+				constructor(...args) {
+					super();
+					this._constructor(...args);
+				}
+				_constructor() {}
+				componentWillMount() {}
+				componentDidMount() {}
+				componentWillUnmount() {}
+				componentDidUnmount() {}
+				render(props) {
+					return <div j={ ++j } {...props}>inner</div>;
+				}
+			}
+			sinon.spy(Inner.prototype, '_constructor');
+			sinon.spy(Inner.prototype, 'render');
+			sinon.spy(Inner.prototype, 'componentWillMount');
+			sinon.spy(Inner.prototype, 'componentDidMount');
+			sinon.spy(Inner.prototype, 'componentDidUnmount');
+			sinon.spy(Inner.prototype, 'componentWillUnmount');
+
+			render(<Outer foo="bar" />, scratch);
+
+			expect(Outer.prototype.componentDidMount).to.have.been.calledOnce;
+
+			// update & flush
+			doRender();
+			rerender();
+
+			expect(Outer.prototype.componentWillUnmount).not.to.have.been.called;
+
+			expect(Inner.prototype._constructor).to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillUnmount).not.to.have.been.called;
+			expect(Inner.prototype.componentDidUnmount).not.to.have.been.called;
+			expect(Inner.prototype.componentWillMount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidMount).to.have.been.calledOnce;
+			expect(Inner.prototype.render).to.have.been.calledTwice;
+
+			expect(Inner.prototype.render.secondCall)
+				.to.have.been.calledWith({ foo:'bar', i:2 })
+				.and.to.have.returned(sinon.match({
+					attributes: {
+						j: 2,
+						i: 2,
+						foo: 'bar'
+					}
+				}));
+
+			expect(getAttributes(scratch.firstElementChild)).to.eql({
+				j: '2',
+				i: '2',
+				foo: 'bar'
+			});
+
+			expect(sortAttributes(scratch.innerHTML)).to.equal(sortAttributes('<div foo="bar" j="2" i="2">inner</div>'));
+
+			// update & flush
+			doRender();
+			rerender();
+
+			expect(Inner.prototype.componentWillUnmount).not.to.have.been.called;
+			expect(Inner.prototype.componentDidUnmount).not.to.have.been.called;
+			expect(Inner.prototype.componentWillMount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidMount).to.have.been.calledOnce;
+			expect(Inner.prototype.render).to.have.been.calledThrice;
+
+			expect(Inner.prototype.render.thirdCall)
+				.to.have.been.calledWith({ foo:'bar', i:3 })
+				.and.to.have.returned(sinon.match({
+					attributes: {
+						j: 3,
+						i: 3,
+						foo: 'bar'
+					}
+				}));
+
+			expect(getAttributes(scratch.firstElementChild)).to.eql({
+				j: '3',
+				i: '3',
+				foo: 'bar'
+			});
+
+
+			// update & flush
+			alt = true;
+			doRender();
+			rerender();
+
+			expect(Inner.prototype.componentWillUnmount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidUnmount).to.have.been.calledOnce;
+
+			expect(scratch.innerHTML).to.equal('<div is-alt="true"></div>');
+
+			// update & flush
+			alt = false;
+			doRender();
+			rerender();
+
+			expect(sortAttributes(scratch.innerHTML)).to.equal(sortAttributes('<div foo="bar" j="4" i="5">inner</div>'));
+		});
+
+		it('should resolve intermediary functional component', () => {
+			let ctx = {};
+			class Root extends Component {
+				getChildContext() {
+					return { ctx };
+				}
+				render() {
+					return <Func />;
+				}
+			}
+			const Func = sinon.spy( () => <Inner /> );
+			class Inner extends Component {
+				componentWillMount() {}
+				componentDidMount() {}
+				componentWillUnmount() {}
+				componentDidUnmount() {}
+				render() {
+					return <div>inner</div>;
+				}
+			}
+
+			spyAll(Inner.prototype);
+
+			let root = render(<Root />, scratch);
+
+			expect(Inner.prototype.componentWillMount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidMount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillMount).to.have.been.calledBefore(Inner.prototype.componentDidMount);
+
+			root = render(<asdf />, scratch, root);
+
+			expect(Inner.prototype.componentWillUnmount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidUnmount).to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillUnmount).to.have.been.calledBefore(Inner.prototype.componentDidUnmount);
+		});
+
+		it('should unmount children of high-order components without unmounting parent', () => {
+			let outer, inner2, counter=0;
+
+			class Outer extends Component {
+				constructor(props, context) {
+					super(props, context);
+					outer = this;
+					this.state = {
+						child: this.props.child
+					};
+				}
+				componentWillUnmount(){}
+				componentDidUnmount(){}
+				componentWillMount(){}
+				componentDidMount(){}
+				render(_, { child:C }) {
+					return <C />;
+				}
+			}
+			spyAll(Outer.prototype);
+
+			class Inner extends Component {
+				componentWillUnmount(){}
+				componentDidUnmount(){}
+				componentWillMount(){}
+				componentDidMount(){}
+				render() {
+					return h('element'+(++counter));
+				}
+			}
+			spyAll(Inner.prototype);
+
+			class Inner2 extends Component {
+				constructor(props, context) {
+					super(props, context);
+					inner2 = this;
+				}
+				componentWillUnmount(){}
+				componentDidUnmount(){}
+				componentWillMount(){}
+				componentDidMount(){}
+				render() {
+					return h('element'+(++counter));
+				}
+			}
+			spyAll(Inner2.prototype);
+
+			render(<Outer child={Inner} />, scratch);
+
+			// outer should only have been mounted once
+			expect(Outer.prototype.componentWillMount, 'outer initial').to.have.been.calledOnce;
+			expect(Outer.prototype.componentDidMount, 'outer initial').to.have.been.calledOnce;
+			expect(Outer.prototype.componentWillUnmount, 'outer initial').not.to.have.been.called;
+			expect(Outer.prototype.componentDidUnmount, 'outer initial').not.to.have.been.called;
+
+			// inner should only have been mounted once
+			expect(Inner.prototype.componentWillMount, 'inner initial').to.have.been.calledOnce;
+			expect(Inner.prototype.componentDidMount, 'inner initial').to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillUnmount, 'inner initial').not.to.have.been.called;
+			expect(Inner.prototype.componentDidUnmount, 'inner initial').not.to.have.been.called;
+
+			outer.setState({ child:Inner2 });
+			outer.forceUpdate();
+
+			expect(Inner2.prototype.render).to.have.been.calledOnce;
+
+			// outer should still only have been mounted once
+			expect(Outer.prototype.componentWillMount, 'outer swap').to.have.been.calledOnce;
+			expect(Outer.prototype.componentDidMount, 'outer swap').to.have.been.calledOnce;
+			expect(Outer.prototype.componentWillUnmount, 'outer swap').not.to.have.been.called;
+			expect(Outer.prototype.componentDidUnmount, 'outer swap').not.to.have.been.called;
+
+			// inner should only have been mounted once
+			expect(Inner2.prototype.componentWillMount, 'inner2 swap').to.have.been.calledOnce;
+			expect(Inner2.prototype.componentDidMount, 'inner2 swap').to.have.been.calledOnce;
+			expect(Inner2.prototype.componentWillUnmount, 'inner2 swap').not.to.have.been.called;
+			expect(Inner2.prototype.componentDidUnmount, 'inner2 swap').not.to.have.been.called;
+
+			inner2.forceUpdate();
+
+			expect(Inner2.prototype.render, 'inner2 update').to.have.been.calledTwice;
+			expect(Inner2.prototype.componentWillMount, 'inner2 update').to.have.been.calledOnce;
+			expect(Inner2.prototype.componentDidMount, 'inner2 update').to.have.been.calledOnce;
+			expect(Inner2.prototype.componentWillUnmount, 'inner2 update').not.to.have.been.called;
+			expect(Inner2.prototype.componentDidUnmount, 'inner2 update').not.to.have.been.called;
+		});
+
+		it('should remount when swapping between HOC child types', () => {
+			class Outer extends Component {
+				render({ child: Child }) {
+					return <Child />;
+				}
+			}
+
+			class Inner extends Component {
+				componentWillMount() {}
+				componentWillUnmount() {}
+				render() {
+					return <div class="inner">foo</div>;
+				}
+			}
+			spyAll(Inner.prototype);
+
+			const InnerFunc = () => (
+				<div class="inner-func">bar</div>
+			);
+
+			let root = render(<Outer child={Inner} />, scratch, root);
+
+			expect(Inner.prototype.componentWillMount, 'initial mount').to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillUnmount, 'initial mount').not.to.have.been.called;
+
+			Inner.prototype.componentWillMount.reset();
+			root = render(<Outer child={InnerFunc} />, scratch, root);
+
+			expect(Inner.prototype.componentWillMount, 'unmount').not.to.have.been.called;
+			expect(Inner.prototype.componentWillUnmount, 'unmount').to.have.been.calledOnce;
+
+			Inner.prototype.componentWillUnmount.reset();
+			root = render(<Outer child={Inner} />, scratch, root);
+
+			expect(Inner.prototype.componentWillMount, 'remount').to.have.been.calledOnce;
