feat: finished JUnit testing part

src/test/java/hepia/GameManagerTest.java

@@ -2,9 +2,8 @@ package hepia;
 
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 public class GameManagerTest {
 
@@ -17,4 +16,44 @@ public class GameManagerTest {
 
         assertThrows(RuntimeException.class, () -> new GameManager(Game.BLACKJACK, nbHumanPlayers, nbBasicAi, nbAdvancedAi, nbDecks));
     }
+
+    @Test
+    public void invalidDecks() {
+        int nbHumanPlayers = 4;
+        int nbBasicAi = 1;
+        int nbAdvancedAi = 1;
+        int nbDecks = -1;
+
+        assertThrows(RuntimeException.class, () -> new GameManager(Game.BLACKJACK, nbHumanPlayers, nbBasicAi, nbAdvancedAi, nbDecks));
+    }
+
+    @Test
+    public void invalidNumberAdvancedAiPlayers() {
+        int nbHumanPlayers = 4;
+        int nbBasicAi = 1;
+        int nbAdvancedAi = 10;
+        int nbDecks = 5;
+
+        assertThrows(IllegalArgumentException.class, () -> new GameManager(Game.BLACKJACK, nbHumanPlayers, nbBasicAi, nbAdvancedAi, nbDecks));
+    }
+
+    @Test
+    public void invalidNumberBasicAiPlayers() {
+        int nbHumanPlayers = 4;
+        int nbBasicAi = -3;
+        int nbAdvancedAi = 2;
+        int nbDecks = 5;
+
+        assertThrows(IllegalArgumentException.class, () -> new GameManager(Game.BLACKJACK, nbHumanPlayers, nbBasicAi, nbAdvancedAi, nbDecks));
+    }
+
+    @Test
+    public void successfulGameManagerCreation() {
+        int nbHumanPlayers = 3;
+        int nbBasicAi = 2;
+        int nbAdvancedAi = 2;
+        int nbDecks = 5;
+
+        assertDoesNotThrow(() -> new GameManager(Game.BLACKJACK, nbHumanPlayers, nbBasicAi, nbAdvancedAi, nbDecks));
+    }
 }