chore(tools/challenge-helper-scripts): migrate tests to Vitest v4 (#65963)

tools/challenge-helper-scripts/package.json

@@ -37,7 +37,7 @@
     "@total-typescript/ts-reset": "^0.6.1",
     "@types/glob": "^8.0.1",
     "@types/inquirer": "^8.2.5",
-    "@vitest/ui": "^3.2.4",
+    "@vitest/ui": "^4.0.15",
     "bson": "^7.0.0",
     "eslint": "^9.39.1",
     "glob": "^8.1.0",
@@ -45,6 +45,6 @@
     "inquirer": "8.2.6",
     "prettier": "3.2.5",
     "typescript": "5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.15"
   }
 }

tools/challenge-helper-scripts/utils.test.ts

@@ -25,7 +25,11 @@ vi.mock('gray-matter', () => {
 
 vi.mock('bson', () => {
   return {
-    ObjectId: vi.fn(() => ({ toString: () => mockChallengeId }))
+    ObjectId: vi.fn().mockImplementation(function () {
+      return {
+        toString: () => mockChallengeId
+      };
+    })
   };
 });