Added updateGroupOfGame(), added docc & tests

test/db_tests/group_game_test.dart

@@ -14,7 +14,8 @@ void main() {
   late Player testPlayer3;
   late Player testPlayer4;
   late Player testPlayer5;
-  late Group testgroup;
+  late Group testGroup1;
+  late Group testGroup2;
   late Game testgameWithGroup;
   late Game testgameWithPlayers;
   final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
@@ -35,15 +36,19 @@ void main() {
       testPlayer3 = Player(name: 'Charlie');
       testPlayer4 = Player(name: 'Diana');
       testPlayer5 = Player(name: 'Eve');
-      testgroup = Group(
+      testGroup1 = Group(
         name: 'Test Group',
         members: [testPlayer1, testPlayer2, testPlayer3],
       );
+      testGroup2 = Group(
+        name: 'Test Group',
+        members: [testPlayer3, testPlayer2],
+      );
       testgameWithPlayers = Game(
         name: 'Test Game with Players',
         players: [testPlayer4, testPlayer5],
       );
-      testgameWithGroup = Game(name: 'Test Game with Group', group: testgroup);
+      testgameWithGroup = Game(name: 'Test Game with Group', group: testGroup1);
     });
   });
   tearDown(() async {
@@ -52,7 +57,7 @@ void main() {
   group('Group-Game Tests', () {
     test('Game has group works correctly', () async {
       await database.gameDao.addGame(game: testgameWithPlayers);
-      await database.groupDao.addGroup(group: testgroup);
+      await database.groupDao.addGroup(group: testGroup1);
 
       var gameHasGroup = await database.groupGameDao.gameHasGroup(
         gameId: testgameWithPlayers.id,
@@ -61,8 +66,8 @@ void main() {
       expect(gameHasGroup, false);
 
       await database.groupGameDao.addGroupToGame(
-        testgameWithPlayers.id,
-        testgroup.id,
+        gameId: testgameWithPlayers.id,
+        groupId: testGroup1.id,
       );
 
       gameHasGroup = await database.groupGameDao.gameHasGroup(
@@ -74,15 +79,15 @@ void main() {
 
     test('Adding a group to a game works correctly', () async {
       await database.gameDao.addGame(game: testgameWithPlayers);
-      await database.groupDao.addGroup(group: testgroup);
+      await database.groupDao.addGroup(group: testGroup1);
       await database.groupGameDao.addGroupToGame(
-        testgameWithPlayers.id,
-        testgroup.id,
+        gameId: testgameWithPlayers.id,
+        groupId: testGroup1.id,
       );
 
       var groupAdded = await database.groupGameDao.isGroupInGame(
         gameId: testgameWithPlayers.id,
-        groupId: testgroup.id,
+        groupId: testGroup1.id,
       );
       expect(groupAdded, true);
 
@@ -120,14 +125,55 @@ void main() {
         fail('Group should not be null');
       }
 
-      expect(group.id, testgroup.id);
-      expect(group.name, testgroup.name);
-      expect(group.createdAt, testgroup.createdAt);
-      expect(group.members.length, testgroup.members.length);
+      expect(group.id, testGroup1.id);
+      expect(group.name, testGroup1.name);
+      expect(group.createdAt, testGroup1.createdAt);
+      expect(group.members.length, testGroup1.members.length);
       for (int i = 0; i < group.members.length; i++) {
-        expect(group.members[i].id, testgroup.members[i].id);
-        expect(group.members[i].name, testgroup.members[i].name);
-        expect(group.members[i].createdAt, testgroup.members[i].createdAt);
+        expect(group.members[i].id, testGroup1.members[i].id);
+        expect(group.members[i].name, testGroup1.members[i].name);
+        expect(group.members[i].createdAt, testGroup1.members[i].createdAt);
+      }
+    });
+
+    test('Updating the group of a game works correctly', () async {
+      await database.gameDao.addGame(game: testgameWithGroup);
+
+      var group = await database.groupGameDao.getGroupOfGame(
+        gameId: testgameWithGroup.id,
+      );
+
+      if (group == null) {
+        fail('Initial group should not be null');
+      } else {
+        expect(group.id, testGroup1.id);
+        expect(group.name, testGroup1.name);
+        expect(group.createdAt, testGroup1.createdAt);
+        expect(group.members.length, testGroup1.members.length);
+      }
+
+      await database.groupDao.addGroup(group: testGroup2);
+      await database.groupGameDao.updateGroupOfGame(
+        gameId: testgameWithGroup.id,
+        newGroupId: testGroup2.id,
+      );
+
+      group = await database.groupGameDao.getGroupOfGame(
+        gameId: testgameWithGroup.id,
+      );
+
+      if (group == null) {
+        fail('Updated group should not be null');
+      } else {
+        expect(group.id, testGroup2.id);
+        expect(group.name, testGroup2.name);
+        expect(group.createdAt, testGroup2.createdAt);
+        expect(group.members.length, testGroup2.members.length);
+        for (int i = 0; i < group.members.length; i++) {
+          expect(group.members[i].id, testGroup2.members[i].id);
+          expect(group.members[i].name, testGroup2.members[i].name);
+          expect(group.members[i].createdAt, testGroup2.members[i].createdAt);
+        }
       }
     });
   });