Keep tests in json format

So the results are typed
2020-08-24 18:37:55 +02:00
parent d592cc3050
commit 4d280e02b0
55 changed files with 55 additions and 329 deletions
--- a/tests_dir/max_rating_in_age_range.result
+++ b/tests_dir/max_rating_in_age_range.result
@@ -1,2 +1 @@
-id,name,chief,age,rating
-1,carl,0,20,6
+{"content": [[1, "carl", 0, 20, 6]], "header": ["id", "name", "chief", "age", "rating"]}