+			expect(Inner.prototype.componentWillUnmount, 'remount').not.to.have.been.called;
+		});
+	});
+
+	describe('Component Nesting', () => {
+		let useIntermediary = false;
+
+		let createComponent = (Intermediary) => {
+			class C extends Component {
+				componentWillMount() {}
+				componentDidUnmount() {}
+				render({ children }) {
+					if (!useIntermediary) return children[0];
+					let I = useIntermediary===true ? Intermediary : useIntermediary;
+					return <I>{children}</I>;
+				}
+			}
+			spyAll(C.prototype);
+			return C;
+		};
+
+		let createFunction = () => sinon.spy( ({ children }) => children[0] );
+
+		let root;
+		let rndr = n => root = render(n, scratch, root);
+
+		let F1 = createFunction();
+		let F2 = createFunction();
+		let F3 = createFunction();
+
+		let C1 = createComponent(F1);
+		let C2 = createComponent(F2);
+		let C3 = createComponent(F3);
+
+		let reset = () => [C1, C2, C3].reduce(
+			(acc, c) => acc.concat( Object.keys(c.prototype).map(key => c.prototype[key]) ),
+			[F1, F2, F3]
+		).forEach( c => c.reset && c.reset() );
+
+
+		it('should handle lifecycle for no intermediary in component tree', () => {
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'initial mount').to.have.been.calledOnce;
+			expect(C2.prototype.componentWillMount, 'initial mount').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'initial mount').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2>Some Text</C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'unmount innermost, C1').not.to.have.been.called;
+			expect(C2.prototype.componentWillMount, 'unmount innermost, C2').not.to.have.been.called;
+			expect(C3.prototype.componentDidUnmount, 'unmount innermost, C3').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C3>Some Text</C3></C1>);
+
+			expect(C1.prototype.componentWillMount, 'swap innermost').not.to.have.been.called;
+			expect(C2.prototype.componentDidUnmount, 'swap innermost').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'swap innermost').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentDidUnmount, 'inject between, C1').not.to.have.been.called;
+			expect(C1.prototype.componentWillMount, 'inject between, C1').not.to.have.been.called;
+			expect(C2.prototype.componentWillMount, 'inject between, C2').to.have.been.calledOnce;
+			expect(C3.prototype.componentDidUnmount, 'inject between, C3').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'inject between, C3').to.have.been.calledOnce;
+		});
+
+
+		it('should handle lifecycle for nested intermediary functional components', () => {
+			useIntermediary = true;
+
+			rndr(<div />);
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'initial mount w/ intermediary fn, C1').to.have.been.calledOnce;
+			expect(C2.prototype.componentWillMount, 'initial mount w/ intermediary fn, C2').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'initial mount w/ intermediary fn, C3').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2>Some Text</C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'unmount innermost w/ intermediary fn, C1').not.to.have.been.called;
+			expect(C2.prototype.componentWillMount, 'unmount innermost w/ intermediary fn, C2').not.to.have.been.called;
+			expect(C3.prototype.componentDidUnmount, 'unmount innermost w/ intermediary fn, C3').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C3>Some Text</C3></C1>);
+
+			expect(C1.prototype.componentWillMount, 'swap innermost w/ intermediary fn').not.to.have.been.called;
+			expect(C2.prototype.componentDidUnmount, 'swap innermost w/ intermediary fn').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'swap innermost w/ intermediary fn').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentDidUnmount, 'inject between, C1 w/ intermediary fn').not.to.have.been.called;
+			expect(C1.prototype.componentWillMount, 'inject between, C1 w/ intermediary fn').not.to.have.been.called;
+			expect(C2.prototype.componentWillMount, 'inject between, C2 w/ intermediary fn').to.have.been.calledOnce;
+			expect(C3.prototype.componentDidUnmount, 'inject between, C3 w/ intermediary fn').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'inject between, C3 w/ intermediary fn').to.have.been.calledOnce;
+		});
+
+
+		it('should handle lifecycle for nested intermediary elements', () => {
+			useIntermediary = 'div';
+
+			rndr(<div />);
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'initial mount w/ intermediary div, C1').to.have.been.calledOnce;
+			expect(C2.prototype.componentWillMount, 'initial mount w/ intermediary div, C2').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'initial mount w/ intermediary div, C3').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2>Some Text</C2></C1>);
+
+			expect(C1.prototype.componentWillMount, 'unmount innermost w/ intermediary div, C1').not.to.have.been.called;
+			expect(C2.prototype.componentDidUnmount, 'unmount innermost w/ intermediary div, C2 ummount').not.to.have.been.called;
+			// @TODO this was just incorrect?
+			// expect(C2.prototype.componentWillMount, 'unmount innermost w/ intermediary div, C2').not.to.have.been.called;
+			expect(C3.prototype.componentDidUnmount, 'unmount innermost w/ intermediary div, C3').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C3>Some Text</C3></C1>);
+
+			expect(C1.prototype.componentWillMount, 'swap innermost w/ intermediary div').not.to.have.been.called;
+			expect(C2.prototype.componentDidUnmount, 'swap innermost w/ intermediary div').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'swap innermost w/ intermediary div').to.have.been.calledOnce;
+
+			reset();
+			rndr(<C1><C2><C3>Some Text</C3></C2></C1>);
+
+			expect(C1.prototype.componentDidUnmount, 'inject between, C1 w/ intermediary div').not.to.have.been.called;
+			expect(C1.prototype.componentWillMount, 'inject between, C1 w/ intermediary div').not.to.have.been.called;
+			expect(C2.prototype.componentWillMount, 'inject between, C2 w/ intermediary div').to.have.been.calledOnce;
+			expect(C3.prototype.componentDidUnmount, 'inject between, C3 w/ intermediary div').to.have.been.calledOnce;
+			expect(C3.prototype.componentWillMount, 'inject between, C3 w/ intermediary div').to.have.been.calledOnce;
+		});
+	});
+});
diff --git a/thirdparty/preact/test/browser/context.js b/thirdparty/preact/test/browser/context.js
new file mode 100644
index 000000000..e62a948a4
--- /dev/null
+++ b/thirdparty/preact/test/browser/context.js
@@ -0,0 +1,170 @@
+import { h, render, Component } from '../../src/preact';
+/** @jsx h */
+
+describe('context', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should pass context to grandchildren', () => {
+		const CONTEXT = { a:'a' };
+		const PROPS = { b:'b' };
+		// let inner;
+
+		class Outer extends Component {
+			getChildContext() {
+				return CONTEXT;
+			}
+			render(props) {
+				return <div><Inner {...props} /></div>;
+			}
+		}
+		sinon.spy(Outer.prototype, 'getChildContext');
+
+		class Inner extends Component {
+			// constructor() {
+			// 	super();
+			// 	inner = this;
+			// }
+			shouldComponentUpdate() { return true; }
+			componentWillReceiveProps() {}
+			componentWillUpdate() {}
+			componentDidUpdate() {}
+			render(props, state, context) {
+				return <div>{ context && context.a }</div>;
+			}
+		}
+		sinon.spy(Inner.prototype, 'shouldComponentUpdate');
+		sinon.spy(Inner.prototype, 'componentWillReceiveProps');
+		sinon.spy(Inner.prototype, 'componentWillUpdate');
+		sinon.spy(Inner.prototype, 'componentDidUpdate');
+		sinon.spy(Inner.prototype, 'render');
+
+		render(<Outer />, scratch, scratch.lastChild);
+
+		expect(Outer.prototype.getChildContext).to.have.been.calledOnce;
+
+		// initial render does not invoke anything but render():
+		expect(Inner.prototype.render).to.have.been.calledWith({}, {}, CONTEXT);
+
+		CONTEXT.foo = 'bar';
+		render(<Outer {...PROPS} />, scratch, scratch.lastChild);
+
+		expect(Outer.prototype.getChildContext).to.have.been.calledTwice;
+
+		expect(Inner.prototype.shouldComponentUpdate).to.have.been.calledOnce.and.calledWith(PROPS, {}, CONTEXT);
+		expect(Inner.prototype.componentWillReceiveProps).to.have.been.calledWith(PROPS, CONTEXT);
+		expect(Inner.prototype.componentWillUpdate).to.have.been.calledWith(PROPS, {});
+		expect(Inner.prototype.componentDidUpdate).to.have.been.calledWith({}, {});
+		expect(Inner.prototype.render).to.have.been.calledWith(PROPS, {}, CONTEXT);
+
+
+		/* Future:
+		 *  Newly created context objects are *not* currently cloned.
+		 *  This test checks that they *are* cloned.
