tools: enable ESLint require-yield rule

PR-URL: nodejs#41463
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>

.eslintrc.js

@@ -320,6 +320,7 @@ module.exports = {
     'quotes': ['error', 'single', { avoidEscape: true }],
     'quote-props': ['error', 'consistent'],
     'rest-spread-spacing': 'error',
+    'require-yield': 'error',
     'semi': 'error',
     'semi-spacing': 'error',
     'space-before-blocks': ['error', 'always'],

test/parallel/test-readable-from.js

@@ -126,7 +126,7 @@ async function toReadableOnDataNonObject() {
 }
 
 async function destroysTheStreamWhenThrowing() {
-  async function* generate() {
+  async function* generate() { // eslint-disable-line require-yield
     throw new Error('kaboom');
   }
 

test/parallel/test-stream-compose.js

@@ -234,7 +234,7 @@ const assert = require('assert');
         callback(null, chunk);
       })
     }),
-    async function*(source) {
+    async function*(source) { // eslint-disable-line require-yield
       let tmp = '';
       for await (const chunk of source) {
         tmp += chunk;

test/parallel/test-stream-duplex-from.js

@@ -134,7 +134,7 @@ const { Duplex, Readable, Writable, pipeline } = require('stream');
       }
       yield rest;
     }),
-    async function * (source) {
+    async function * (source) { // eslint-disable-line require-yield
       let ret = '';
       for await (const x of source) {
         ret += x;

test/parallel/test-stream-pipeline.js

@@ -699,8 +699,8 @@ const tsp = require('timers/promises');
   const ret = pipeline(async function*() {
     await Promise.resolve();
     yield 'hello';
-  }, async function*(source) {
-    for await (const chunk of source) {}
+  }, async function*(source) { // eslint-disable-line require-yield
+    for await (const chunk of source) {} // eslint-disable-line no-unused-vars
   }, common.mustCall((err) => {
     assert.strictEqual(err, undefined);
   }));
@@ -712,11 +712,11 @@ const tsp = require('timers/promises');
   // AsyncFunction destination is not returned and error is
   // propagated.
 
-  const ret = pipeline(async function*() {
+  const ret = pipeline(async function*() { // eslint-disable-line require-yield
     await Promise.resolve();
     throw new Error('kaboom');
-  }, async function*(source) {
-    for await (const chunk of source) {}
+  }, async function*(source) { // eslint-disable-line require-yield
+    for await (const chunk of source) {} // eslint-disable-line no-unused-vars
   }, common.mustCall((err) => {
     assert.strictEqual(err.message, 'kaboom');
   }));
@@ -726,7 +726,7 @@ const tsp = require('timers/promises');
 
 {
   const s = new PassThrough();
-  pipeline(async function*() {
+  pipeline(async function*() { // eslint-disable-line require-yield
     throw new Error('kaboom');
   }, s, common.mustCall((err) => {
     assert.strictEqual(err.message, 'kaboom');
@@ -736,7 +736,7 @@ const tsp = require('timers/promises');
 
 {
   const s = new PassThrough();
-  pipeline(async function*() {
+  pipeline(async function*() { // eslint-disable-line require-yield
     throw new Error('kaboom');
   }(), s, common.mustCall((err) => {
     assert.strictEqual(err.message, 'kaboom');
@@ -746,7 +746,7 @@ const tsp = require('timers/promises');
 
 {
   const s = new PassThrough();
-  pipeline(function*() {
+  pipeline(function*() { // eslint-disable-line require-yield
     throw new Error('kaboom');
   }, s, common.mustCall((err, val) => {
     assert.strictEqual(err.message, 'kaboom');
@@ -756,7 +756,7 @@ const tsp = require('timers/promises');
 
 {
   const s = new PassThrough();
-  pipeline(function*() {
+  pipeline(function*() { // eslint-disable-line require-yield
     throw new Error('kaboom');
   }(), s, common.mustCall((err, val) => {
     assert.strictEqual(err.message, 'kaboom');
@@ -771,7 +771,7 @@ const tsp = require('timers/promises');
     yield 'hello';
     yield 'world';
   }, s, async function(source) {
-    for await (const chunk of source) {
+    for await (const chunk of source) { // eslint-disable-line no-unused-vars
       throw new Error('kaboom');
     }
   }, common.mustCall((err, val) => {
@@ -784,8 +784,8 @@ const tsp = require('timers/promises');
   const s = new PassThrough();
   const ret = pipeline(function() {
     return ['hello', 'world'];
-  }, s, async function*(source) {
-    for await (const chunk of source) {
+  }, s, async function*(source) { // eslint-disable-line require-yield
+    for await (const chunk of source) { // eslint-disable-line no-unused-vars
       throw new Error('kaboom');
     }
   }, common.mustCall((err) => {
@@ -1054,12 +1054,11 @@ const tsp = require('timers/promises');
   const ws = new Writable({
     write: common.mustNotCall()
   });
-  pipeline(rs, async function*(stream) {
-    /* eslint no-unused-vars: off */
-    for await (const chunk of stream) {
+  pipeline(rs, async function*(stream) { // eslint-disable-line require-yield
+    for await (const chunk of stream) { // eslint-disable-line no-unused-vars
       throw new Error('kaboom');
     }
-  }, async function *(source) {
+  }, async function *(source) { // eslint-disable-line require-yield
     for await (const chunk of source) {
       res += chunk;
     }
@@ -1394,7 +1393,7 @@ const tsp = require('timers/promises');
   const ac = new AbortController();
   const signal = ac.signal;
   pipelinep(
-    async function * ({ signal }) {
+    async function * ({ signal }) { // eslint-disable-line require-yield
       await tsp.setTimeout(1e6, signal);
     },
     async function(source) {

test/parallel/test-worker-message-port-terminate-transfer-list.js

@@ -18,6 +18,7 @@ if (!process.env.HAS_STARTED_WORKER) {
 
   // Make sure we don’t end up running JS after the infinite loop is broken.
   port1.postMessage({}, {
+    // eslint-disable-next-line require-yield
     transfer: (function*() { while (true); })()
   });