/
ReactPerf-test.js
741 lines (656 loc) · 19.1 KB
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ReactPerf-test.js
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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @emails react-core
*/
'use strict';
describe('ReactPerf', () => {
var React;
var ReactDOM;
var ReactPerf;
var ReactTestUtils;
var emptyFunction;
var App;
var Box;
var Div;
var LifeCycle;
beforeEach(() => {
var now = 0;
jest.setMock('fbjs/lib/performanceNow', function() {
return now++;
});
if (typeof console.table !== 'function') {
console.table = () => {};
console.table.isFake = true;
}
React = require('React');
ReactDOM = require('ReactDOM');
ReactPerf = require('ReactPerf');
ReactTestUtils = require('ReactTestUtils');
emptyFunction = require('emptyFunction');
App = class extends React.Component {
render() {
return <div><Box /><Box flip={this.props.flipSecond} /></div>;
}
};
Box = class extends React.Component {
render() {
return <div key={!!this.props.flip}><input /></div>;
}
};
// ReactPerf only measures composites, so we put everything in one.
Div = class extends React.Component {
render() {
return <div {...this.props} />;
}
};
LifeCycle = class extends React.Component {
shouldComponentUpdate = emptyFunction.thatReturnsTrue;
componentWillMount = emptyFunction;
componentDidMount = emptyFunction;
componentWillReceiveProps = emptyFunction;
componentWillUpdate = emptyFunction;
componentDidUpdate = emptyFunction;
componentWillUnmount = emptyFunction;
render = emptyFunction.thatReturnsNull;
};
});
afterEach(() => {
if (console.table.isFake) {
delete console.table;
}
});
function measure(fn) {
ReactPerf.start();
fn();
ReactPerf.stop();
// Make sure none of the methods crash.
ReactPerf.getWasted();
ReactPerf.getInclusive();
ReactPerf.getExclusive();
ReactPerf.getOperations();
return ReactPerf.getLastMeasurements();
}
it('should count no-op update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<App />, container);
var measurements = measure(() => {
ReactDOM.render(<App />, container);
});
var summary = ReactPerf.getWasted(measurements);
expect(summary).toEqual([
{
key: 'App',
instanceCount: 1,
inclusiveRenderDuration: 3,
renderCount: 1,
},
{
key: 'App > Box',
instanceCount: 2,
inclusiveRenderDuration: 2,
renderCount: 2,
},
]);
});
it('should count no-op update in child as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<App />, container);
// Here, we add a Box -- two of the <Box /> updates are wasted time (but the
// addition of the third is not)
var measurements = measure(() => {
ReactDOM.render(<App flipSecond={true} />, container);
});
var summary = ReactPerf.getWasted(measurements);
expect(summary).toEqual([
{
key: 'App > Box',
instanceCount: 1,
inclusiveRenderDuration: 1,
renderCount: 1,
},
]);
});
function expectNoWaste(fn) {
var measurements = measure(fn);
var summary = ReactPerf.getWasted(measurements);
expect(summary).toEqual([]);
}
it('should not count initial render as waste', () => {
expectNoWaste(() => {
ReactTestUtils.renderIntoDocument(<App />);
});
});
it('should not count unmount as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div>hello</Div>, container);
expectNoWaste(() => {
ReactDOM.unmountComponentAtNode(container);
});
});
it('should not count content update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div>hello</Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div>hello world</Div>, container);
});
});
it('should not count child addition as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div><span /></Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div><span /><span /></Div>, container);
});
});
it('should not count child removal as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div><span /><span /></Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div><span /></Div>, container);
});
});
it('should not count property update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div className="yellow">hey</Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div className="blue">hey</Div>, container);
});
});
it('should not count style update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div style={{color: 'yellow'}}>hey</Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div style={{color: 'blue'}}>hey</Div>, container);
});
});
