add bandwagoner test

Using custom types and records

bandwagoner/HINTS.md

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+# Hints
+
+## 5. Replace the coach
+
+- The record update syntax can be used to create a copy of a record but with one or more fields having a new value.
+
+## 6. Check for same team
+
+- Records have built-in structural equality, which means that records that have the same values are equal.
+
+## 7. Check if you should root for a team
+
+- The best way to execute logic based on the team's value is to use a case expression.
+- If you want to add a condition to a pattern, you can use a guard.
+- Pattern matching works for records within records.