+		 */
+		// Inner.prototype.render.reset();
+		// CONTEXT.foo = 'baz';
+		// inner.forceUpdate();
+		// expect(Inner.prototype.render).to.have.been.calledWith(PROPS, {}, { a:'a', foo:'bar' });
+	});
+
+	it('should pass context to direct children', () => {
+		const CONTEXT = { a:'a' };
+		const PROPS = { b:'b' };
+
+		class Outer extends Component {
+			getChildContext() {
+				return CONTEXT;
+			}
+			render(props) {
+				return <Inner {...props} />;
+			}
+		}
+		sinon.spy(Outer.prototype, 'getChildContext');
+
+		class Inner extends Component {
+			shouldComponentUpdate() { return true; }
+			componentWillReceiveProps() {}
+			componentWillUpdate() {}
+			componentDidUpdate() {}
+			render(props, state, context) {
+				return <div>{ context && context.a }</div>;
+			}
+		}
+		sinon.spy(Inner.prototype, 'shouldComponentUpdate');
+		sinon.spy(Inner.prototype, 'componentWillReceiveProps');
+		sinon.spy(Inner.prototype, 'componentWillUpdate');
+		sinon.spy(Inner.prototype, 'componentDidUpdate');
+		sinon.spy(Inner.prototype, 'render');
+
+		render(<Outer />, scratch, scratch.lastChild);
+
+		expect(Outer.prototype.getChildContext).to.have.been.calledOnce;
+
+		// initial render does not invoke anything but render():
+		expect(Inner.prototype.render).to.have.been.calledWith({}, {}, CONTEXT);
+
+		CONTEXT.foo = 'bar';
+		render(<Outer {...PROPS} />, scratch, scratch.lastChild);
+
+		expect(Outer.prototype.getChildContext).to.have.been.calledTwice;
+
+		expect(Inner.prototype.shouldComponentUpdate).to.have.been.calledOnce.and.calledWith(PROPS, {}, CONTEXT);
+		expect(Inner.prototype.componentWillReceiveProps).to.have.been.calledWith(PROPS, CONTEXT);
+		expect(Inner.prototype.componentWillUpdate).to.have.been.calledWith(PROPS, {});
+		expect(Inner.prototype.componentDidUpdate).to.have.been.calledWith({}, {});
+		expect(Inner.prototype.render).to.have.been.calledWith(PROPS, {}, CONTEXT);
+
+		// make sure render() could make use of context.a
+		expect(Inner.prototype.render).to.have.returned(sinon.match({ children:['a'] }));
+	});
+
+	it('should preserve existing context properties when creating child contexts', () => {
+		let outerContext = { outer:true },
+			innerContext = { inner:true };
+		class Outer extends Component {
+			getChildContext() {
+				return { outerContext };
+			}
+			render() {
+				return <div><Inner /></div>;
+			}
+		}
+
+		class Inner extends Component {
+			getChildContext() {
+				return { innerContext };
+			}
+			render() {
+				return <InnerMost />;
+			}
+		}
+
+		class InnerMost extends Component {
+			render() {
+				return <strong>test</strong>;
+			}
+		}
+
+		sinon.spy(Inner.prototype, 'render');
+		sinon.spy(InnerMost.prototype, 'render');
+
+		render(<Outer />, scratch);
+
+		expect(Inner.prototype.render).to.have.been.calledWith({}, {}, { outerContext });
+		expect(InnerMost.prototype.render).to.have.been.calledWith({}, {}, { outerContext, innerContext });
+	});
+});
diff --git a/thirdparty/preact/test/browser/keys.js b/thirdparty/preact/test/browser/keys.js
new file mode 100644
index 000000000..e0a6b9ae8
--- /dev/null
+++ b/thirdparty/preact/test/browser/keys.js
@@ -0,0 +1,85 @@
+import { h, Component, render } from '../../src/preact';
+/** @jsx h */
+
+describe('keys', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	// See developit/preact-compat#21
+	it('should remove orphaned keyed nodes', () => {
+		let root = render((
+			<div>
+				<div>1</div>
+				<li key="a">a</li>
+			</div>
+		), scratch);
+
+		root = render((
+			<div>
+				<div>2</div>
+				<li key="b">b</li>
+			</div>
+		), scratch, root);
+
+		expect(scratch.innerHTML).to.equal('<div><div>2</div><li>b</li></div>');
+	});
+
+	it('should set VNode#key property', () => {
+		expect(<div />).to.have.property('key').that.is.empty;
+		expect(<div a="a" />).to.have.property('key').that.is.empty;
+		expect(<div key="1" />).to.have.property('key', '1');
+	});
+
+	it('should remove keyed nodes (#232)', () => {
+		class App extends Component {
+			componentDidMount() {
+				setTimeout(() => this.setState({opened: true,loading: true}), 10);
+				setTimeout(() => this.setState({opened: true,loading: false}), 20);
+			}
+
+			render({ opened, loading }) {
+				return (
+					<BusyIndicator id="app" busy={loading}>
+						<div>This div needs to be here for this to break</div>
+						{ opened && !loading && <div>{[]}</div> }
+					</BusyIndicator>
+				);
+			}
+		}
+
+		class BusyIndicator extends Component {
+			render({ children, busy }) {
+				return <div class={busy ? "busy" : ""}>
+					{ children && children.length ? children : <div class="busy-placeholder"></div> }
+					<div class="indicator">
+						<div>indicator</div>
+						<div>indicator</div>
+						<div>indicator</div>
+					</div>
+				</div>;
+			}
+		}
+
+		let root;
+
+		root = render(<App />, scratch, root);
+		root = render(<App opened loading />, scratch, root);
+		root = render(<App opened />, scratch, root);
+
+		let html = String(root.innerHTML).replace(/ class=""/g, '');
+		expect(html).to.equal('<div>This div needs to be here for this to break</div><div></div><div class="indicator"><div>indicator</div><div>indicator</div><div>indicator</div></div>');
+	});
+});
diff --git a/thirdparty/preact/test/browser/lifecycle.js b/thirdparty/preact/test/browser/lifecycle.js
new file mode 100644
index 000000000..d6204ca8f
--- /dev/null
+++ b/thirdparty/preact/test/browser/lifecycle.js
@@ -0,0 +1,493 @@
+import { h, render, rerender, Component } from '../../src/preact';
+/** @jsx h */
+
+let spyAll = obj => Object.keys(obj).forEach( key => sinon.spy(obj,key) );
+
+describe('Lifecycle methods', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+
+	describe('#componentWillUpdate', () => {
+		it('should NOT be called on initial render', () => {
+			class ReceivePropsComponent extends Component {
+				componentWillUpdate() {}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(ReceivePropsComponent.prototype, 'componentWillUpdate');
+			render(<ReceivePropsComponent />, scratch);
+			expect(ReceivePropsComponent.prototype.componentWillUpdate).not.to.have.been.called;
+		});
+
+		it('should be called when rerender with new props from parent', () => {
+			let doRender;
+			class Outer extends Component {
+				constructor(p, c) {
+					super(p, c);
+					this.state = { i: 0 };
+				}
+				componentDidMount() {
+					doRender = () => this.setState({ i: this.state.i + 1 });
+				}
+				render(props, { i }) {
+					return <Inner i={i} {...props} />;
+				}
+			}
+			class Inner extends Component {
+				componentWillUpdate(nextProps, nextState) {
+					expect(nextProps).to.be.deep.equal({i: 1});
+					expect(nextState).to.be.deep.equal({});
+				}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(Inner.prototype, 'componentWillUpdate');
+			sinon.spy(Outer.prototype, 'componentDidMount');
+
+			// Initial render
+			render(<Outer />, scratch);
+			expect(Inner.prototype.componentWillUpdate).not.to.have.been.called;
+
+			// Rerender inner with new props
+			doRender();
+			rerender();
+			expect(Inner.prototype.componentWillUpdate).to.have.been.called;
+		});
+
+		it('should be called on new state', () => {
+			let doRender;
+			class ReceivePropsComponent extends Component {
+				componentWillUpdate() {}
+				componentDidMount() {
+					doRender = () => this.setState({ i: this.state.i + 1 });
+				}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(ReceivePropsComponent.prototype, 'componentWillUpdate');
+			render(<ReceivePropsComponent />, scratch);
+			expect(ReceivePropsComponent.prototype.componentWillUpdate).not.to.have.been.called;
+
+			doRender();
+			rerender();
+			expect(ReceivePropsComponent.prototype.componentWillUpdate).to.have.been.called;
+		});
+	});
+
+	describe('#componentWillReceiveProps', () => {
+		it('should NOT be called on initial render', () => {
+			class ReceivePropsComponent extends Component {
+				componentWillReceiveProps() {}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(ReceivePropsComponent.prototype, 'componentWillReceiveProps');
+			render(<ReceivePropsComponent />, scratch);
+			expect(ReceivePropsComponent.prototype.componentWillReceiveProps).not.to.have.been.called;
+		});
+
+		it('should be called when rerender with new props from parent', () => {
+			let doRender;
+			class Outer extends Component {
+				constructor(p, c) {
+					super(p, c);
+					this.state = { i: 0 };
+				}
+				componentDidMount() {
+					doRender = () => this.setState({ i: this.state.i + 1 });
+				}
+				render(props, { i }) {
+					return <Inner i={i} {...props} />;
+				}
+			}
+			class Inner extends Component {
+				componentWillMount() {
+					expect(this.props.i).to.be.equal(0);
+				}
+				componentWillReceiveProps(nextProps) {
+					expect(nextProps.i).to.be.equal(1);
+				}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(Inner.prototype, 'componentWillReceiveProps');
+			sinon.spy(Outer.prototype, 'componentDidMount');
+
+			// Initial render
+			render(<Outer />, scratch);
+			expect(Inner.prototype.componentWillReceiveProps).not.to.have.been.called;
+
+			// Rerender inner with new props
+			doRender();
+			rerender();
+			expect(Inner.prototype.componentWillReceiveProps).to.have.been.called;
+		});
+
+		it('should be called in right execution order', () => {
+			let doRender;
+			class Outer extends Component {
+				constructor(p, c) {
+					super(p, c);
+					this.state = { i: 0 };
+				}
+				componentDidMount() {
+					doRender = () => this.setState({ i: this.state.i + 1 });
+				}
