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no-empty-file: Fix false positive with triple-slash directives #1605

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merged 6 commits into from Nov 15, 2021
Merged

no-empty-file: Fix false positive with triple-slash directives #1605

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a08a6cb
Fixes `no-empty-file` false positive with triple-slash directives.
manovotny Nov 11, 2021
64f1812
Looks for triple-slash directive instead of filename.
manovotny Nov 12, 2021
66a1616
Changes comments from node lookup to `sourceCode.getAllComments()`.
manovotny Nov 12, 2021
f28d616
Merge branch 'main' into fix-no-empty-file-false-positive-triple-slas…
manovotny Nov 12, 2021
c4cfca7
Simplifies directive check by removing double negative.
manovotny Nov 12, 2021
d9f76cd
Splits triple-slash directive check into it's own check for better pe…
manovotny Nov 12, 2021
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17 changes: 14 additions & 3 deletions rules/no-empty-file.js
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Expand Up @@ -5,13 +5,24 @@ const messages = {
[MESSAGE_ID]: 'Empty files are not allowed.',
};

const isTripleSlashDirective = node =>
node.type === 'Line' && node.value.startsWith('/');

const isEmpty = node =>
(
(node.type === 'Program' || node.type === 'BlockStatement')
node.type === 'Program'
&& node.body.every(currentNode => isEmpty(currentNode))
&& node.comments.every(currentNode => !isTripleSlashDirective(currentNode))
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)
|| (
node.type === 'BlockStatement'
&& node.body.every(currentNode => isEmpty(currentNode))
)
|| node.type === 'EmptyStatement'
|| (node.type === 'ExpressionStatement' && 'directive' in node);
|| (
node.type === 'ExpressionStatement'
&& 'directive' in node
)
|| node.type === 'EmptyStatement';

const create = context => {
const filename = context.getPhysicalFilename().toLowerCase();
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4 changes: 4 additions & 0 deletions test/no-empty-file.mjs
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Expand Up @@ -37,6 +37,10 @@ test.snapshot({
'svelte',
'tsx',
].map(extension => ({code: '', filename: `example.${extension}`})),
...[
'd.ts',
'ts',
].map(extension => ({code: '/// <reference types="example" />', filename: `example.${extension}`})),
],
invalid: [
...[
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