test: add tests for Socket.setNoDelay

PR-URL: #24250 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: James Herrington

test/parallel/test-net-socket-setnodelay.js

@@ -0,0 +1,43 @@
+'use strict';
+
+constcommon=require('../common');
+constassert=require('assert');
+constnet=require('net');
+
+consttruthyValues=[true,1,'true',{},[]];
+constfalseyValues=[false,0,''];
+constgenSetNoDelay=(desiredArg)=>(enable)=>{
+assert.strictEqual(enable,desiredArg);
+};
+
+// setNoDelay should default to true
+letsocket=newnet.Socket({
+handle: {
+setNoDelay: common.mustCall(genSetNoDelay(true))
+}
+});
+socket.setNoDelay();
+
+socket=newnet.Socket({
+handle: {
+setNoDelay: common.mustCall(genSetNoDelay(true),truthyValues.length)
+}
+});
+truthyValues.forEach((testVal)=>socket.setNoDelay(testVal));
+
+socket=newnet.Socket({
+handle: {
+setNoDelay: common.mustCall(genSetNoDelay(false),falseyValues.length)
+}
+});
+falseyValues.forEach((testVal)=>socket.setNoDelay(testVal));
+
+// if a handler doesn't have a setNoDelay function it shouldn't be called.
+// In the case below, if it is called an exception will be thrown
+socket=newnet.Socket({
+handle: {
+setNoDelay: null
+}
+});
+constreturned=socket.setNoDelay(true);
+assert.ok(returnedinstanceofnet.Socket);