+				render(props, { i }) {
+					return <Inner i={i} {...props} />;
+				}
+			}
+			class Inner extends Component {
+				componentDidUpdate() {
+					expect(Inner.prototype.componentWillReceiveProps).to.have.been.called;
+					expect(Inner.prototype.componentWillUpdate).to.have.been.called;
+				}
+				componentWillReceiveProps() {
+					expect(Inner.prototype.componentWillUpdate).not.to.have.been.called;
+					expect(Inner.prototype.componentDidUpdate).not.to.have.been.called;
+				}
+				componentWillUpdate() {
+					expect(Inner.prototype.componentWillReceiveProps).to.have.been.called;
+					expect(Inner.prototype.componentDidUpdate).not.to.have.been.called;
+				}
+				render() {
+					return <div />;
+				}
+			}
+			sinon.spy(Inner.prototype, 'componentWillReceiveProps');
+			sinon.spy(Inner.prototype, 'componentDidUpdate');
+			sinon.spy(Inner.prototype, 'componentWillUpdate');
+			sinon.spy(Outer.prototype, 'componentDidMount');
+
+			render(<Outer />, scratch);
+			doRender();
+			rerender();
+
+			expect(Inner.prototype.componentWillReceiveProps).to.have.been.calledBefore(Inner.prototype.componentWillUpdate);
+			expect(Inner.prototype.componentWillUpdate).to.have.been.calledBefore(Inner.prototype.componentDidUpdate);
+		});
+	});
+
+
+	let _it = it;
+	describe('#constructor and component(Did|Will)(Mount|Unmount)', () => {
+		/* global DISABLE_FLAKEY */
+		let it = DISABLE_FLAKEY ? xit : _it;
+
+		let setState;
+		class Outer extends Component {
+			constructor(p, c) {
+				super(p, c);
+				this.state = { show:true };
+				setState = s => this.setState(s);
+			}
+			render(props, { show }) {
+				return (
+					<div>
+						{ show && (
+							<Inner {...props} />
+						) }
+					</div>
+				);
+			}
+		}
+
+		class LifecycleTestComponent extends Component {
+			constructor(p, c) { super(p, c); this._constructor(); }
+			_constructor() {}
+			componentWillMount() {}
+			componentDidMount() {}
+			componentWillUnmount() {}
+			componentDidUnmount() {}
+			render() { return <div />; }
+		}
+
+		class Inner extends LifecycleTestComponent {
+			render() {
+				return (
+					<div>
+						<InnerMost />
+					</div>
+				);
+			}
+		}
+
+		class InnerMost extends LifecycleTestComponent {
+			render() { return <div />; }
+		}
+
+		let spies = ['_constructor', 'componentWillMount', 'componentDidMount', 'componentWillUnmount', 'componentDidUnmount'];
+
+		let verifyLifycycleMethods = (TestComponent) => {
+			let proto = TestComponent.prototype;
+			spies.forEach( s => sinon.spy(proto, s) );
+			let reset = () => spies.forEach( s => proto[s].reset() );
+
+			it('should be invoked for components on initial render', () => {
+				reset();
+				render(<Outer />, scratch);
+				expect(proto._constructor).to.have.been.called;
+				expect(proto.componentDidMount).to.have.been.called;
+				expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+				expect(proto.componentDidMount).to.have.been.called;
+			});
+
+			it('should be invoked for components on unmount', () => {
+				reset();
+				setState({ show:false });
+				rerender();
+
+				expect(proto.componentDidUnmount).to.have.been.called;
+				expect(proto.componentWillUnmount).to.have.been.calledBefore(proto.componentDidUnmount);
+				expect(proto.componentDidUnmount).to.have.been.called;
+			});
+
+			it('should be invoked for components on re-render', () => {
+				reset();
+				setState({ show:true });
+				rerender();
+
+				expect(proto._constructor).to.have.been.called;
+				expect(proto.componentDidMount).to.have.been.called;
+				expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+				expect(proto.componentDidMount).to.have.been.called;
+			});
+		};
+
+		describe('inner components', () => {
+			verifyLifycycleMethods(Inner);
+		});
+
+		describe('innermost components', () => {
+			verifyLifycycleMethods(InnerMost);
+		});
+
+		describe('when shouldComponentUpdate() returns false', () => {
+			let setState;
+
+			class Outer extends Component {
+				constructor() {
+					super();
+					this.state = { show:true };
+					setState = s => this.setState(s);
+				}
+				render(props, { show }) {
+					return (
+						<div>
+							{ show && (
+								<div>
+									<Inner {...props} />
+								</div>
+							) }
+						</div>
+					);
+				}
+			}
+
+			class Inner extends Component {
+				shouldComponentUpdate(){ return false; }
+				componentWillMount() {}
+				componentDidMount() {}
+				componentWillUnmount() {}
+				componentDidUnmount() {}
+				render() {
+					return <div />;
+				}
+			}
+
+			let proto = Inner.prototype;
+			let spies = ['componentWillMount', 'componentDidMount', 'componentWillUnmount', 'componentDidUnmount'];
+			spies.forEach( s => sinon.spy(proto, s) );
+
+			let reset = () => spies.forEach( s => proto[s].reset() );
+
+			beforeEach( () => reset() );
+
+			it('should be invoke normally on initial mount', () => {
+				render(<Outer />, scratch);
+				expect(proto.componentWillMount).to.have.been.called;
+				expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+				expect(proto.componentDidMount).to.have.been.called;
+			});
+
+			it('should be invoked normally on unmount', () => {
+				setState({ show:false });
+				rerender();
+
+				expect(proto.componentWillUnmount).to.have.been.called;
+				expect(proto.componentWillUnmount).to.have.been.calledBefore(proto.componentDidUnmount);
+				expect(proto.componentDidUnmount).to.have.been.called;
+			});
+
+			it('should still invoke mount for shouldComponentUpdate():false', () => {
+				setState({ show:true });
+				rerender();
+
+				expect(proto.componentWillMount).to.have.been.called;
+				expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+				expect(proto.componentDidMount).to.have.been.called;
+			});
+
+			it('should still invoke unmount for shouldComponentUpdate():false', () => {
+				setState({ show:false });
+				rerender();
+
+				expect(proto.componentWillUnmount).to.have.been.called;
+				expect(proto.componentWillUnmount).to.have.been.calledBefore(proto.componentDidUnmount);
+				expect(proto.componentDidUnmount).to.have.been.called;
+			});
+		});
+	});
+
+	describe('Lifecycle DOM Timing', () => {
+		it('should be invoked when dom does (DidMount, WillUnmount) or does not (WillMount, DidUnmount) exist', () => {
+			let setState;
+			class Outer extends Component {
+				constructor() {
+					super();
+					this.state = { show:true };
+					setState = s => {
+						this.setState(s);
+						this.forceUpdate();
+					};
+				}
+				componentWillMount() {
+					expect(document.getElementById('OuterDiv'), 'Outer componentWillMount').to.not.exist;
+				}
+				componentDidMount() {
+					expect(document.getElementById('OuterDiv'), 'Outer componentDidMount').to.exist;
+				}
+				componentWillUnmount() {
+					expect(document.getElementById('OuterDiv'), 'Outer componentWillUnmount').to.exist;
+				}
+				componentDidUnmount() {
+					expect(document.getElementById('OuterDiv'), 'Outer componentDidUnmount').to.not.exist;
+				}
+				render(props, { show }) {
+					return (
+						<div id="OuterDiv">
+							{ show && (
+								<div>
+									<Inner {...props} />
+								</div>
+							) }
+						</div>
+					);
+				}
+			}
+
+			class Inner extends Component {
+				componentWillMount() {
+					expect(document.getElementById('InnerDiv'), 'Inner componentWillMount').to.not.exist;
+				}
+				componentDidMount() {
+					expect(document.getElementById('InnerDiv'), 'Inner componentDidMount').to.exist;
+				}
+				componentWillUnmount() {
+					// @TODO Component mounted into elements (non-components)
+					// are currently unmounted after those elements, so their
+					// DOM is unmounted prior to the method being called.
+					//expect(document.getElementById('InnerDiv'), 'Inner componentWillUnmount').to.exist;
+				}
+				componentDidUnmount() {
+					expect(document.getElementById('InnerDiv'), 'Inner componentDidUnmount').to.not.exist;
+				}
+
+				render() {
+					return <div id="InnerDiv" />;
+				}
+			}
+
+			let proto = Inner.prototype;
+			let spies = ['componentWillMount', 'componentDidMount', 'componentWillUnmount', 'componentDidUnmount'];
+			spies.forEach( s => sinon.spy(proto, s) );
+
+			let reset = () => spies.forEach( s => proto[s].reset() );
+
+			render(<Outer />, scratch);
+			expect(proto.componentWillMount).to.have.been.called;
+			expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+			expect(proto.componentDidMount).to.have.been.called;
+
+			reset();
+			setState({ show:false });
+
+			expect(proto.componentWillUnmount).to.have.been.called;
+			expect(proto.componentWillUnmount).to.have.been.calledBefore(proto.componentDidUnmount);
+			expect(proto.componentDidUnmount).to.have.been.called;
+
+			reset();
+			setState({ show:true });
+
+			expect(proto.componentWillMount).to.have.been.called;
+			expect(proto.componentWillMount).to.have.been.calledBefore(proto.componentDidMount);
+			expect(proto.componentDidMount).to.have.been.called;
+		});
+
+		it('should remove this.base for HOC', () => {
+			let createComponent = (name, fn) => {
+				class C extends Component {
+					componentWillUnmount() {
+						expect(this.base, `${name}.componentWillUnmount`).to.exist;
+					}
+					componentDidUnmount() {
+						expect(this.base, `${name}.componentDidUnmount`).not.to.exist;
+					}
+					render(props) { return fn(props); }
+				}
+				spyAll(C.prototype);
+				return C;
+			};
+
+			class Wrapper extends Component {
+				render({ children }) {
+					return <div class="wrapper">{children}</div>;
+				}
+			}
+
