react-native/Libraries/Lists/__flowtests__/FlatList-flowtest.js

113 lines
2.6 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
* @format
*/
'use strict';
const FlatList = require('FlatList');
const React = require('react');
function renderMyListItem(info: {item: {title: string}, index: number}) {
return <span />;
}
module.exports = {
testEverythingIsFine() {
const data = [
{
title: 'Title Text',
key: 1,
},
];
return <FlatList renderItem={renderMyListItem} data={data} />;
},
testBadDataWithTypicalItem() {
const data = [
{
// $FlowExpectedError - bad title type 6, should be string
title: 6,
key: 1,
},
];
return <FlatList renderItem={renderMyListItem} data={data} />;
},
testMissingFieldWithTypicalItem() {
const data = [
{
key: 1,
},
];
// $FlowExpectedError - missing title
return <FlatList renderItem={renderMyListItem} data={data} />;
},
testGoodDataWithBadCustomRenderItemFunction() {
const data = [
{
widget: 6,
key: 1,
},
];
return (
<FlatList
renderItem={info => (
<span>
{
// $FlowExpectedError - bad widgetCount type 6, should be Object
info.item.widget.missingProp
}
</span>
)}
data={data}
/>
);
},
testBadRenderItemFunction() {
const data = [
{
title: 'foo',
key: 1,
},
];
return [
// $FlowExpectedError - title should be inside `item`
<FlatList renderItem={(info: {title: string}) => <span />} data={data} />,
<FlatList
// $FlowExpectedError - bad index type string, should be number
renderItem={(info: {item: any, index: string}) => <span />}
data={data}
/>,
<FlatList
// $FlowExpectedError - bad title type number, should be string
renderItem={(info: {item: {title: number}}) => <span />}
data={data}
/>,
// EverythingIsFine
<FlatList
renderItem={(info: {item: {title: string}}) => <span />}
data={data}
/>,
];
},
testOtherBadProps() {
return [
// $FlowExpectedError - bad numColumns type "lots"
<FlatList renderItem={renderMyListItem} data={[]} numColumns="lots" />,
// $FlowExpectedError - bad windowSize type "big"
<FlatList renderItem={renderMyListItem} data={[]} windowSize="big" />,
// $FlowExpectedError - missing `data` prop
<FlatList renderItem={renderMyListItem} />,
];
},
};