From 03529d08e743599bf42ccd811c3f46a3ea79ce7c Mon Sep 17 00:00:00 2001
From: Pedro Rolo <pedrorolo@gmail.com>
Date: Fri, 11 Dec 2020 16:07:28 +0000
Subject: [PATCH] Grade school exercise: A student cannot simultaneously be in
 two grades since the users' names are unique (#1735)

---
 exercises/grade-school/canonical-data.json | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/exercises/grade-school/canonical-data.json b/exercises/grade-school/canonical-data.json
index a17f90baaa..61f78ac529 100644
--- a/exercises/grade-school/canonical-data.json
+++ b/exercises/grade-school/canonical-data.json
@@ -14,6 +14,19 @@
             },
             "expected": ["Aimee"]
         },
+        {
+          "uuid": "dece43c8-3ba5-11eb-8fdf-7f8daeaeb5f2",
+          "description": "A student can't be in two different grades",
+          "property": "roster",
+          "input": {
+            "students": [
+              ["Aimee", 2],
+              ["Aimee", 1]
+            ],
+            "desiredGrade": 2
+          },
+          "expected": []
+        },
         {
             "uuid": "233be705-dd58-4968-889d-fb3c7954c9cc",
             "description": "Adding more students adds them to the sorted roster",