Update: Add exceptionPatterns to id-length rule (fixes #13094)

lib/rules/id-length.js

@@ -39,6 +39,13 @@ module.exports = {
                             type: "string"
                         }
                     },
+                    exceptionPatterns: {
+                        type: "array",
+                        uniqueItems: true,
+                        items: {
+                            type: "string"
+                        }
+                    },
                     properties: {
                         enum: ["always", "never"]
                     }
@@ -63,6 +70,7 @@ module.exports = {
 
                 return obj;
             }, {});
+        const exceptionPatterns = options.exceptionPatterns || [];
         const reportedNode = new Set();
 
         const SUPPORTED_EXPRESSIONS = {
@@ -111,8 +119,11 @@ module.exports = {
 
                 const isShort = name.length < minLength;
                 const isLong = name.length > maxLength;
+                const matchesExceptions = exceptionPatterns.some(
+                    pattern => new RegExp(pattern, "u").test(name)
+                );
 
-                if (!(isShort || isLong) || exceptions[name]) {
+                if (!(isShort || isLong) || exceptions[name] || matchesExceptions) {
                     return; // Nothing to report
                 }
 

tests/lib/rules/id-length.js

@@ -77,7 +77,8 @@ ruleTester.run("id-length", rule, {
         { code: "var {x} = foo;", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
         { code: "var {x, y: {z}} = foo;", options: [{ properties: "never" }], parserOptions: { ecmaVersion: 6 } },
         { code: "let foo = { [a]: 1 };", options: [{ properties: "always" }], parserOptions: { ecmaVersion: 6 } },
-        { code: "let foo = { [a + b]: 1 };", options: [{ properties: "always" }], parserOptions: { ecmaVersion: 6 } }
+        { code: "let foo = { [a + b]: 1 };", options: [{ properties: "always" }], parserOptions: { ecmaVersion: 6 } },
+        { code: "function BEFORE_send() {};", options: [{ min: 3, max: 5, exceptionPatterns: ["^BEFORE_"] }], parserOptions: { ecmaVersion: 6 } }
     ],
     invalid: [
         { code: "var x = 1;", errors: [tooShortError] },
@@ -440,6 +441,14 @@ ruleTester.run("id-length", rule, {
             errors: [
                 tooShortError
             ]
+        },
+        {
+            code: "function BEFORE_send() {};",
+            options: [{ min: 3, max: 5 }],
+            parserOptions: { ecmaVersion: 6 },
+            errors: [
+                tooLongError
+            ]
         }
     ]
 });