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Improved DevTools context test harness #19878

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Merged
merged 1 commit into from
Sep 21, 2020
Merged

Improved DevTools context test harness #19878

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75 changes: 52 additions & 23 deletions packages/react-devtools-shell/src/app/InspectableElements/Contexts.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,11 +8,19 @@
*/

import * as React from 'react';
import {createContext, Component, Fragment, useContext} from 'react';
import {createContext, Component, useContext} from 'react';
import PropTypes from 'prop-types';

function someNamedFunction() {}

function formatContextForDisplay(name, value) {
return (
<li>
{name}: <pre>{JSON.stringify(value, null, 2)}</pre>
</li>
);
}

const contextData = {
array: ['first', 'second', 'third'],
bool: true,
Expand Down Expand Up @@ -61,7 +69,7 @@ class LegacyContextConsumer extends Component<any> {
};

render() {
return null;
return formatContextForDisplay('LegacyContextConsumer', this.context);
}
}

Expand All @@ -88,34 +96,55 @@ class ModernContextType extends Component<any> {
static contextType = ModernContext;

render() {
return null;
return formatContextForDisplay('ModernContextType', this.context);
}
}

function FunctionalContextConsumer() {
useContext(StringContext);
return null;
const value = useContext(StringContext);
return formatContextForDisplay('FunctionalContextConsumer', value);
}

export default function Contexts() {
return (
<Fragment>
<LegacyContextProvider>
<LegacyContextConsumer />
</LegacyContextProvider>
<ModernContext.Provider value={contextData}>
<ModernContext.Consumer>{value => null}</ModernContext.Consumer>
<ModernContextType />
</ModernContext.Provider>
<FunctionalContextConsumer />
<ArrayContext.Consumer>{value => null}</ArrayContext.Consumer>
<BoolContext.Consumer>{value => null}</BoolContext.Consumer>
<FuncContext.Consumer>{value => null}</FuncContext.Consumer>
<NumberContext.Consumer>{value => null}</NumberContext.Consumer>
<StringContext.Consumer>{value => null}</StringContext.Consumer>
<SymbolContext.Consumer>{value => null}</SymbolContext.Consumer>
<NullContext.Consumer>{value => null}</NullContext.Consumer>
<UndefinedContext.Consumer>{value => null}</UndefinedContext.Consumer>
</Fragment>
<div>
<h1>Contexts</h1>
<ul>
<LegacyContextProvider>
<LegacyContextConsumer />
</LegacyContextProvider>
<ModernContext.Provider value={contextData}>
<ModernContext.Consumer>
{value => formatContextForDisplay('ModernContext.Consumer', value)}
</ModernContext.Consumer>
<ModernContextType />
</ModernContext.Provider>
<FunctionalContextConsumer />
<ArrayContext.Consumer>
{value => formatContextForDisplay('ArrayContext.Consumer', value)}
</ArrayContext.Consumer>
<BoolContext.Consumer>
{value => formatContextForDisplay('BoolContext.Consumer', value)}
</BoolContext.Consumer>
<FuncContext.Consumer>
{value => formatContextForDisplay('FuncContext.Consumer', value)}
</FuncContext.Consumer>
<NumberContext.Consumer>
{value => formatContextForDisplay('NumberContext.Consumer', value)}
</NumberContext.Consumer>
<StringContext.Consumer>
{value => formatContextForDisplay('StringContext.Consumer', value)}
</StringContext.Consumer>
<SymbolContext.Consumer>
{value => formatContextForDisplay('SymbolContext.Consumer', value)}
</SymbolContext.Consumer>
<NullContext.Consumer>
{value => formatContextForDisplay('NullContext.Consumer', value)}
</NullContext.Consumer>
<UndefinedContext.Consumer>
{value => formatContextForDisplay('UndefinedContext.Consumer', value)}
</UndefinedContext.Consumer>
</ul>
</div>
);
}