+			let One = createComponent('One', () => <Wrapper>one</Wrapper> );
+			let Two = createComponent('Two', () => <Wrapper>two</Wrapper> );
+			let Three = createComponent('Three', () => <Wrapper>three</Wrapper> );
+
+			let components = [One, Two, Three];
+
+			let Selector = createComponent('Selector', ({ page }) => {
+				let Child = components[page];
+				return <Child />;
+			});
+
+			class App extends Component {
+				render(_, { page }) {
+					return <Selector page={page} />;
+				}
+			}
+
+			let app;
+			render(<App ref={ c => app=c } />, scratch);
+
+			for (let i=0; i<20; i++) {
+				app.setState({ page: i%components.length });
+				app.forceUpdate();
+			}
+		});
+	});
+});
diff --git a/thirdparty/preact/test/browser/linked-state.js b/thirdparty/preact/test/browser/linked-state.js
new file mode 100644
index 000000000..1ca84cdc6
--- /dev/null
+++ b/thirdparty/preact/test/browser/linked-state.js
@@ -0,0 +1,98 @@
+import { Component } from '../../src/preact';
+import { createLinkedState } from '../../src/linked-state';
+
+describe('linked-state', () => {
+	class TestComponent extends Component {	}
+	let testComponent, linkFunction;
+
+	before( () => {
+		testComponent = new TestComponent();
+		sinon.spy(TestComponent.prototype, 'setState');
+	});
+
+	describe('createLinkedState without eventPath argument', () => {
+
+		before( () => {
+			linkFunction = createLinkedState(testComponent,'testStateKey');
+			expect(linkFunction).to.be.a('function');
+		});
+
+		beforeEach( () => {
+			TestComponent.prototype['setState'].reset();
+		});
+
+		it('should use value attribute on text input when no eventPath is supplied', () => {
+			let element = document.createElement('input');
+			element.type= 'text';
+			element.value = 'newValue';
+
+			linkFunction({ currentTarget: element });
+
+			expect(TestComponent.prototype.setState).to.have.been.calledOnce;
+			expect(TestComponent.prototype.setState).to.have.been.calledWith({'testStateKey': 'newValue'});
+
+			linkFunction.call(element);
+
+			expect(TestComponent.prototype.setState).to.have.been.calledTwice;
+			expect(TestComponent.prototype.setState.secondCall).to.have.been.calledWith({'testStateKey': 'newValue'});
+		});
+
+		it('should use checked attribute on checkbox input when no eventPath is supplied', () => {
+			let checkboxElement = document.createElement('input');
+			checkboxElement.type= 'checkbox';
+			checkboxElement.checked = true;
+
+			linkFunction({ currentTarget: checkboxElement });
+
+			expect(TestComponent.prototype.setState).to.have.been.calledOnce;
+			expect(TestComponent.prototype.setState).to.have.been.calledWith({'testStateKey': true});
+		});
+
+		it('should use checked attribute on radio input when no eventPath is supplied', () => {
+			let radioElement = document.createElement('input');
+			radioElement.type= 'radio';
+			radioElement.checked = true;
+
+			linkFunction({ currentTarget: radioElement });
+
+			expect(TestComponent.prototype.setState).to.have.been.calledOnce;
+			expect(TestComponent.prototype.setState).to.have.been.calledWith({'testStateKey': true});
+		});
+
+
+		it('should set dot notated state key appropriately', () => {
+			linkFunction = createLinkedState(testComponent,'nested.state.key');
+			let element = document.createElement('input');
+			element.type= 'text';
+			element.value = 'newValue';
+
+			linkFunction({ currentTarget: element });
+
+			expect(TestComponent.prototype.setState).to.have.been.calledOnce;
+			expect(TestComponent.prototype.setState).to.have.been.calledWith({nested: {state: {key: 'newValue'}}});
+		});
+
+	});
+
+	describe('createLinkedState with eventPath argument', () => {
+
+		before( () => {
+			linkFunction = createLinkedState(testComponent,'testStateKey', 'nested.path');
+			expect(linkFunction).to.be.a('function');
+		});
+
+		beforeEach( () => {
+			TestComponent.prototype['setState'].reset();
+		});
+
+		it('should give precedence to nested.path on event over nested.path on component', () => {
+			let event = {nested: {path: 'nestedPathValueFromEvent'}};
+			let component = {_component: {nested: {path: 'nestedPathValueFromComponent'}}};
+
+			linkFunction.call(component, event);
+
+			expect(TestComponent.prototype.setState).to.have.been.calledOnce;
+			expect(TestComponent.prototype.setState).to.have.been.calledWith({'testStateKey': 'nestedPathValueFromEvent'});
+		});
+	});
+});
diff --git a/thirdparty/preact/test/browser/performance.js b/thirdparty/preact/test/browser/performance.js
new file mode 100644
index 000000000..e1f7d7956
--- /dev/null
+++ b/thirdparty/preact/test/browser/performance.js
@@ -0,0 +1,245 @@
+/*global coverage, ENABLE_PERFORMANCE, NODE_ENV*/
+/*eslint no-console:0*/
+/** @jsx h */
+
+let { h, Component, render } = require(NODE_ENV==='production' ? '../../dist/preact.min.js' : '../../src/preact');
+
+const MULTIPLIER = ENABLE_PERFORMANCE ? (coverage ? 5 : 1) : 999999;
+
+
+let now = typeof performance!=='undefined' && performance.now ? () => performance.now() : () => +new Date();
+
+function loop(iter, time) {
+	let start = now(),
+		count = 0;
+	while ( now()-start < time ) {
+		count++;
+		iter();
+	}
+	return count;
+}
+
+
+function benchmark(iter, callback) {
+	let a = 0;
+	function noop() {
+		try { a++; } finally { a += Math.random(); }
+	}
+
+	// warm
+	for (let i=3; i--; ) noop(), iter();
+
+	let count = 5,
+		time = 200,
+		passes = 0,
+		noops = loop(noop, time),
+		iterations = 0;
+
+	function next() {
+		iterations += loop(iter, time);
+		setTimeout(++passes===count ? done : next, 10);
+	}
+
+	function done() {
+		let ticks = Math.round(noops / iterations * count),
+			hz = iterations / count / time * 1000,
+			message = `${hz|0}/s (${ticks} ticks)`;
+		callback({ iterations, noops, count, time, ticks, hz, message });
+	}
+
+	next();
+}
+
+
+describe('performance', function() {
+	let scratch;
+
+	this.timeout(10000);
+
+	before( () => {
+		if (coverage) {
+			console.warn('WARNING: Code coverage is enabled, which dramatically reduces performance. Do not pay attention to these numbers.');
+		}
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should rerender without changes fast', done => {
+		let jsx = (
+			<div class="foo bar" data-foo="bar" p={2}>
+				<header>
+					<h1 class="asdf">a {'b'} c {0} d</h1>
+					<nav>
+						<a href="/foo">Foo</a>
+						<a href="/bar">Bar</a>
+					</nav>
+				</header>
+				<main>
+					<form onSubmit={()=>{}}>
+						<input type="checkbox" checked={true} />
+						<input type="checkbox" checked={false} />
+						<fieldset>
+							<label><input type="radio" checked /></label>
+							<label><input type="radio" /></label>
+						</fieldset>
+						<button-bar>
+							<button style="width:10px; height:10px; border:1px solid #FFF;">Normal CSS</button>
+							<button style="top:0 ; right: 20">Poor CSS</button>
+							<button style="invalid-prop:1;padding:1px;font:12px/1.1 arial,sans-serif;" icon>Poorer CSS</button>
+							<button style={{ margin:0, padding:'10px', overflow:'visible' }}>Object CSS</button>
+						</button-bar>
+					</form>
+				</main>
+			</div>
+		);
+
+		let root;
+		benchmark( () => {
+			root = render(jsx, scratch, root);
+		}, ({ ticks, message }) => {
+			console.log(`PERF: empty diff: ${message}`);
+			expect(ticks).to.be.below(350 * MULTIPLIER);
+			done();
+		});
+	});
+
+	it('should rerender repeated trees fast', done => {
+		class Header extends Component {
+			render() {
+				return (
+					<header>
+						<h1 class="asdf">a {'b'} c {0} d</h1>
+						<nav>
+							<a href="/foo">Foo</a>
+							<a href="/bar">Bar</a>
+						</nav>
+					</header>
+				);
+			}
+		}
+		class Form extends Component {
+			render() {
+				return (
+					<form onSubmit={()=>{}}>
+						<input type="checkbox" checked={true} />
+						<input type="checkbox" checked={false} />
+						<fieldset>
+							<label><input type="radio" checked /></label>
+							<label><input type="radio" /></label>
+						</fieldset>
+						<ButtonBar />
+					</form>
+				);
+			}
+		}
+		class ButtonBar extends Component {
+			render() {
+				return (
+					<button-bar>
+						<Button style="width:10px; height:10px; border:1px solid #FFF;">Normal CSS</Button>
+						<Button style="top:0 ; right: 20">Poor CSS</Button>
+						<Button style="invalid-prop:1;padding:1px;font:12px/1.1 arial,sans-serif;" icon>Poorer CSS</Button>
+						<Button style={{ margin:0, padding:'10px', overflow:'visible' }}>Object CSS</Button>
+					</button-bar>
+				);
+			}
+		}
+		class Button extends Component {
+			render(props) {
+				return <button {...props} />;
+			}
+		}
+		class Main extends Component {
+			render() {
+				return <Form />;
+			}
+		}
+		class Root extends Component {
+			render() {
+				return (
+					<div class="foo bar" data-foo="bar" p={2}>
+						<Header />
+						<Main />
+					</div>
+				);
+			}
+		}
+		class Empty extends Component {
+			render() {
+				return <div />;
+			}
+		}
+		class Parent extends Component {
+			render({ child:C }) {
+				return <C />;
+			}
+		}
+
+		let root;
+		benchmark( () => {
+			root = render(<Parent child={Root} />, scratch, root);
+			root = render(<Parent child={Empty} />, scratch, root);
+		}, ({ ticks, message }) => {
+			console.log(`PERF: repeat diff: ${message}`);
+			expect(ticks).to.be.below(2000 * MULTIPLIER);
+			done();
+		});
+	});
+
+	it('should construct large VDOM trees fast', done => {
+		const FIELDS = [];
+		for (let i=100; i--; ) FIELDS.push((i*999).toString(36));
+
+		let out = [];
+		function digest(vnode) {
+			out.push(vnode);
+			out.length = 0;
