Add test case for avg of empty list

jamesls · jamesls · commit 0f068f75b4f4 · 2016-12-11T09:59:24.000-08:00
Ensure you don't hit divide by zero errors.
diff --git a/tests/functions.json b/tests/functions.json
@@ -83,6 +83,10 @@
       "expression": "avg(strings)",
       "error": "invalid-type"
     },
+    {
+      "expression": "avg(empty_list)",
+      "result": null
+    },
     {
       "expression": "ceil(`1.2`)",
       "result": 2