it('should not count property removal as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div className="yellow">hey</Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div>hey</Div>, container);
});
});
it('should not count raw HTML update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(
<Div dangerouslySetInnerHTML={{__html: 'me'}} />,
container,
);
expectNoWaste(() => {
ReactDOM.render(
<Div dangerouslySetInnerHTML={{__html: 'you'}} />,
container,
);
});
});
it('should not count child reordering as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div><div key="A" /><div key="B" /></Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div><div key="B" /><div key="A" /></Div>, container);
});
});
it('should not count text update as waste', () => {
var container = document.createElement('div');
ReactDOM.render(<Div>{'hello'}{'world'}</Div>, container);
expectNoWaste(() => {
ReactDOM.render(<Div>{'hello'}{'friend'}</Div>, container);
});
});
it('should not count replacing null with a host as waste', () => {
var element = null;
function Foo() {
return element;
}
var container = document.createElement('div');
ReactDOM.render(<Foo />, container);
expectNoWaste(() => {
element = <div />;
ReactDOM.render(<Foo />, container);
});
});
it('should not count replacing a host with null as waste', () => {
var element = <div />;
function Foo() {
return element;
}
var container = document.createElement('div');
ReactDOM.render(<Foo />, container);
expectNoWaste(() => {
element = null;
ReactDOM.render(<Foo />, container);
});
});
it('should include stats for components unmounted during measurement', () => {
var container = document.createElement('div');
var measurements = measure(() => {
ReactDOM.render(<Div><Div key="a" /></Div>, container);
ReactDOM.render(<Div><Div key="b" /></Div>, container);
});
expect(ReactPerf.getExclusive(measurements)).toEqual([
{
key: 'Div',
instanceCount: 3,
counts: {ctor: 3, render: 4},
durations: {ctor: 3, render: 4},
totalDuration: 7,
},
]);
});
it('should include lifecycle methods in measurements', () => {
var container = document.createElement('div');
var measurements = measure(() => {
var instance = ReactDOM.render(<LifeCycle />, container);
ReactDOM.render(<LifeCycle />, container);
instance.setState({});
ReactDOM.unmountComponentAtNode(container);
});
expect(ReactPerf.getExclusive(measurements)).toEqual([
{
key: 'LifeCycle',
instanceCount: 1,
totalDuration: 14,
counts: {
ctor: 1,
shouldComponentUpdate: 2,
componentWillMount: 1,
componentDidMount: 1,
componentWillReceiveProps: 1,
componentWillUpdate: 2,
componentDidUpdate: 2,
componentWillUnmount: 1,
render: 3,
},
durations: {
ctor: 1,
shouldComponentUpdate: 2,
componentWillMount: 1,
componentDidMount: 1,
componentWillReceiveProps: 1,
componentWillUpdate: 2,
componentDidUpdate: 2,
componentWillUnmount: 1,
render: 3,
},
},
]);
});
it('should include render time of functional components', () => {
function Foo() {
return null;
}
var container = document.createElement('div');
var measurements = measure(() => {
ReactDOM.render(<Foo />, container);
});
expect(ReactPerf.getExclusive(measurements)).toEqual([
{
key: 'Foo',
instanceCount: 1,
totalDuration: 1,
counts: {
render: 1,
},
durations: {
render: 1,
},
},
]);
});
it('should not count time in a portal towards lifecycle method', () => {
function Foo() {
return null;
}
var portalContainer = document.createElement('div');
class Portal extends React.Component {
componentDidMount() {
ReactDOM.render(<Foo />, portalContainer);
}
render() {
return null;
}
}
var container = document.createElement('div');
var measurements = measure(() => {
ReactDOM.render(<Portal />, container);
});
expect(ReactPerf.getExclusive(measurements)).toEqual([
{
key: 'Portal',
instanceCount: 1,
totalDuration: 6,
counts: {
ctor: 1,
componentDidMount: 1,
render: 1,
},
durations: {
ctor: 1,
// We want to exclude nested imperative ReactDOM.render() from lifecycle hook's own time.
// Otherwise it would artificially float to the top even though its exclusive time is small.
// This is how we get 4 as a number with the performanceNow() mock:
// - we capture the time we enter componentDidMount (n = 0)
// - we capture the time when we enter a nested flush (n = 1)
// - in the nested flush, we call it twice: before and after <Foo /> rendering. (n = 3)
// - we capture the time when we exit a nested flush (n = 4)
// - we capture the time we exit componentDidMount (n = 5)
// Time spent in componentDidMount = (5 - 0 - (4 - 3)) = 4.