+		}
+		benchmark( () => {
+			digest(
+				<div class="foo bar" data-foo="bar" p={2}>
+					<header>
+						<h1 class="asdf">a {'b'} c {0} d</h1>
+						<nav>
+							<a href="/foo">Foo</a>
+							<a href="/bar">Bar</a>
+						</nav>
+					</header>
+					<main>
+						<form onSubmit={()=>{}}>
+							<input type="checkbox" checked />
+							<input type="checkbox" />
+							<fieldset>
+								{ FIELDS.map( field => (
+									<label>
+										{field}:
+										<input placeholder={field} />
+									</label>
+								)) }
+							</fieldset>
+							<button-bar>
+								<button style="width:10px; height:10px; border:1px solid #FFF;">Normal CSS</button>
+								<button style="top:0 ; right: 20">Poor CSS</button>
+								<button style="invalid-prop:1;padding:1px;font:12px/1.1 arial,sans-serif;" icon>Poorer CSS</button>
+								<button style={{ margin:0, padding:'10px', overflow:'visible' }}>Object CSS</button>
+							</button-bar>
+						</form>
+					</main>
+				</div>
+			);
+		}, ({ ticks, message }) => {
+			console.log(`PERF: large VTree: ${message}`);
+			expect(ticks).to.be.below(2000 * MULTIPLIER);
+			done();
+		});
+	});
+});
diff --git a/thirdparty/preact/test/browser/refs.js b/thirdparty/preact/test/browser/refs.js
new file mode 100644
index 000000000..89678b76e
--- /dev/null
+++ b/thirdparty/preact/test/browser/refs.js
@@ -0,0 +1,287 @@
+import { h, render, Component } from '../../src/preact';
+/** @jsx h */
+
+// gives call count and argument errors names (otherwise sinon just uses "spy"):
+let spy = (name, ...args) => {
+	let spy = sinon.spy(...args);
+	spy.displayName = `spy('${name}')`;
+	return spy;
+};
+
+describe('refs', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should invoke refs in render()', () => {
+		let ref = spy('ref');
+		render(<div ref={ref} />, scratch);
+		expect(ref).to.have.been.calledOnce.and.calledWith(scratch.firstChild);
+	});
+
+	it('should invoke refs in Component.render()', () => {
+		let outer = spy('outer'),
+			inner = spy('inner');
+		class Foo extends Component {
+			render() {
+				return (
+					<div ref={outer}>
+						<span ref={inner} />
+					</div>
+				);
+			}
+		}
+		render(<Foo />, scratch);
+
+		expect(outer).to.have.been.calledWith(scratch.firstChild);
+		expect(inner).to.have.been.calledWith(scratch.firstChild.firstChild);
+	});
+
+	it('should pass components to ref functions', () => {
+		let ref = spy('ref'),
+			instance;
+		class Foo extends Component {
+			constructor() {
+				super();
+				instance = this;
+			}
+			render() {
+				return <div />;
+			}
+		}
+		render(<Foo ref={ref} />, scratch);
+
+		expect(ref).to.have.been.calledOnce.and.calledWith(instance);
+	});
+
+	it('should pass rendered DOM from functional components to ref functions', () => {
+		let ref = spy('ref');
+
+		const Foo = () => <div />;
+
+		let root = render(<Foo ref={ref} />, scratch);
+		expect(ref).to.have.been.calledOnce.and.calledWith(scratch.firstChild);
+
+		ref.reset();
+		render(<Foo ref={ref} />, scratch, root);
+		expect(ref).to.have.been.calledOnce.and.calledWith(scratch.firstChild);
+
+		ref.reset();
+		render(<span />, scratch, root);
+		expect(ref).to.have.been.calledOnce.and.calledWith(null);
+	});
+
+	it('should pass children to ref functions', () => {
+		let outer = spy('outer'),
+			inner = spy('inner'),
+			rerender, inst;
+		class Outer extends Component {
+			constructor() {
+				super();
+				rerender = () => this.forceUpdate();
+			}
+			render() {
+				return (
+					<div>
+						<Inner ref={outer} />
+					</div>
+				);
+			}
+		}
+		class Inner extends Component {
+			constructor() {
+				super();
+				inst = this;
+			}
+			render() {
+				return <span ref={inner} />;
+			}
+		}
+
+		let root = render(<Outer />, scratch);
+
+		expect(outer).to.have.been.calledOnce.and.calledWith(inst);
+		expect(inner).to.have.been.calledOnce.and.calledWith(inst.base);
+
+		outer.reset();
+		inner.reset();
+
+		rerender();
+
+		expect(outer).to.have.been.calledOnce.and.calledWith(inst);
+		expect(inner).to.have.been.calledOnce.and.calledWith(inst.base);
+
+		outer.reset();
+		inner.reset();
+
+		render(<div />, scratch, root);
+
+		expect(outer).to.have.been.calledOnce.and.calledWith(null);
+		expect(inner).to.have.been.calledOnce.and.calledWith(null);
+	});
+
+	it('should pass high-order children to ref functions', () => {
+		let outer = spy('outer'),
+			inner = spy('inner'),
+			innermost = spy('innermost'),
+			outerInst,
+			innerInst;
+		class Outer extends Component {
+			constructor() {
+				super();
+				outerInst = this;
+			}
+			render() {
+				return <Inner ref={inner} />;
+			}
+		}
+		class Inner extends Component {
+			constructor() {
+				super();
+				innerInst = this;
+			}
+			render() {
+				return <span ref={innermost} />;
+			}
+		}
+
+		let root = render(<Outer ref={outer} />, scratch);
+
+		expect(outer, 'outer initial').to.have.been.calledOnce.and.calledWith(outerInst);
+		expect(inner, 'inner initial').to.have.been.calledOnce.and.calledWith(innerInst);
+		expect(innermost, 'innerMost initial').to.have.been.calledOnce.and.calledWith(innerInst.base);
+
+		outer.reset();
+		inner.reset();
+		innermost.reset();
+		root = render(<Outer ref={outer} />, scratch, root);
+
+		expect(outer, 'outer update').to.have.been.calledOnce.and.calledWith(outerInst);
+		expect(inner, 'inner update').to.have.been.calledOnce.and.calledWith(innerInst);
+		expect(innermost, 'innerMost update').to.have.been.calledOnce.and.calledWith(innerInst.base);
+
+		outer.reset();
+		inner.reset();
+		innermost.reset();
+		root = render(<div />, scratch, root);
+
+		expect(outer, 'outer unmount').to.have.been.calledOnce.and.calledWith(null);
+		expect(inner, 'inner unmount').to.have.been.calledOnce.and.calledWith(null);
+		expect(innermost, 'innerMost unmount').to.have.been.calledOnce.and.calledWith(null);
+	});
+
+	it('should not pass ref into component as a prop', () => {
+		let foo = spy('foo'),
+			bar = spy('bar');
+
+		class Foo extends Component {
+			render(){ return <div />; }
+		}
+		const Bar = spy('Bar', () => <div />);
+
+		sinon.spy(Foo.prototype, 'render');
+
+		render((
+			<div>
+				<Foo ref={foo} a="a" />
+				<Bar ref={bar} b="b" />
+			</div>
+		), scratch);
+
+		expect(Foo.prototype.render).to.have.been.calledWithExactly({ a:'a' }, { }, { });
+		expect(Bar).to.have.been.calledWithExactly({ b:'b', ref:bar }, { });
+	});
+
+	// Test for #232
+	it('should only null refs after unmount', () => {
+		let root, outer, inner;
+
+		class TestUnmount extends Component {
+			componentWillUnmount() {
+				expect(this).to.have.property('outer', outer);
+				expect(this).to.have.property('inner', inner);
+			}
+
+			componentDidUnmount() {
+				expect(this).to.have.property('outer', null);
+				expect(this).to.have.property('inner', null);
+			}
+
+			render() {
+				return (
+					<div id="outer" ref={ c => this.outer=c }>
+						<div id="inner" ref={ c => this.inner=c } />
+					</div>
+				);
+			}
+		}
+
+		sinon.spy(TestUnmount.prototype, 'componentWillUnmount');
+		sinon.spy(TestUnmount.prototype, 'componentDidUnmount');
+
+		root = render(<div><TestUnmount /></div>, scratch, root);
+		outer = scratch.querySelector('#outer');
+		inner = scratch.querySelector('#inner');
+
+		expect(TestUnmount.prototype.componentWillUnmount).not.to.have.been.called;
+		expect(TestUnmount.prototype.componentDidUnmount).not.to.have.been.called;
+
+		root = render(<div />, scratch, root);
+
+		expect(TestUnmount.prototype.componentWillUnmount).to.have.been.calledOnce;
+		expect(TestUnmount.prototype.componentDidUnmount).to.have.been.calledOnce;
+	});
+
+	it('should null and re-invoke refs when swapping component root element type', () => {
+		let inst;
+
+		class App extends Component {
+			render() {
+				return <div><Child /></div>;
+			}
+		}
+
+		class Child extends Component {
+			constructor(props, context) {
+				super(props, context);
+				this.state = { show:false };
+				inst = this;
+			}
+			handleMount(){}
+			render(_, { show }) {
+				if (!show) return <div id="div" ref={this.handleMount}></div>;
+				return <span id="span" ref={this.handleMount}>some test content</span>;
+			}
+		}
+		sinon.spy(Child.prototype, 'handleMount');
+
+		render(<App />, scratch);
+		expect(inst.handleMount).to.have.been.calledOnce.and.calledWith(scratch.querySelector('#div'));
+		inst.handleMount.reset();
+
+		inst.setState({ show:true });
+		inst.forceUpdate();
+		expect(inst.handleMount).to.have.been.calledTwice;
+		expect(inst.handleMount.firstCall).to.have.been.calledWith(null);
+		expect(inst.handleMount.secondCall).to.have.been.calledWith(scratch.querySelector('#span'));
+		inst.handleMount.reset();
+
+		inst.setState({ show:false });
+		inst.forceUpdate();
+		expect(inst.handleMount).to.have.been.calledTwice;
+		expect(inst.handleMount.firstCall).to.have.been.calledWith(null);
+		expect(inst.handleMount.secondCall).to.have.been.calledWith(scratch.querySelector('#div'));
+	});
+});
diff --git a/thirdparty/preact/test/browser/render.js b/thirdparty/preact/test/browser/render.js
new file mode 100644
index 000000000..5d18fb282
--- /dev/null
+++ b/thirdparty/preact/test/browser/render.js
@@ -0,0 +1,439 @@
+/* global DISABLE_FLAKEY */
+
+import { h, render } from '../../src/preact';
+/** @jsx h */
+
+function getAttributes(node) {
+	let attrs = {};
+	for (let i=node.attributes.length; i--; ) {
+		attrs[node.attributes[i].name] = node.attributes[i].value;
+	}
+	return attrs;
+}
+
+// hacky normalization of attribute order across browsers.
