Refactored tests in own files

lib/data/dao/game_dao.dart

@@ -18,10 +18,8 @@ class GameDao extends DatabaseAccessor<AppDatabase> with _$GameDaoMixin {
 
     return Future.wait(
       result.map((row) async {
-        final group = await db.groupGameDao.getGroupByGameId(gameId: row.id);
-        final player = await db.playerGameDao.getPlayersByGameId(
-          gameId: row.id,
-        );
+        final group = await db.groupGameDao.getGroupOfGame(gameId: row.id);
+        final player = await db.playerGameDao.getPlayersOfGame(gameId: row.id);
         return Game(
           id: row.id,
           name: row.name,
@@ -41,11 +39,11 @@ class GameDao extends DatabaseAccessor<AppDatabase> with _$GameDaoMixin {
 
     List<Player>? players;
     if (await db.playerGameDao.gameHasPlayers(gameId: gameId)) {
-      players = await db.playerGameDao.getPlayersByGameId(gameId: gameId);
+      players = await db.playerGameDao.getPlayersOfGame(gameId: gameId);
     }
     Group? group;
-    if (await db.groupGameDao.hasGameGroup(gameId: gameId)) {
-      group = await db.groupGameDao.getGroupByGameId(gameId: gameId);
+    if (await db.groupGameDao.gameHasGroup(gameId: gameId)) {
+      group = await db.groupGameDao.getGroupOfGame(gameId: gameId);
     }
 
     return Game(

lib/data/dao/group_dao.dart

@@ -16,7 +16,7 @@ class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
     final result = await query.get();
     return Future.wait(
       result.map((groupData) async {
-        final members = await db.playerGroupDao.getPlayersOfGroupById(
+        final members = await db.playerGroupDao.getPlayersOfGroup(
           groupId: groupData.id,
         );
         return Group(
@@ -34,7 +34,7 @@ class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
     final query = select(groupTable)..where((g) => g.id.equals(groupId));
     final result = await query.getSingle();
 
-    List<Player> members = await db.playerGroupDao.getPlayersOfGroupById(
+    List<Player> members = await db.playerGroupDao.getPlayersOfGroup(
       groupId: groupId,
     );
 

lib/data/dao/group_game_dao.dart

@@ -10,21 +10,18 @@ class GroupGameDao extends DatabaseAccessor<AppDatabase>
     with _$GroupGameDaoMixin {
   GroupGameDao(super.db);
 
-  /// Checks if there is a group associated with the given [gameId].
-  /// Returns `true` if there is a group, otherwise `false`.
-  Future<bool> hasGameGroup({required String gameId}) async {
-    final count =
-        await (selectOnly(groupGameTable)
-              ..where(groupGameTable.gameId.equals(gameId))
-              ..addColumns([groupGameTable.groupId.count()]))
-            .map((row) => row.read(groupGameTable.groupId.count()))
-            .getSingle();
-    return (count ?? 0) > 0;
+  /// Associates a group with a game by inserting a record into the
+  /// [GroupGameTable].
+  Future<void> addGroupToGame(String gameId, String groupId) async {
+    await into(groupGameTable).insert(
+      GroupGameTableCompanion.insert(groupId: groupId, gameId: gameId),
+      mode: InsertMode.insertOrReplace,
+    );
   }
 
   /// Retrieves the [Group] associated with the given [gameId].
   /// Returns `null` if no group is found.
-  Future<Group?> getGroupByGameId({required String gameId}) async {
+  Future<Group?> getGroupOfGame({required String gameId}) async {
     final result = await (select(
       groupGameTable,
     )..where((g) => g.gameId.equals(gameId))).getSingleOrNull();
@@ -37,11 +34,46 @@ class GroupGameDao extends DatabaseAccessor<AppDatabase>
     return group;
   }
 
