fix: make help button use subforum topics (#37741)

* fix: make help button use subforum topics

* fix: add test to check that block exists

Co-authored-by: ojeytonwilliams <ojeytonwilliams@gmail.com>

* fix: improve error message

* Update curriculum/test/test-challenges.js

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

curriculum/test/test-challenges.js

@@ -36,7 +36,12 @@ const { getChallengesForLang } = require('../getChallenges');
 const MongoIds = require('./utils/mongoIds');
 const ChallengeTitles = require('./utils/challengeTitles');
 const { challengeSchemaValidator } = require('../schema/challengeSchema');
-const { challengeTypes } = require('../../client/utils/challengeTypes');
+const {
+  challengeTypes,
+  helpCategory
+} = require('../../client/utils/challengeTypes');
+
+const { dasherize } = require('../../utils/slugs');
 
 const { testedLangs } = require('../utils');
 
@@ -150,6 +155,15 @@ async function getChallenges(lang) {
   return { lang, challenges };
 }
 
+function validateBlock(challenge) {
+  const dashedBlock = dasherize(challenge.block);
+  if (!helpCategory.hasOwnProperty(dashedBlock)) {
+    return `'${dashedBlock}' block not found as a helpCategory in client/utils/challengeTypes.js file for the '${challenge.title}' challenge`;
+  } else {
+    return null;
+  }
+}
+
 function populateTestsForLang({ lang, challenges }) {
   const mongoIds = new MongoIds();
   const challengeTitles = new ChallengeTitles();
@@ -162,9 +176,14 @@ function populateTestsForLang({ lang, challenges }) {
       describe(challenge.title || 'No title', function() {
         it('Common checks', function() {
           const result = validateChallenge(challenge);
+          const invalidBlock = validateBlock(challenge);
+
           if (result.error) {
             throw new AssertionError(result.error);
           }
+          if (challenge.challengeType !== 7 && invalidBlock) {
+            throw new Error(invalidBlock);
+          }
           const { id, title } = challenge;
           mongoIds.check(id, title);
           challengeTitles.check(title);