add test cases

ueb08/app/src/main/java/org/example/DiceEyes.java

@@ -1,5 +1,7 @@
 package org.example;
 
+import java.util.Random;
+
 public enum DiceEyes {
     ONE(1),
     TWO(2),
@@ -8,6 +10,7 @@ public enum DiceEyes {
     FIVE(5),
     SIX(6);
 
+    static Random random = new Random();
     private final int i;
 
     DiceEyes(int i) {
@@ -16,7 +19,7 @@ public enum DiceEyes {
 
     public static DiceEyes random(){
         // In range [0,1)
-        double randDouble = Math.random();
+        double randDouble = random.nextDouble();
         // In range [0,6)
         randDouble *= 6d;
         // Round floor -> One of the integers {0, 1, 2, 3, 4, 5}

ueb08/app/src/main/java/org/example/Player.java

@@ -10,7 +10,7 @@ public class Player {
     private final String name;
     private int totalScore = 0;
     private int roundScore = 0;
-    private Dice[] dices = new Dice[]{
+    Dice[] dices = new Dice[]{
             new Dice(), new Dice(), new Dice(),
             new Dice(), new Dice(), new Dice()
     };
@@ -112,6 +112,8 @@ public class Player {
     }
 
     private String dicesToString() {
-        return Arrays.stream(dices).map(Dice::toString).collect(Collectors.joining(" "));
+        return Arrays.stream(dices)
+                .map(Dice::toString)
+                .collect(Collectors.joining(" "));
     }
 }

ueb08/app/src/test/java/org/example/GameTest.java

@@ -1,4 +0,0 @@
-package org.example;
-
-class GameTest {
-}

ueb08/app/src/test/java/org/example/PlayerTest.java

@@ -0,0 +1,46 @@
+package org.example;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Random;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class PlayerTest {
+    @Test
+    void testRandomness() {
+        // Reproducible random values o.o
+        DiceEyes.random = new Random(1337);
+        Player player;
+        String expected;
+
+        player = new Player("Player1");
+        expected = "0 + 0:  4   5   6   6   2   6 ";
+        assertEquals(expected, player.toString());
+
+        player = new Player("Player2");
+        expected = "0 + 0:  1   2   5   4   2   3 ";
+        assertEquals(expected, player.toString());
+
+        player = new Player("Player3");
+        expected = "0 + 0:  1   2   6   1   4   2 ";
+        assertEquals(expected, player.toString());
+    }
+
+    @Test
+    void testToggleAlreadyFixed() {
+        // Reproducible random values o.o
+        DiceEyes.random = new Random(1337);
+        Player player = new Player("Player1");
+
+        int diceIdx = 1;
+
+        // Manually fix one dice
+        player.dices[diceIdx].fix();
+        String expected = "0 + 50:  4  [5]  6   6   2   6 ";
+        assertEquals(expected, player.toString());
+
+        assertThrows(IllegalArgumentException.class, () -> player.toggleMark(diceIdx));
+    }
+}