-  /// Associates a group with a game by inserting a record into the
-  /// [GroupGameTable].
-  Future<void> addGroupToGame(String gameId, String groupId) async {
-    await into(
-      groupGameTable,
-    ).insert(GroupGameTableCompanion.insert(groupId: groupId, gameId: gameId), mode:  InsertMode.insertOrReplace);
+  /// Checks if there is a group associated with the given [gameId].
+  /// Returns `true` if there is a group, otherwise `false`.
+  Future<bool> gameHasGroup({required String gameId}) async {
+    final count =
+        await (selectOnly(groupGameTable)
+              ..where(groupGameTable.gameId.equals(gameId))
+              ..addColumns([groupGameTable.groupId.count()]))
+            .map((row) => row.read(groupGameTable.groupId.count()))
+            .getSingle();
+    return (count ?? 0) > 0;
+  }
+
+  /// Checks if a specific group is associated with a specific game.
+  /// Returns `true` if the group is in the game, otherwise `false`.
+  Future<bool> isGroupInGame({
+    required String gameId,
+    required String groupId,
+  }) async {
+    final count =
+        await (selectOnly(groupGameTable)
+              ..where(
+                groupGameTable.gameId.equals(gameId) &
+                    groupGameTable.groupId.equals(groupId),
+              )
+              ..addColumns([groupGameTable.groupId.count()]))
+            .map((row) => row.read(groupGameTable.groupId.count()))
+            .getSingle();
+    return (count ?? 0) > 0;
+  }
+
+  /// Removes the association of a group from a game based on [groupId] and
+  /// [gameId].
+  /// Returns `true` if more than 0 rows were affected, otherwise `false`.
+  Future<bool> removeGroupFromGame({
+    required String gameId,
+    required String groupId,
+  }) async {
+    final query = delete(groupGameTable)
+      ..where((g) => g.gameId.equals(gameId) & g.groupId.equals(groupId));
+    final rowsAffected = await query.go();
+    return rowsAffected > 0;
   }
 }

lib/data/dao/player_game_dao.dart

@@ -10,21 +10,21 @@ class PlayerGameDao extends DatabaseAccessor<AppDatabase>
     with _$PlayerGameDaoMixin {
   PlayerGameDao(super.db);
 
-  /// Checks if there are any players associated with the given [gameId].
-  /// Returns `true` if there are players, otherwise `false`.
-  Future<bool> gameHasPlayers({required String gameId}) async {
-    final count =
-        await (selectOnly(playerGameTable)
-              ..where(playerGameTable.gameId.equals(gameId))
-              ..addColumns([playerGameTable.playerId.count()]))
-            .map((row) => row.read(playerGameTable.playerId.count()))
-            .getSingle();
-    return (count ?? 0) > 0;
+  /// Associates a player with a game by inserting a record into the
+  /// [PlayerGameTable].
+  Future<void> addPlayerToGame({
+    required String gameId,
+    required String playerId,
+  }) async {
+    await into(playerGameTable).insert(
+      PlayerGameTableCompanion.insert(playerId: playerId, gameId: gameId),
+      mode: InsertMode.insertOrReplace,
+    );
   }
 
   /// Retrieves a list of [Player]s associated with the given [gameId].
   /// Returns null if no players are found.
-  Future<List<Player>?> getPlayersByGameId({required String gameId}) async {
+  Future<List<Player>?> getPlayersOfGame({required String gameId}) async {
     final result = await (select(
       playerGameTable,
     )..where((p) => p.gameId.equals(gameId))).get();
@@ -38,15 +38,45 @@ class PlayerGameDao extends DatabaseAccessor<AppDatabase>
     return players;
   }
 
-  /// Associates a player with a game by inserting a record into the
-  /// [PlayerGameTable].
-  Future<void> addPlayerToGame({
+  /// Checks if there are any players associated with the given [gameId].
+  /// Returns `true` if there are players, otherwise `false`.
+  Future<bool> gameHasPlayers({required String gameId}) async {
+    final count =
+        await (selectOnly(playerGameTable)
+              ..where(playerGameTable.gameId.equals(gameId))
+              ..addColumns([playerGameTable.playerId.count()]))
+            .map((row) => row.read(playerGameTable.playerId.count()))
+            .getSingle();
+    return (count ?? 0) > 0;
+  }
+
+  /// Checks if a specific player is associated with a specific game.
+  /// Returns `true` if the player is in the game, otherwise `false`.
+  Future<bool> isPlayerInGame({
     required String gameId,
     required String playerId,
   }) async {
-    await into(playerGameTable).insert(
-      PlayerGameTableCompanion.insert(playerId: playerId, gameId: gameId),
-      mode: InsertMode.insertOrReplace,
-    );
+    final count =
+        await (selectOnly(playerGameTable)
+              ..where(playerGameTable.gameId.equals(gameId))
+              ..where(playerGameTable.playerId.equals(playerId))
+              ..addColumns([playerGameTable.playerId.count()]))
+            .map((row) => row.read(playerGameTable.playerId.count()))
+            .getSingle();
+    return (count ?? 0) > 0;
+  }
+
+  /// Removes the association of a player with a game by deleting the record
+  /// from the [PlayerGameTable].
+  /// Returns `true` if more than 0 rows were affected, otherwise `false`.
+  Future<bool> removePlayerFromGame({
+    required String gameId,
+    required String playerId,
+  }) async {
+    final query = delete(playerGameTable)
+      ..where((pg) => pg.gameId.equals(gameId))
+      ..where((pg) => pg.playerId.equals(playerId));
+    final rowsAffected = await query.go();
+    return rowsAffected > 0;
   }
 }

