test: remove unnecessary assertions

It’s not necessary to assert that the internal `hasRef()`
method exists, since it is always called directly afterwards
in these tests. Furthermore, the test is overly specific,
in that it expects them on a specific position in the prototype
chain.

PR-URL: #23040
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

test/parallel/test-handle-wrap-isrefed.js

@@ -9,8 +9,6 @@ const strictEqual = require('assert').strictEqual;
   const spawn = require('child_process').spawn;
   const cmd = common.isWindows ? 'rundll32' : 'ls';
   const cp = spawn(cmd);
-  strictEqual(Object.getPrototypeOf(cp._handle).hasOwnProperty('hasRef'),
-              true, 'process_wrap: hasRef() missing');
   strictEqual(cp._handle.hasRef(),
               true, 'process_wrap: not initially refed');
   cp.unref();
@@ -33,8 +31,6 @@ const { kStateSymbol } = require('internal/dgram');
   const sock4 = dgram.createSocket('udp4');
   const handle = sock4[kStateSymbol].handle;
 
-  strictEqual(Object.getPrototypeOf(handle).hasOwnProperty('hasRef'),
-              true, 'udp_wrap: ipv4: hasRef() missing');
   strictEqual(handle.hasRef(),
               true, 'udp_wrap: ipv4: not initially refed');
   sock4.unref();
@@ -54,8 +50,6 @@ const { kStateSymbol } = require('internal/dgram');
   const sock6 = dgram.createSocket('udp6');
   const handle = sock6[kStateSymbol].handle;
 
-  strictEqual(Object.getPrototypeOf(handle).hasOwnProperty('hasRef'),
-              true, 'udp_wrap: ipv6: hasRef() missing');
   strictEqual(handle.hasRef(),
               true, 'udp_wrap: ipv6: not initially refed');
   sock6.unref();
@@ -74,8 +68,6 @@ const { kStateSymbol } = require('internal/dgram');
 {
   const { Pipe, constants: PipeConstants } = process.binding('pipe_wrap');
   const handle = new Pipe(PipeConstants.SOCKET);
-  strictEqual(Object.getPrototypeOf(handle).hasOwnProperty('hasRef'),
-              true, 'pipe_wrap: hasRef() missing');
   strictEqual(handle.hasRef(),
               true, 'pipe_wrap: not initially refed');
   handle.unref();
@@ -94,8 +86,6 @@ const { kStateSymbol } = require('internal/dgram');
 {
   const net = require('net');
   const server = net.createServer(() => {}).listen(0);
-  strictEqual(Object.getPrototypeOf(server._handle).hasOwnProperty('hasRef'),
-              true, 'tcp_wrap: hasRef() missing');
   strictEqual(server._handle.hasRef(),
               true, 'tcp_wrap: not initially refed');
   strictEqual(server._unref,

test/pseudo-tty/test-handle-wrap-isrefed-tty.js

@@ -8,8 +8,6 @@ const ReadStream = require('tty').ReadStream;
 const tty = new ReadStream(0);
 const isTTY = process.binding('tty_wrap').isTTY;
 strictEqual(isTTY(0), true, 'tty_wrap: stdin is not a TTY');
-strictEqual(Object.getPrototypeOf(tty._handle).hasOwnProperty('hasRef'),
-            true, 'tty_wrap: hasRef() missing');
 strictEqual(tty._handle.hasRef(),
             true, 'tty_wrap: not initially refed');
 tty.unref();