+function sortAttributes(html) {
+	return html.replace(/<([a-z0-9-]+)((?:\s[a-z0-9:_.-]+=".*?")+)((?:\s*\/)?>)/gi, (s, pre, attrs, after) => {
+		let list = attrs.match(/\s[a-z0-9:_.-]+=".*?"/gi).sort( (a, b) => a>b ? 1 : -1 );
+		if (~after.indexOf('/')) after = '></'+pre+'>';
+		return '<' + pre + list.join('') + after;
+	});
+}
+
+describe('render()', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should create empty nodes (<* />)', () => {
+		render(<div />, scratch);
+		expect(scratch.childNodes)
+			.to.have.length(1)
+			.and.to.have.deep.property('0.nodeName', 'DIV');
+
+		scratch.innerHTML = '';
+
+		render(<span />, scratch);
+		expect(scratch.childNodes)
+			.to.have.length(1)
+			.and.to.have.deep.property('0.nodeName', 'SPAN');
+
+		scratch.innerHTML = '';
+
+		render(<foo />, scratch);
+		render(<x-bar />, scratch);
+		expect(scratch.childNodes).to.have.length(2);
+		expect(scratch.childNodes[0]).to.have.property('nodeName', 'FOO');
+		expect(scratch.childNodes[1]).to.have.property('nodeName', 'X-BAR');
+	});
+
+	it('should nest empty nodes', () => {
+		render((
+			<div>
+				<span />
+				<foo />
+				<x-bar />
+			</div>
+		), scratch);
+
+		expect(scratch.childNodes)
+			.to.have.length(1)
+			.and.to.have.deep.property('0.nodeName', 'DIV');
+
+		let c = scratch.childNodes[0].childNodes;
+		expect(c).to.have.length(3);
+		expect(c).to.have.deep.property('0.nodeName', 'SPAN');
+		expect(c).to.have.deep.property('1.nodeName', 'FOO');
+		expect(c).to.have.deep.property('2.nodeName', 'X-BAR');
+	});
+
+	it('should not render falsey values', () => {
+		render((
+			<div>
+				{null},{undefined},{false},{0},{NaN}
+			</div>
+		), scratch);
+
+		expect(scratch.firstChild).to.have.property('innerHTML', ',,,0,NaN');
+	});
+
+	it('should clear falsey attributes', () => {
+		let root = render((
+			<div anull="anull" aundefined="aundefined" afalse="afalse" anan="aNaN" a0="a0" />
+		), scratch);
+
+		root = render((
+			<div anull={null} aundefined={undefined} afalse={false} anan={NaN} a0={0} />
+		), scratch, root);
+
+		expect(getAttributes(scratch.firstChild), 'from previous truthy values').to.eql({
+			a0: '0',
+			anan: 'NaN'
+		});
+
+		scratch.innerHTML = '';
+
+		root = render((
+			<div anull={null} aundefined={undefined} afalse={false} anan={NaN} a0={0} />
+		), scratch);
+
+		expect(getAttributes(scratch.firstChild), 'initial render').to.eql({
+			a0: '0',
+			anan: 'NaN'
+		});
+	});
+
+	it('should clear falsey input values', () => {
+		let root = render((
+			<div>
+				<input value={0} />
+				<input value={false} />
+				<input value={null} />
+				<input value={undefined} />
+			</div>
+		), scratch);
+
+		expect(root.children[0]).to.have.property('value', '0');
+		expect(root.children[1]).to.have.property('value', 'false');
+		expect(root.children[2]).to.have.property('value', '');
+		expect(root.children[3]).to.have.property('value', '');
+	});
+
+	it('should clear falsey DOM properties', () => {
+		let root;
+		function test(val) {
+			root = render((
+				<div>
+					<input value={val} />
+					<table border={val} />
+				</div>
+			), scratch, root);
+		}
+
+		test('2');
+		test(false);
+		expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for false');
+
+		test('3');
+		test(null);
+		expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for null');
+
+		test('4');
+		test(undefined);
+		expect(scratch).to.have.property('innerHTML', '<div><input><table></table></div>', 'for undefined');
+	});
+
+	it('should apply string attributes', () => {
+		render(<div foo="bar" data-foo="databar" />, scratch);
+
+		let div = scratch.childNodes[0];
+		expect(div).to.have.deep.property('attributes.length', 2);
+
+		expect(div).to.have.deep.property('attributes[0].name', 'foo');
+		expect(div).to.have.deep.property('attributes[0].value', 'bar');
+
+		expect(div).to.have.deep.property('attributes[1].name', 'data-foo');
+		expect(div).to.have.deep.property('attributes[1].value', 'databar');
+	});
+
+	it('should apply class as String', () => {
+		render(<div class="foo" />, scratch);
+		expect(scratch.childNodes[0]).to.have.property('className', 'foo');
+	});
+
+	it('should alias className to class', () => {
+		render(<div className="bar" />, scratch);
+		expect(scratch.childNodes[0]).to.have.property('className', 'bar');
+	});
+
+	it('should apply style as String', () => {
+		render(<div style="top:5px; position:relative;" />, scratch);
+		expect(scratch.childNodes[0]).to.have.deep.property('style.cssText')
+			.that.matches(/top\s*:\s*5px\s*/)
+			.and.matches(/position\s*:\s*relative\s*/);
+	});
+
+	it('should only register on* functions as handlers', () => {
+		let click = () => {},
+			onclick = () => {};
+
+		let proto = document.createElement('div').constructor.prototype;
+
+		sinon.spy(proto, 'addEventListener');
+
+		render(<div click={ click } onClick={ onclick } />, scratch);
+
+		expect(scratch.childNodes[0]).to.have.deep.property('attributes.length', 0);
+
+		expect(proto.addEventListener).to.have.been.calledOnce
+			.and.to.have.been.calledWithExactly('click', sinon.match.func, false);
+
+		proto.addEventListener.restore();
+	});
+
+	it('should add and remove event handlers', () => {
+		let click = sinon.spy(),
+			mousedown = sinon.spy();
+
+		let proto = document.createElement('div').constructor.prototype;
+		sinon.spy(proto, 'addEventListener');
+		sinon.spy(proto, 'removeEventListener');
+
+		function fireEvent(on, type) {
+			let e = document.createEvent('Event');
+			e.initEvent(type, true, true);
+			on.dispatchEvent(e);
+		}
+
+		render(<div onClick={ () => click(1) } onMouseDown={ mousedown } />, scratch);
+
+		expect(proto.addEventListener).to.have.been.calledTwice
+			.and.to.have.been.calledWith('click')
+			.and.calledWith('mousedown');
+
+		fireEvent(scratch.childNodes[0], 'click');
+		expect(click).to.have.been.calledOnce
+			.and.calledWith(1);
+
+		proto.addEventListener.reset();
+		click.reset();
+
+		render(<div onClick={ () => click(2) } />, scratch, scratch.firstChild);
+
+		expect(proto.addEventListener).not.to.have.been.called;
+
+		expect(proto.removeEventListener)
+			.to.have.been.calledOnce
+			.and.calledWith('mousedown');
+
+		fireEvent(scratch.childNodes[0], 'click');
+		expect(click).to.have.been.calledOnce
+			.and.to.have.been.calledWith(2);
+
+		fireEvent(scratch.childNodes[0], 'mousedown');
+		expect(mousedown).not.to.have.been.called;
+
+		proto.removeEventListener.reset();
+		click.reset();
+		mousedown.reset();
+
+		render(<div />, scratch, scratch.firstChild);
+
+		expect(proto.removeEventListener)
+			.to.have.been.calledOnce
+			.and.calledWith('click');
+
+		fireEvent(scratch.childNodes[0], 'click');
+		expect(click).not.to.have.been.called;
+
+		proto.addEventListener.restore();
+		proto.removeEventListener.restore();
+	});
+
+	it('should use capturing for events that do not bubble', () => {
+		let click = sinon.spy(),
+			focus = sinon.spy();
+
+		let root = render((
+			<div onClick={click} onFocus={focus}>
+				<button />
+			</div>
+		), scratch);
+
+		root.firstElementChild.click();
+		root.firstElementChild.focus();
+
+		expect(click, 'click').to.have.been.calledOnce;
+
+		if (DISABLE_FLAKEY!==true) {
+			// Focus delegation requires a 50b hack I'm not sure we want to incur
+			expect(focus, 'focus').to.have.been.calledOnce;
+
+			// IE doesn't set it
+			expect(click).to.have.been.calledWithMatch({ eventPhase: 0 });		// capturing
+			expect(focus).to.have.been.calledWithMatch({ eventPhase: 0 });		// capturing
+		}
+	});
+
+	it('should serialize style objects', () => {
+		let root = render((
+			<div style={{
+				color: 'rgb(255, 255, 255)',
+				background: 'rgb(255, 100, 0)',
+				backgroundPosition: '10px 10px',
+				'background-size': 'cover',
+				padding: 5,
+				top: 100,
+				left: '100%'
+			}}>
+				test
+			</div>
+		), scratch);
+
+		let { style } = scratch.childNodes[0];
+		expect(style).to.have.property('color').that.equals('rgb(255, 255, 255)');
+		expect(style).to.have.property('background').that.contains('rgb(255, 100, 0)');
+		expect(style).to.have.property('backgroundPosition').that.equals('10px 10px');
+		expect(style).to.have.property('backgroundSize', 'cover');
+		expect(style).to.have.property('padding', '5px');
+		expect(style).to.have.property('top', '100px');
+		expect(style).to.have.property('left', '100%');
+
+		root = render((
+			<div style={{ color: 'rgb(0, 255, 255)' }}>test</div>
+		), scratch, root);
+
+		expect(root).to.have.deep.property('style.cssText').that.equals('color: rgb(0, 255, 255);');
+
+		root = render((
+			<div style="display: inline;">test</div>
+		), scratch, root);
+
+		expect(root).to.have.deep.property('style.cssText').that.equals('display: inline;');
+
+		root = render((
+			<div style={{ backgroundColor: 'rgb(0, 255, 255)' }}>test</div>
+		), scratch, root);
+
+		expect(root).to.have.deep.property('style.cssText').that.equals('background-color: rgb(0, 255, 255);');
+	});
+
+	it('should serialize class/className', () => {
+		render(<div class={{
+			no1: false,
+			no2: 0,
+			no3: null,
+			no4: undefined,
+			no5: '',
+			yes1: true,
+			yes2: 1,
+			yes3: {},
+			yes4: [],
+			yes5: ' '
+		}} />, scratch);
+
+		let { className } = scratch.childNodes[0];
+		expect(className).to.be.a.string;
+		expect(className.split(' '))
+			.to.include.members(['yes1', 'yes2', 'yes3', 'yes4', 'yes5'])
+			.and.not.include.members(['no1', 'no2', 'no3', 'no4', 'no5']);
+	});
+
+	it('should support dangerouslySetInnerHTML', () => {
+		let html = '<b>foo &amp; bar</b>';
+		let root = render(<div dangerouslySetInnerHTML={{ __html: html }} />, scratch);
+
+		expect(scratch.firstChild).to.have.property('innerHTML', html);
