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[Fix] react/prefer-read-only-props fails if using Flow's $ReadOnly<T> #2770

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2 changes: 1 addition & 1 deletion lib/rules/prefer-read-only-props.js
Expand Up @@ -13,7 +13,7 @@ function isFlowPropertyType(node) {
}

function isCovariant(node) {
return node.variance && node.variance.kind === 'plus';
return node.variance && node.variance.kind === 'plus' || node.parent.parent.parent.id && node.parent.parent.parent.id.name === '$ReadOnly';
}

// ------------------------------------------------------------------------------
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13 changes: 13 additions & 0 deletions tests/lib/rules/prefer-read-only-props.js
Expand Up @@ -131,6 +131,19 @@ ruleTester.run('prefer-read-only-props', rule, {
name: PropTypes.string,
};
`
},
// Class component with typed props property wrapped in $ReadOnly
{
code: [
'type Props = $ReadOnly<{foo: number}>;',
'class Hello extends React.Component {',
' props: Props;',
' render () {',
' return <div>{this.props.foo}</div>;',
' }',
'}'
].join('\n'),
parser: parsers.BABEL_ESLINT
}
],

Expand Down