From 7e17d303b577f8bf6541149e84f2eb119795f753 Mon Sep 17 00:00:00 2001
From: Jiachi Liu <inbox@huozhi.im>
Date: Mon, 16 Aug 2021 15:51:21 +0800
Subject: [PATCH] Fix crash of lint rule no-document-import-in-page

---
 .../lib/rules/no-document-import-in-page.js                | 4 +++-
 .../no-document-import-in-page.unit.test.js                | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/eslint-plugin-next/lib/rules/no-document-import-in-page.js b/packages/eslint-plugin-next/lib/rules/no-document-import-in-page.js
index 325974a93c47d04..093a64190aa580b 100644
--- a/packages/eslint-plugin-next/lib/rules/no-document-import-in-page.js
+++ b/packages/eslint-plugin-next/lib/rules/no-document-import-in-page.js
@@ -16,9 +16,11 @@ module.exports = {
         }
 
         const page = context.getFilename().split('pages')[1]
+        if (!page) {
+          return
+        }
         const { name, dir } = path.parse(page)
         if (
-          !page ||
           name.startsWith('_document') ||
           (dir === '/_document' && name === 'index')
         ) {
diff --git a/test/eslint-plugin-next/no-document-import-in-page.unit.test.js b/test/eslint-plugin-next/no-document-import-in-page.unit.test.js
index dfab540a783ad79..fc8a28ca5c12e85 100644
--- a/test/eslint-plugin-next/no-document-import-in-page.unit.test.js
+++ b/test/eslint-plugin-next/no-document-import-in-page.unit.test.js
@@ -86,6 +86,13 @@ ruleTester.run('no-document-import-in-page', rule, {
     `,
       filename: 'pages/_document/index.tsx',
     },
+    {
+      code: `import Document from "next/document"
+
+      export const Test = () => <p>Test</p>
+      `,
+      filename: 'components/test.js',
+    },
   ],
   invalid: [
     {