test: replace indexOf with includes

Refs: #12586
PR-URL: #14630
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>

test/async-hooks/init-hooks.js

@@ -67,7 +67,7 @@ class ActivityCollector {
     const violations = [];
     function v(msg) { violations.push(msg); }
     for (const a of this._activities.values()) {
-      if (types != null && types.indexOf(a.type) < 0) continue;
+      if (types != null && !types.includes(a.type)) continue;
 
       if (a.init && a.init.length > 1) {
         v('Activity inited twice\n' + activityString(a) +
@@ -131,7 +131,7 @@ class ActivityCollector {
 
   activitiesOfTypes(types) {
     if (!Array.isArray(types)) types = [ types ];
-    return this.activities.filter((x) => types.indexOf(x.type) >= 0);
+    return this.activities.filter((x) => types.includes(x.type));
   }
 
   get activities() {

test/parallel/test-repl-tab-complete.js

@@ -411,7 +411,7 @@ const warningRegEx = new RegExp(
     });
 
     // no `biu`
-    assert.strictEqual(data.indexOf('ele.biu'), -1);
+    assert.strictEqual(data.includes('ele.biu'), false);
   }));
 });