feat: no-property-in-node add additionalNodeTypeFiles option (eslint-community#484)

Author: JoshuaKGoldberg

lib/rules/no-property-in-node.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const typedNodeSourceFileTesters = [
+const defaultTypedNodeSourceFileTesters = [
   /@types[/\\]estree[/\\]index\.d\.ts/,
   /@typescript-eslint[/\\]types[/\\]dist[/\\]generated[/\\]ast-spec\.d\.ts/,
 ];
@@ -26,9 +26,10 @@ const typedNodeSourceFileTesters = [
  * ```
  *
  * @param {import('typescript').Type} type
+ * @param {RegExp[]} typedNodeSourceFileTesters
  * @returns Whether the type seems to include a known ESTree or TSESTree AST node.
  */
-function isAstNodeType(type) {
+function isAstNodeType(type, typedNodeSourceFileTesters) {
   return (type.types || [type])
     .filter((typePart) => typePart.getProperty('type'))
     .flatMap(
@@ -55,13 +56,33 @@ module.exports = {
       requiresTypeChecking: true,
       url: 'https://github.com/eslint-community/eslint-plugin-eslint-plugin/tree/HEAD/docs/rules/no-property-in-node.md',
     },
-    schema: [],
+    schema: [
+      {
+        type: 'object',
+        properties: {
+          additionalNodeTypeFiles: {
+            description:
+              'Any additional regular expressions to consider source files defining AST Node types.',
+            elements: { type: 'string' },
+            type: 'array',
+          },
+        },
+        additionalProperties: false,
+      },
+    ],
     messages: {
       in: 'Prefer checking specific node properties instead of a broad `in`.',
     },
   },
 
   create(context) {
+    const typedNodeSourceFileTesters = [
+      ...defaultTypedNodeSourceFileTesters,
+      ...(context.options[0]?.additionalNodeTypeFiles?.map(
+        (filePath) => new RegExp(filePath),
+      ) ?? []),
+    ];
+
     return {
       'BinaryExpression[operator=in]'(node) {
         // TODO: Switch this to ESLintUtils.getParserServices with typescript-eslint@>=6
@@ -77,7 +98,7 @@ module.exports = {
         const tsNode = services.esTreeNodeToTSNodeMap.get(node.right);
         const type = checker.getTypeAtLocation(tsNode);
 
-        if (isAstNodeType(type)) {
+        if (isAstNodeType(type, typedNodeSourceFileTesters)) {
           context.report({ messageId: 'in', node });
         }
       },

tests/lib/rules/no-property-in-node.js

@@ -93,6 +93,21 @@ ruleTester.run('no-property-in-node', rule, {
         },
       };
     `,
+    {
+      code: `
+        interface Node {
+          type: string;
+        }
+        declare const node: Node;
+        'a' in node;
+        export {};
+      `,
+      options: [
+        {
+          additionalNodeTypeFiles: [/not-found/],
+        },
+      ],
+    },
   ],
   invalid: [
     {
@@ -163,5 +178,29 @@ ruleTester.run('no-property-in-node', rule, {
         },
       ],
     },
+    {
+      code: `
+        interface Node {
+          type: string;
+        }
+        declare const node: Node;
+        'a' in node;
+        export {};
+      `,
+      options: [
+        {
+          additionalNodeTypeFiles: [/lib[/\\]fixtures[/\\]estree\.ts/],
+        },
+      ],
+      errors: [
+        {
+          column: 9,
+          line: 6,
+          endColumn: 20,
+          endLine: 6,
+          messageId: 'in',
+        },
+      ],
+    },
   ],
 });