lib/data/dao/player_group_dao.dart

@@ -10,8 +10,31 @@ class PlayerGroupDao extends DatabaseAccessor<AppDatabase>
     with _$PlayerGroupDaoMixin {
   PlayerGroupDao(super.db);
 
+  /// Adds a [player] to a group with the given [groupId].
+  /// If the player is already in the group, no action is taken.
+  /// If the player does not exist in the player table, they are added.
+  /// Returns `true` if the player was added, otherwise `false`.
+  Future<bool> addPlayerToGroup({
+    required Player player,
+    required String groupId,
+  }) async {
+    if (await isPlayerInGroup(playerId: player.id, groupId: groupId)) {
+      return false;
+    }
+
+    if (await db.playerDao.playerExists(playerId: player.id) == false) {
+      db.playerDao.addPlayer(player: player);
+    }
+
+    await into(playerGroupTable).insert(
+      PlayerGroupTableCompanion.insert(playerId: player.id, groupId: groupId),
+    );
+
+    return true;
+  }
+
   /// Retrieves all players belonging to a specific group by [groupId].
-  Future<List<Player>> getPlayersOfGroupById({required String groupId}) async {
+  Future<List<Player>> getPlayersOfGroup({required String groupId}) async {
     final query = select(playerGroupTable)
       ..where((pG) => pG.groupId.equals(groupId));
     final result = await query.get();
@@ -38,29 +61,6 @@ class PlayerGroupDao extends DatabaseAccessor<AppDatabase>
     return rowsAffected > 0;
   }
 
-  /// Adds a [player] to a group with the given [groupId].
-  /// If the player is already in the group, no action is taken.
-  /// If the player does not exist in the player table, they are added.
-  /// Returns `true` if the player was added, otherwise `false`.
-  Future<bool> addPlayerToGroup({
-    required Player player,
-    required String groupId,
-  }) async {
-    if (await isPlayerInGroup(playerId: player.id, groupId: groupId)) {
-      return false;
-    }
-
-    if (await db.playerDao.playerExists(playerId: player.id) == false) {
-      db.playerDao.addPlayer(player: player);
-    }
-
-    await into(playerGroupTable).insert(
-      PlayerGroupTableCompanion.insert(playerId: player.id, groupId: groupId),
-    );
-
-    return true;
-  }
-
   /// Checks if a player with [playerId] is in the group with [groupId].
   /// Returns `true` if the player is in the group, otherwise `false`.
   Future<bool> isPlayerInGroup({

test/db_tests/game_test.dart

@@ -16,8 +16,10 @@ void main() {
   late Player player5;
   late Group testgroup;
   late Group testgroup2;
-  late Game testgame;
+  late Game testgame1;
   late Game testgame2;
+  late Game testgameWithPlayer;
+  late Game testgameWithGroup;
   final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
   final fakeClock = Clock(() => fixedDate);
 
@@ -37,14 +39,11 @@ void main() {
       player4 = Player(name: 'Diana');
       player5 = Player(name: 'Eve');
       testgroup = Group(
-        name: 'Test Group',
+        name: 'Test Group 2',
         members: [player1, player2, player3],
       );
-      testgroup2 = Group(
-        name: 'Test Group',
-        members: [player1, player2, player3],
-      );
-      testgame = Game(
+      testgroup2 = Group(name: 'Test Group 2', members: [player4, player5]);
+      testgame1 = Game(
         name: 'Test Game',
         group: testgroup,
         players: [player4, player5],
@@ -54,6 +53,11 @@ void main() {
         group: testgroup2,
         players: [player1, player2, player3],
       );
+      testgameWithPlayer = Game(
+        name: 'Second Test Game',
+        players: [player1, player2, player3],
+      );
+      testgameWithGroup = Game(name: 'Second Test Game', group: testgroup2);
     });
   });
   tearDown(() async {
@@ -62,14 +66,14 @@ void main() {
 
   group('Game Tests', () {
     test('Adding and fetching single game works correclty', () async {
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
 
