Refactor(Tests): Add proper (pp1 tests) unit tests for all logic ADTs

Tests for Positie, Doolhof, Pac-Man, Score, and Tijdslimiet ADTs
using check/check-eq?/run-test from (pp1 tests) library.
Centralized test runner in alle-testen.rkt with prefix imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pacman-project/tests/test-score.rkt

@@ -0,0 +1,30 @@
+#lang r7rs
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;                            Tests: Score ADT                               ;;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define-library (pacman-project tests test-score)
+  (import (scheme base)
+          (pp1 tests)
+          (pacman-project adt-score))
+  (export test)
+
+  (begin
+
+    ;; Test startscore
+    (define (test-startscore)
+      (define s (maak-score))
+      (check-eq? (s 'punten) 0 "Startscore moet 0 zijn"))
+
+    ;; Test score verhoging
+    (define (test-verhoog)
+      (define s (maak-score))
+      ((s 'verhoog!))
+      (check-eq? (s 'punten) 10 "Score moet 10 zijn na 1 muntje")
+      ((s 'verhoog!))
+      (check-eq? (s 'punten) 20 "Score moet 20 zijn na 2 muntjes"))
+
+    (define (test)
+      (run-test test-startscore "Score: startscore")
+      (run-test test-verhoog "Score: verhoging"))))