test: check for session.post() errors in test-insepctor-context

If session.post() generates an error, it is currently ignored. Add check
for error by adding a callback to session.post() invocation.
PR-URL: #30649
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

test/sequential/test-inspector-contexts.js

@@ -5,7 +5,7 @@
 constcommon=require('../common');
 common.skipIfInspectorDisabled();
 
-const{ strictEqual }=require('assert');
+const{ifError,strictEqual }=require('assert');
 const{ createContext, runInNewContext }=require('vm');
 const{ Session }=require('inspector');
 
@@ -22,7 +22,7 @@ async function testContextCreatedAndDestroyed() {
 constmainContextPromise=
 notificationPromise('Runtime.executionContextCreated');
 
-session.post('Runtime.enable');
+session.post('Runtime.enable',assert.ifError);
 constcontextCreated=awaitmainContextPromise;
 const{ name, origin, auxData }=contextCreated.params.context;
 if(common.isSunOS||common.isWindows){
@@ -148,7 +148,7 @@ async function testContextCreatedAndDestroyed() {
 
 asyncfunctiontestBreakpointHit(){
 console.log('Testing breakpoint is hit in a new context');
-session.post('Debugger.enable');
+session.post('Debugger.enable',assert.ifError);
 
 constpausedPromise=notificationPromise('Debugger.paused');
 runInNewContext('debugger',{});