Fix: added async in allow method in no-empty-function (fixes #12768)

docs/rules/no-empty-function.md

@@ -177,6 +177,8 @@ This rule has an option to allow specific kinds of functions to be empty.
     * `"getters"` - Getters.
     * `"setters"` - Setters.
     * `"constructors"` - Class constructors.
+    * `"asyncFunctions"` -  Async Functions.
+    * `"asyncMethods"` - Class methods and method shorthands of object literals with async
 
 #### allow: functions
 
@@ -307,6 +309,35 @@ class A {
 }
 ```
 
+#### allow: asyncFunctions
+
+Examples of **correct** code for  `{ "allow": ["asyncFunctions"] }` options:
+
+```js
+/*eslint no-empty-function: ["error", { "allow": ["asyncFunctions"] }]*/
+/*eslint-env es6*/
+
+async function a(){}
+```
+
+#### allow: asyncMethods
+
+Examples of **correct** code for  `{ "allow": ["asyncMethods"] }` options:
+
+```js
+/*eslint no-empty-function: ["error", { "allow": ["asyncMethods"] }]*/
+/*eslint-env es6*/
+
+var obj = {
+    async foo() {}
+};
+
+class A {
+    async foo() {}
+    static  async foo() {}
+}
+```
+
 ## When Not To Use It
 
 If you don't want to be notified about empty functions, then it's safe to disable this rule.

lib/rules/no-empty-function.js

@@ -23,7 +23,9 @@ const ALLOW_OPTIONS = Object.freeze([
     "generatorMethods",
     "getters",
     "setters",
-    "constructors"
+    "constructors",
+    "asyncFunctions",
+    "asyncMethods"
 ]);
 
 /**

tests/lib/rules/no-empty-function.js

@@ -24,7 +24,9 @@ const ALLOW_OPTIONS = Object.freeze([
     "generatorMethods",
     "getters",
     "setters",
-    "constructors"
+    "constructors",
+    "asyncFunctions",
+    "asyncMethods"
 ]);
 
 /**
@@ -267,6 +269,16 @@ ruleTester.run("no-empty-function", rule, [
         {
             code: "var foo = () => 0;",
             parserOptions: { ecmaVersion: 6 }
+        },
+        {
+            code: "const foo = { async method() {} }",
+            options: [{ allow: ["asyncMethods"] }],
+            parserOptions: { ecmaVersion: 8 }
+        },
+        {
+            code: "async function a(){}",
+            options: [{ allow: ["asyncFunctions"] }],
+            parserOptions: { ecmaVersion: 8 }
         }
     ],
     invalid: []