+		expect(scratch.innerHTML).to.equal('<div>'+html+'</div>');
+
+		root = render(<div>a<strong>b</strong></div>, scratch, root);
+
+		expect(scratch).to.have.property('innerHTML', `<div>a<strong>b</strong></div>`);
+
+		root = render(<div dangerouslySetInnerHTML={{ __html: html }} />, scratch, root);
+
+		expect(scratch.innerHTML).to.equal('<div>'+html+'</div>');
+	});
+
+	it('should reconcile mutated DOM attributes', () => {
+		let check = p => render(<input type="checkbox" checked={p} />, scratch, scratch.lastChild),
+			value = () => scratch.lastChild.checked,
+			setValue = p => scratch.lastChild.checked = p;
+		check(true);
+		expect(value()).to.equal(true);
+		check(false);
+		expect(value()).to.equal(false);
+		check(true);
+		expect(value()).to.equal(true);
+		setValue(true);
+		check(false);
+		expect(value()).to.equal(false);
+		setValue(false);
+		check(true);
+		expect(value()).to.equal(true);
+	});
+
+	it('should ignore props.children if children are manually specified', () => {
+		expect(
+			<div a children={['a', 'b']}>c</div>
+		).to.eql(
+			<div a>c</div>
+		);
+	});
+
+	it('should reorder child pairs', () => {
+		let root = render((
+			<div>
+				<a>a</a>
+				<b>b</b>
+			</div>
+		), scratch, root);
+
+		let a = scratch.firstChild.firstChild;
+		let b = scratch.firstChild.lastChild;
+
+		expect(a).to.have.property('nodeName', 'A');
+		expect(b).to.have.property('nodeName', 'B');
+
+		root = render((
+			<div>
+				<b>b</b>
+				<a>a</a>
+			</div>
+		), scratch, root);
+
+		expect(scratch.firstChild.firstChild).to.have.property('nodeName', 'B');
+		expect(scratch.firstChild.lastChild).to.have.property('nodeName', 'A');
+		expect(scratch.firstChild.firstChild).to.equal(b);
+		expect(scratch.firstChild.lastChild).to.equal(a);
+	});
+
+	// Discussion: https://github.com/developit/preact/issues/287
+	('HTMLDataListElement' in window ? it : xit)('should allow <input list /> to pass through as an attribute', () => {
+		render((
+			<div>
+				<input type="range" min="0" max="100" list="steplist" />
+				<datalist id="steplist">
+					<option>0</option>
+					<option>50</option>
+					<option>100</option>
+				</datalist>
+			</div>
+		), scratch);
+
+		let html = scratch.firstElementChild.firstElementChild.outerHTML;
+		expect(sortAttributes(html)).to.equal(sortAttributes('<input type="range" min="0" max="100" list="steplist">'));
+	});
+});
diff --git a/thirdparty/preact/test/browser/spec.js b/thirdparty/preact/test/browser/spec.js
new file mode 100644
index 000000000..eb48151f0
--- /dev/null
+++ b/thirdparty/preact/test/browser/spec.js
@@ -0,0 +1,124 @@
+import { h, render, rerender, Component } from '../../src/preact';
+/** @jsx h */
+
+describe('Component spec', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	describe('defaultProps', () => {
+		it('should apply default props on initial render', () => {
+			class WithDefaultProps extends Component {
+				constructor(props, context) {
+					super(props, context);
+					expect(props).to.be.deep.equal({
+						fieldA: 1, fieldB: 2,
+						fieldC: 1, fieldD: 2
+					});
+				}
+				render() {
+					return <div />;
+				}
+			}
+			WithDefaultProps.defaultProps = { fieldC: 1, fieldD: 1 };
+			render(<WithDefaultProps fieldA={1} fieldB={2} fieldD={2} />, scratch);
+		});
+
+		it('should apply default props on rerender', () => {
+			let doRender;
+			class Outer extends Component {
+				constructor() {
+					super();
+					this.state = { i:1 };
+				}
+				componentDidMount() {
+					doRender = () => this.setState({ i: 2 });
+				}
+				render(props, { i }) {
+					return <WithDefaultProps fieldA={1} fieldB={i} fieldD={i} />;
+				}
+			}
+			class WithDefaultProps extends Component {
+				constructor(props, context) {
+					super(props, context);
+					this.ctor(props, context);
+				}
+				ctor(){}
+				componentWillReceiveProps() {}
+				render() {
+					return <div />;
+				}
+			}
+			WithDefaultProps.defaultProps = { fieldC: 1, fieldD: 1 };
+
+			let proto = WithDefaultProps.prototype;
+			sinon.spy(proto, 'ctor');
+			sinon.spy(proto, 'componentWillReceiveProps');
+			sinon.spy(proto, 'render');
+
+			render(<Outer />, scratch);
+			doRender();
+
+			const PROPS1 = {
+				fieldA: 1, fieldB: 1,
+				fieldC: 1, fieldD: 1
+			};
+
+			const PROPS2 = {
+				fieldA: 1, fieldB: 2,
+				fieldC: 1, fieldD: 2
+			};
+
+			expect(proto.ctor).to.have.been.calledWith(PROPS1);
+			expect(proto.render).to.have.been.calledWith(PROPS1);
+
+			rerender();
+
+			// expect(proto.ctor).to.have.been.calledWith(PROPS2);
+			expect(proto.componentWillReceiveProps).to.have.been.calledWith(PROPS2);
+			expect(proto.render).to.have.been.calledWith(PROPS2);
+		});
+
+		// @TODO: migrate this to preact-compat
+		xit('should cache default props', () => {
+			class WithDefaultProps extends Component {
+				constructor(props, context) {
+					super(props, context);
+					expect(props).to.be.deep.equal({
+						fieldA: 1, fieldB: 2,
+						fieldC: 1, fieldD: 2,
+						fieldX: 10
+					});
+				}
+				getDefaultProps() {
+					return { fieldA: 1, fieldB: 1 };
+				}
+				render() {
+					return <div />;
+				}
+			}
+			WithDefaultProps.defaultProps = { fieldC: 1, fieldD: 1 };
+			sinon.spy(WithDefaultProps.prototype, 'getDefaultProps');
+			render((
+				<div>
+					<WithDefaultProps fieldB={2} fieldD={2} fieldX={10} />
+					<WithDefaultProps fieldB={2} fieldD={2} fieldX={10} />
+					<WithDefaultProps fieldB={2} fieldD={2} fieldX={10} />
+				</div>
+			), scratch);
+			expect(WithDefaultProps.prototype.getDefaultProps).to.be.calledOnce;
+		});
+	});
+});
diff --git a/thirdparty/preact/test/browser/svg.js b/thirdparty/preact/test/browser/svg.js
new file mode 100644
index 000000000..684f4dd96
--- /dev/null
+++ b/thirdparty/preact/test/browser/svg.js
@@ -0,0 +1,112 @@
+import { h, render } from '../../src/preact';
+/** @jsx h */
+
+
+// hacky normalization of attribute order across browsers.
+function sortAttributes(html) {
+	return html.replace(/<([a-z0-9-]+)((?:\s[a-z0-9:_.-]+=".*?")+)((?:\s*\/)?>)/gi, (s, pre, attrs, after) => {
+		let list = attrs.match(/\s[a-z0-9:_.-]+=".*?"/gi).sort( (a, b) => a>b ? 1 : -1 );
+		if (~after.indexOf('/')) after = '></'+pre+'>';
+		return '<' + pre + list.join('') + after;
+	});
+}
+
+
+describe('svg', () => {
+	let scratch;
+
+	before( () => {
+		scratch = document.createElement('div');
+		(document.body || document.documentElement).appendChild(scratch);
+	});
+
+	beforeEach( () => {
+		scratch.innerHTML = '';
+	});
+
+	after( () => {
+		scratch.parentNode.removeChild(scratch);
+		scratch = null;
+	});
+
+	it('should render SVG to string', () => {
+		render((
+			<svg viewBox="0 0 360 360">
+				<path stroke="white" fill="black" d="M 347.1 357.9 L 183.3 256.5 L 13 357.9 V 1.7 h 334.1 v 356.2 Z M 58.5 47.2 v 231.4 l 124.8 -74.1 l 118.3 72.8 V 47.2 H 58.5 Z" />
+			</svg>
+		), scratch);
+
+		let html = sortAttributes(String(scratch.innerHTML).replace(' xmlns="http://www.w3.org/2000/svg"', ''));
+		expect(html).to.equal(sortAttributes(`
+			<svg viewBox="0 0 360 360">
+				<path d="M 347.1 357.9 L 183.3 256.5 L 13 357.9 V 1.7 h 334.1 v 356.2 Z M 58.5 47.2 v 231.4 l 124.8 -74.1 l 118.3 72.8 V 47.2 H 58.5 Z" fill="black" stroke="white"></path>
+			</svg>
+		`.replace(/[\n\t]+/g,'')));
+	});
+
+	it('should render SVG to DOM', () => {
+		const Demo = () => (
+			<svg viewBox="0 0 360 360">
+				<path d="M 347.1 357.9 L 183.3 256.5 L 13 357.9 V 1.7 h 334.1 v 356.2 Z M 58.5 47.2 v 231.4 l 124.8 -74.1 l 118.3 72.8 V 47.2 H 58.5 Z" fill="black" stroke="white" />
+			</svg>
+		);
+		render(<Demo />, scratch);
+
+		let html = sortAttributes(String(scratch.innerHTML).replace(' xmlns="http://www.w3.org/2000/svg"', ''));
+		expect(html).to.equal(sortAttributes('<svg viewBox="0 0 360 360"><path stroke="white" fill="black" d="M 347.1 357.9 L 183.3 256.5 L 13 357.9 V 1.7 h 334.1 v 356.2 Z M 58.5 47.2 v 231.4 l 124.8 -74.1 l 118.3 72.8 V 47.2 H 58.5 Z"></path></svg>'));
+	});
+
+	it('should use attributes for className', () => {
+		const Demo = ({ c }) => (
+			<svg viewBox="0 0 360 360" {...(c ? {class:'foo_'+c} : {})}>
+				<path class={c && ('bar_'+c)} stroke="white" fill="black" d="M347.1 357.9L183.3 256.5 13 357.9V1.7h334.1v356.2zM58.5 47.2v231.4l124.8-74.1 118.3 72.8V47.2H58.5z" />
+			</svg>
+		);
+		let root = render(<Demo c="1" />, scratch, root);
+		sinon.spy(root, 'removeAttribute');
+		root = render(<Demo />, scratch, root);
+		expect(root.removeAttribute).to.have.been.calledOnce.and.calledWith('class');
+		root.removeAttribute.restore();
+
+		root = render(<div />, scratch, root);
+		root = render(<Demo />, scratch, root);
+		sinon.spy(root, 'setAttribute');
+		root = render(<Demo c="2" />, scratch, root);
+		expect(root.setAttribute).to.have.been.calledOnce.and.calledWith('class', 'foo_2');
+		root.setAttribute.restore();
+		root = render(<Demo c="3" />, scratch, root);
+		root = render(<Demo />, scratch, root);
+	});
+
+	it('should still support class attribute', () => {
+		render((
+			<svg viewBox="0 0 1 1" class="foo bar" />
+		), scratch);
+
+		expect(scratch.innerHTML).to.contain(` class="foo bar"`);
+	});
+
+	it('should serialize class', () => {
+		render((
+			<svg viewBox="0 0 1 1" class={{ foo: true, bar: false, other: 'hello' }} />
+		), scratch);
+
+		expect(scratch.innerHTML).to.contain(` class="foo other"`);
+	});
+
+	it('should switch back to HTML for <foreignObject>', () => {
+		render((
+			<svg>
+				<g>
+					<foreignObject>
+						<a href="#foo">test</a>
+					</foreignObject>
+				</g>
+			</svg>
+		), scratch);
+
+		expect(scratch.getElementsByTagName('a'))
+			.to.have.property('0')
+			.that.is.a('HTMLAnchorElement');
+	});
+});