-      final result = await database.gameDao.getGameById(gameId: testgame.id);
+      final result = await database.gameDao.getGameById(gameId: testgame1.id);
 
-      expect(result.id, testgame.id);
-      expect(result.name, testgame.name);
-      expect(result.winner, testgame.winner);
-      expect(result.createdAt, testgame.createdAt);
+      expect(result.id, testgame1.id);
+      expect(result.name, testgame1.name);
+      expect(result.winner, testgame1.winner);
+      expect(result.createdAt, testgame1.createdAt);
 
       if (result.group != null) {
         expect(result.group!.members.length, testgroup.members.length);
@@ -82,12 +86,12 @@ void main() {
         fail('Group is null');
       }
       if (result.players != null) {
-        expect(result.players!.length, testgame.players!.length);
+        expect(result.players!.length, testgame1.players!.length);
 
-        for (int i = 0; i < testgame.players!.length; i++) {
-          expect(result.players![i].id, testgame.players![i].id);
-          expect(result.players![i].name, testgame.players![i].name);
-          expect(result.players![i].createdAt, testgame.players![i].createdAt);
+        for (int i = 0; i < testgame1.players!.length; i++) {
+          expect(result.players![i].id, testgame1.players![i].id);
+          expect(result.players![i].name, testgame1.players![i].name);
+          expect(result.players![i].createdAt, testgame1.players![i].createdAt);
         }
       } else {
         fail('Players is null');
@@ -95,51 +99,54 @@ void main() {
     });
 
     // TODO: Use upcoming addGames() method
+    // TODO: Iterate through games
     test('Adding and fetching multiple games works correclty', () async {
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
       await database.gameDao.addGame(game: testgame2);
+      await database.gameDao.addGame(game: testgameWithGroup);
+      await database.gameDao.addGame(game: testgameWithPlayer);
 
       final allGames = await database.gameDao.getAllGames();
-      expect(allGames.length, 2);
+      expect(allGames.length, 4);
 
-      final fetchedGame1 = allGames.firstWhere((g) => g.id == testgame.id);
+      final fetchedGame1 = allGames.firstWhere((g) => g.id == testgame1.id);
       // game checks
-      expect(fetchedGame1.id, testgame.id);
-      expect(fetchedGame1.name, testgame.name);
-      expect(fetchedGame1.createdAt, testgame.createdAt);
-      expect(fetchedGame1.winner, testgame.winner);
+      expect(fetchedGame1.id, testgame1.id);
+      expect(fetchedGame1.name, testgame1.name);
+      expect(fetchedGame1.createdAt, testgame1.createdAt);
+      expect(fetchedGame1.winner, testgame1.winner);
 
       // group checks
-      expect(fetchedGame1.group!.id, testgame.group!.id);
-      expect(fetchedGame1.group!.name, testgame.group!.name);
-      expect(fetchedGame1.group!.createdAt, testgame.group!.createdAt);
+      expect(fetchedGame1.group!.id, testgame1.group!.id);
+      expect(fetchedGame1.group!.name, testgame1.group!.name);
+      expect(fetchedGame1.group!.createdAt, testgame1.group!.createdAt);
       // group members checks
       expect(
         fetchedGame1.group!.members.length,
-        testgame.group!.members.length,
+        testgame1.group!.members.length,
       );
-      for (int i = 0; i < testgame.group!.members.length; i++) {
+      for (int i = 0; i < testgame1.group!.members.length; i++) {
         expect(
           fetchedGame1.group!.members[i].id,
-          testgame.group!.members[i].id,
+          testgame1.group!.members[i].id,
         );
         expect(
           fetchedGame1.group!.members[i].name,
-          testgame.group!.members[i].name,
+          testgame1.group!.members[i].name,
         );
         expect(
           fetchedGame1.group!.members[i].createdAt,
-          testgame.group!.members[i].createdAt,
+          testgame1.group!.members[i].createdAt,
         );
       }
 
       // players checks
       for (int i = 0; i < fetchedGame1.players!.length; i++) {
-        expect(fetchedGame1.players![i].id, testgame.players![i].id);
-        expect(fetchedGame1.players![i].name, testgame.players![i].name);
+        expect(fetchedGame1.players![i].id, testgame1.players![i].id);
+        expect(fetchedGame1.players![i].name, testgame1.players![i].name);
         expect(
           fetchedGame1.players![i].createdAt,
-          testgame.players![i].createdAt,
+          testgame1.players![i].createdAt,
         );
       }
 
