fix: handle suggestions in helper function outside rule or inside nested spread/ternary in require-meta-has-suggestions rule (#291)

Author: bmish

lib/rules/require-meta-fixable.js

@@ -53,13 +53,9 @@ module.exports = {
     let contextIdentifiers;
     let usesFixFunctions;
 
-    // ----------------------------------------------------------------------
-    // Helpers
-    // ----------------------------------------------------------------------
-
-    // ----------------------------------------------------------------------
-    // Public
-    // ----------------------------------------------------------------------
+    if (!ruleInfo) {
+      return {};
+    }
 
     return {
       Program(ast) {

lib/rules/require-meta-has-suggestions.js

@@ -35,6 +35,33 @@ module.exports = {
     let contextIdentifiers;
     let ruleReportsSuggestions;
 
+    /**
+     * Check if a "suggest" object property from a rule violation report should be considered to contain suggestions.
+     * @param {Node} node - the "suggest" object property to check
+     * @returns {boolean} whether this property should be considered to contain suggestions
+     */
+    function doesPropertyContainSuggestions(node) {
+      const staticValue = getStaticValue(node.value, context.getScope());
+      if (
+        !staticValue ||
+        (Array.isArray(staticValue.value) && staticValue.value.length > 0) ||
+        (Array.isArray(staticValue.value) &&
+          staticValue.value.length === 0 &&
+          node.value.type === 'Identifier') // Array variable can have suggestions pushed to it.
+      ) {
+        // These are all considered reporting suggestions:
+        //   suggest: [{...}]
+        //   suggest: getSuggestions()
+        //   suggest: MY_SUGGESTIONS
+        return true;
+      }
+      return false;
+    }
+
+    if (!ruleInfo) {
+      return {};
+    }
+
     return {
       Program(ast) {
         contextIdentifiers = utils.getContextIdentifiers(scopeManager, ast);
@@ -52,28 +79,22 @@ module.exports = {
           const suggestProp = utils
             .evaluateObjectProperties(node.arguments[0], scopeManager)
             .find((prop) => utils.getKeyName(prop) === 'suggest');
-          if (suggestProp) {
-            const staticValue = getStaticValue(
-              suggestProp.value,
-              context.getScope()
-            );
-            if (
-              !staticValue ||
-              (Array.isArray(staticValue.value) &&
-                staticValue.value.length > 0) ||
-              (Array.isArray(staticValue.value) &&
-                staticValue.value.length === 0 &&
-                suggestProp.value.type === 'Identifier') // Array variable can have suggestions pushed to it.
-            ) {
-              // These are all considered reporting suggestions:
-              //   suggest: [{...}]
-              //   suggest: getSuggestions()
-              //   suggest: MY_SUGGESTIONS
-              ruleReportsSuggestions = true;
-            }
+          if (suggestProp && doesPropertyContainSuggestions(suggestProp)) {
+            ruleReportsSuggestions = true;
           }
         }
       },
+      Property(node) {
+        // In order to reduce false positives, we will also check for a `suggest` property anywhere in the file.
+        // This is helpful especially in the event that helper functions are used for reporting violations.
+        if (
+          node.key.type === 'Identifier' &&
+          node.key.name === 'suggest' &&
+          doesPropertyContainSuggestions(node)
+        ) {
+          ruleReportsSuggestions = true;
+        }
+      },
       'Program:exit'() {
         const metaNode = ruleInfo && ruleInfo.meta;
         const hasSuggestionsProperty = utils

tests/lib/rules/require-meta-fixable.js

@@ -212,6 +212,8 @@ ruleTester.run('require-meta-fixable', rule, {
     `,
       options: [{ catchNoFixerButFixableProperty: true }],
     },
+    // No rule present.
+    `const foo = { fix: [{}]}; context.report({node,message,fix});`,
   ],
 
   invalid: [

tests/lib/rules/require-meta-has-suggestions.js

@@ -134,6 +134,40 @@ ruleTester.run('require-meta-has-suggestions', rule, {
         }
       };
     `,
+    // Provides suggestions, helper function outside rule.
+    `
+      function report() {
+        context.report({ node, message, suggest: [{}] });
+      }
+      module.exports = {
+        meta: { hasSuggestions: true },
+        create(context) {
+          report();
+        }
+      };
+    `,
+    // Provides suggestions, with complex spread/ternary in reporting.
+    `
+      module.exports = {
+        meta: { hasSuggestions: true },
+        create(context) {
+          context.report({
+            node: node.id,
+            messageId: 'noEmptyWithSuper',
+            ...(useAutoFix
+              ? { fix }
+              : {
+                  suggest: [
+                    {
+                      messageId: 'noEmptyWithSuper',
+                      fix,
+                    },
+                  ],
+                }),
+          });
+        }
+      };
+    `,
     // Provides *dynamic* suggestions, has hasSuggestions property.
     `
       module.exports = {
@@ -205,6 +239,8 @@ ruleTester.run('require-meta-has-suggestions', rule, {
         }
       };
     `,
+    // No rule present.
+    `const foo = { suggest: [{}]}; context.report({node,message,suggest});`,
   ],
 
   invalid: [