Check in CI

Author: jakebailey

.github/workflows/ci.yml

@@ -30,3 +30,12 @@ jobs:
 
     - name: Test
       run: npm test
+
+    - name: Check scripts are executable
+      run: |
+        for i in userTests/*/*.sh; do
+          if ! [[ -x "$i" ]]; then
+            echo "File $i is not executable"
+            exit 1
+          fi
+        done