@@ -186,32 +193,34 @@ void main() {
     });
 
     test('Adding the same game twice does not create duplicates', () async {
-      await database.gameDao.addGame(game: testgame);
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
+      await database.gameDao.addGame(game: testgame1);
 
       final gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 1);
     });
 
     test('Game existence check works correctly', () async {
-      var gameExists = await database.gameDao.gameExists(gameId: testgame.id);
+      var gameExists = await database.gameDao.gameExists(gameId: testgame1.id);
       expect(gameExists, false);
 
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
 
-      gameExists = await database.gameDao.gameExists(gameId: testgame.id);
+      gameExists = await database.gameDao.gameExists(gameId: testgame1.id);
       expect(gameExists, true);
     });
 
     test('Deleting a game works correclty', () async {
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
 
       final gameDeleted = await database.gameDao.deleteGame(
-        gameId: testgame.id,
+        gameId: testgame1.id,
       );
       expect(gameDeleted, true);
 
-      final gameExists = await database.gameDao.gameExists(gameId: testgame.id);
+      final gameExists = await database.gameDao.gameExists(
+        gameId: testgame1.id,
+      );
       expect(gameExists, false);
     });
 
@@ -219,7 +228,7 @@ void main() {
       var gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 0);
 
-      await database.gameDao.addGame(game: testgame);
+      await database.gameDao.addGame(game: testgame1);
 
       gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 1);
@@ -229,7 +238,7 @@ void main() {
       gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 2);
 
-      await database.gameDao.deleteGame(gameId: testgame.id);
+      await database.gameDao.deleteGame(gameId: testgame1.id);
 
       gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 1);
@@ -239,11 +248,5 @@ void main() {
       gameCount = await database.gameDao.getGameCount();
       expect(gameCount, 0);
     });
-
-    // TODO: Implement
-    test('Adding a player to a game works correclty', () async {});
-
-    // TODO: Implement
-    test('Adding a group to a game works correclty', () async {});
   });
 }

test/db_tests/group_game_test.dart

@@ -0,0 +1,110 @@
+import 'package:clock/clock.dart';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/dto/game.dart';
+import 'package:game_tracker/data/dto/group.dart';
+import 'package:game_tracker/data/dto/player.dart';
+
+void main() {
+  late AppDatabase database;
+  late Player player1;
+  late Player player2;
+  late Player player3;
+  late Player player4;
+  late Player player5;
+  late Group testgroup;
+  late Game gameWithGroup;
+  late Game gameWithPlayers;
+  final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
+  final fakeClock = Clock(() => fixedDate);
+
+  setUp(() {
+    database = AppDatabase(
+      DatabaseConnection(
+        NativeDatabase.memory(),
+        // Recommended for widget tests to avoid test errors.
+        closeStreamsSynchronously: true,
+      ),
+    );
+
+    withClock(fakeClock, () {
+      player1 = Player(name: 'Alice');
+      player2 = Player(name: 'Bob');
+      player3 = Player(name: 'Charlie');
+      player4 = Player(name: 'Diana');
+      player5 = Player(name: 'Eve');
+      testgroup = Group(
+        name: 'Test Group',
+        members: [player1, player2, player3],
+      );
+      gameWithPlayers = Game(
+        name: 'Game with Players',
+        players: [player4, player5],
+      );
+      gameWithGroup = Game(name: 'Game with Group', group: testgroup);
+    });
+  });
+  tearDown(() async {
+    await database.close();
+  });
+  group('Group-Game Tests', () {
+    test('Game has group works correctly', () async {
+      database.gameDao.addGame(game: gameWithPlayers);
+      database.groupDao.addGroup(group: testgroup);
+
+      var gameHasGroup = await database.groupGameDao.gameHasGroup(
+        gameId: gameWithPlayers.id,
+      );
+
+      expect(gameHasGroup, false);
+
+      database.groupGameDao.addGroupToGame(gameWithPlayers.id, testgroup.id);
+
+      gameHasGroup = await database.groupGameDao.gameHasGroup(
+        gameId: gameWithPlayers.id,
+      );
+
+      expect(gameHasGroup, true);
+    });
+
+    test('Adding a group to a game works correctly', () async {
+      database.gameDao.addGame(game: gameWithPlayers);
+      database.groupDao.addGroup(group: testgroup);
+      database.groupGameDao.addGroupToGame(gameWithPlayers.id, testgroup.id);
+
+      var groupAdded = await database.groupGameDao.isGroupInGame(
+        gameId: gameWithPlayers.id,
+        groupId: testgroup.id,
+      );
+      expect(groupAdded, true);
+
+      groupAdded = await database.groupGameDao.isGroupInGame(
+        gameId: gameWithPlayers.id,
+        groupId: '',
+      );
+      expect(groupAdded, false);
+    });
+
+    test('Removing group from game works correctly', () async {
+      await database.gameDao.addGame(game: gameWithGroup);
+
+      final groupToRemove = gameWithGroup.group!;
+
+      final removed = await database.groupGameDao.removeGroupFromGame(
+        groupId: groupToRemove.id,
+        gameId: gameWithGroup.id,
+      );
+      expect(removed, true);
+
+      final result = await database.gameDao.getGameById(
+        gameId: gameWithGroup.id,
+      );
+      expect(result.group, null);
+    });
+
+    // TODO: test getGroupOfGame()
+    test('Retrieving group of a game works correctly', () async {});
+  });
+}