componentDidMount: 4,
render: 1,
},
},
{
key: 'Foo',
instanceCount: 1,
totalDuration: 1,
counts: {
render: 1,
},
durations: {
render: 1,
},
},
]);
});
it('warns once when using getMeasurementsSummaryMap', () => {
var measurements = measure(() => {});
spyOn(console, 'warn');
ReactPerf.getMeasurementsSummaryMap(measurements);
expect(console.warn.calls.count()).toBe(1);
expect(console.warn.calls.argsFor(0)[0]).toContain(
'`ReactPerf.getMeasurementsSummaryMap(...)` is deprecated. Use ' +
'`ReactPerf.getWasted(...)` instead.',
);
ReactPerf.getMeasurementsSummaryMap(measurements);
expect(console.warn.calls.count()).toBe(1);
});
it('warns once when using printDOM', () => {
var measurements = measure(() => {});
spyOn(console, 'warn');
ReactPerf.printDOM(measurements);
expect(console.warn.calls.count()).toBe(1);
expect(console.warn.calls.argsFor(0)[0]).toContain(
'`ReactPerf.printDOM(...)` is deprecated. Use ' +
'`ReactPerf.printOperations(...)` instead.',
);
ReactPerf.printDOM(measurements);
expect(console.warn.calls.count()).toBe(1);
});
it('returns isRunning state', () => {
expect(ReactPerf.isRunning()).toBe(false);
ReactPerf.start();
expect(ReactPerf.isRunning()).toBe(true);
ReactPerf.stop();
expect(ReactPerf.isRunning()).toBe(false);
});
it('start has no effect when already running', () => {
expect(ReactPerf.isRunning()).toBe(false);
ReactPerf.start();
expect(ReactPerf.isRunning()).toBe(true);
ReactPerf.start();
expect(ReactPerf.isRunning()).toBe(true);
ReactPerf.stop();
expect(ReactPerf.isRunning()).toBe(false);
});
it('stop has no effect when already stopped', () => {
expect(ReactPerf.isRunning()).toBe(false);
ReactPerf.stop();
expect(ReactPerf.isRunning()).toBe(false);
ReactPerf.stop();
expect(ReactPerf.isRunning()).toBe(false);
});
it('should print console error only once', () => {
__DEV__ = false;
spyOn(console, 'error');
expect(ReactPerf.getLastMeasurements()).toEqual([]);
expect(ReactPerf.getExclusive()).toEqual([]);
expect(ReactPerf.getInclusive()).toEqual([]);
expect(ReactPerf.getWasted()).toEqual([]);
expect(ReactPerf.getOperations()).toEqual([]);
expect(ReactPerf.printExclusive()).toEqual(undefined);
expect(ReactPerf.printInclusive()).toEqual(undefined);
expect(ReactPerf.printWasted()).toEqual(undefined);
expect(ReactPerf.printOperations()).toEqual(undefined);
expect(ReactPerf.start()).toBe(undefined);
expect(ReactPerf.stop()).toBe(undefined);
expect(ReactPerf.isRunning()).toBe(false);
expect(console.error.calls.count()).toBe(1);
__DEV__ = true;
});
it('should work when measurement starts during reconciliation', () => {
// https://github.com/facebook/react/issues/6949#issuecomment-230371009
class Measurer extends React.Component {
componentWillMount() {
ReactPerf.start();
}
componentDidMount() {
ReactPerf.stop();
}
componentWillUpdate() {
ReactPerf.start();
}
componentDidUpdate() {
ReactPerf.stop();
}
render() {
// Force reconciliation despite constant element
return React.cloneElement(this.props.children);
}
}
var container = document.createElement('div');
ReactDOM.render(<Measurer><App /></Measurer>, container);
expect(ReactPerf.getWasted()).toEqual([]);
ReactDOM.render(<Measurer><App /></Measurer>, container);
expect(ReactPerf.getWasted()).toEqual([
{
key: 'Measurer',
instanceCount: 1,
inclusiveRenderDuration: 4,
renderCount: 1,
},
{
key: 'App',
instanceCount: 1,
inclusiveRenderDuration: 3,
renderCount: 1,
},
{
key: 'App > Box',
instanceCount: 2,
inclusiveRenderDuration: 2,
renderCount: 2,
},
]);
});
it('should not print errant warnings if render() throws', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
render() {
throw thrownErr;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<Evil />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactPerf.stop();
});
it('should not print errant warnings if componentWillMount() throws', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
componentWillMount() {
throw thrownErr;
}
render() {
return <div />;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<Evil />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactPerf.stop();
});
it('should not print errant warnings if componentDidMount() throws', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
componentDidMount() {
throw thrownErr;
}
render() {
return <div />;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<Evil />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactPerf.stop();
});
it('should not print errant warnings if portal throws in render()', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
render() {
throw thrownErr;
}
}
class EvilPortal extends React.Component {
componentWillMount() {
var portalContainer = document.createElement('div');
ReactDOM.render(<Evil />, portalContainer);
}
render() {
return <div />;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<EvilPortal />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactDOM.unmountComponentAtNode(container);
ReactPerf.stop();
});
it('should not print errant warnings if portal throws in componentWillMount()', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
componentWillMount() {
throw thrownErr;
}
render() {
return <div />;
}
}
class EvilPortal extends React.Component {
componentWillMount() {
var portalContainer = document.createElement('div');
ReactDOM.render(<Evil />, portalContainer);
}
render() {
return <div />;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<EvilPortal />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactDOM.unmountComponentAtNode(container);
ReactPerf.stop();
});
it('should not print errant warnings if portal throws in componentDidMount()', () => {
var container = document.createElement('div');
var thrownErr = new Error('Muhaha!');
class Evil extends React.Component {
componentDidMount() {
throw thrownErr;
}
render() {
return <div />;
}
}
class EvilPortal extends React.Component {
componentWillMount() {
var portalContainer = document.createElement('div');
ReactDOM.render(<Evil />, portalContainer);
}
render() {
return <div />;
}
}
ReactPerf.start();
try {
ReactDOM.render(
<div>
<LifeCycle />
<EvilPortal />
</div>,
container,
);
} catch (err) {
if (err !== thrownErr) {
throw err;
}
}
ReactDOM.unmountComponentAtNode(container);
ReactPerf.stop();
});
});