test: enable tests for steps (#44550)

* fix: handle missing solutions correctly

Rather than creating an [[]] the parser now creates [] which isEmpty().
This makes the test suite check the next challenge for a solution.

In addition, the logic for testing solutions was fixed.

* chore: update snapshots

* test: build new superblock in node.js-tests CI

* test: allow forward slash in superblock slug

* fix: borked tests oops

* test: ignore duplicated projects

* fix: i did not break these shaun did :)

* fix: idIndex is index of id not id

Co-authored-by: Nicholas Carrigan <nhcarrigan@gmail.com>

curriculum/schema/challengeSchema.js

@@ -4,6 +4,7 @@ Joi.objectId = require('joi-objectid')(Joi);
 const { challengeTypes } = require('../../client/utils/challenge-types');
 
 const slugRE = new RegExp('^[a-z0-9-]+$');
+const slugWithSlashRE = new RegExp('^[a-z0-9-/]+$');
 
 const fileJoi = Joi.object().keys({
   fileKey: Joi.string(),
@@ -90,8 +91,8 @@ const schema = Joi.object()
         crossDomain: Joi.bool()
       })
     ),
-    solutions: Joi.array().items(Joi.array().items(fileJoi)),
-    superBlock: Joi.string().regex(slugRE),
+    solutions: Joi.array().items(Joi.array().items(fileJoi).min(1)),
+    superBlock: Joi.string().regex(slugWithSlashRE),
     superOrder: Joi.number(),
     suborder: Joi.number(),
     tests: Joi.array().items(