test/db_tests/group_test.dart

@@ -68,7 +68,6 @@ void main() {
       }
     });
 
-    // TODO: Use upcoming addGroups() method
     test('Adding and fetching a single group works correctly', () async {
       await database.groupDao.addGroup(group: testgroup);
       await database.groupDao.addGroup(group: testgroup2);
@@ -89,6 +88,8 @@ void main() {
       expect(fetchedGroup2.members.elementAt(0).createdAt, player2.createdAt);
     });
 
+    // TODO: Use upcoming addGroups() method
+    // TODO: An Test in Game Tests orientieren
     test('Adding the same group twice does not create duplicates', () async {
       await database.groupDao.addGroup(group: testgroup);
       await database.groupDao.addGroup(group: testgroup);
@@ -139,58 +140,6 @@ void main() {
       expect(result.name, newGroupName);
     });
 
-    test('Adding player to group works correctly', () async {
-      await database.groupDao.addGroup(group: testgroup);
-
-      await database.playerGroupDao.addPlayerToGroup(
-        player: player4,
-        groupId: testgroup.id,
-      );
-
-      final playerAdded = await database.playerGroupDao.isPlayerInGroup(
-        playerId: player4.id,
-        groupId: testgroup.id,
-      );
-
-      expect(playerAdded, true);
-
-      final playerNotAdded = !await database.playerGroupDao.isPlayerInGroup(
-        playerId: '',
-        groupId: testgroup.id,
-      );
-
-      expect(playerNotAdded, true);
-
-      final result = await database.groupDao.getGroupById(
-        groupId: testgroup.id,
-      );
-      expect(result.members.length, testgroup.members.length + 1);
-
-      final addedPlayer = result.members.firstWhere((p) => p.id == player4.id);
-      expect(addedPlayer.name, player4.name);
-      expect(addedPlayer.createdAt, player4.createdAt);
-    });
-
-    test('Removing player from group works correctly', () async {
-      await database.groupDao.addGroup(group: testgroup);
-
-      final playerToRemove = testgroup.members[0];
-
-      final removed = await database.playerGroupDao.removePlayerFromGroup(
-        playerId: playerToRemove.id,
-        groupId: testgroup.id,
-      );
-      expect(removed, true);
-
-      final result = await database.groupDao.getGroupById(
-        groupId: testgroup.id,
-      );
-      expect(result.members.length, testgroup.members.length - 1);
-
-      final playerExists = result.members.any((p) => p.id == playerToRemove.id);
-      expect(playerExists, false);
-    });
-
     test('Getting the group count works correctly', () async {
       final initialCount = await database.groupDao.getGroupCount();
       expect(initialCount, 0);

test/db_tests/player_game_test.dart

@@ -0,0 +1,126 @@
+import 'package:clock/clock.dart';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/dto/game.dart';
+import 'package:game_tracker/data/dto/group.dart';
+import 'package:game_tracker/data/dto/player.dart';
+
+void main() {
+  late AppDatabase database;
+  late Player player1;
+  late Player player2;
+  late Player player3;
+  late Player player4;
+  late Player player5;
+  late Player player6;
+  late Group testgroup;
+  late Game testgameWithGroup;
+  late Game testgameWithPlayers;
+  final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
+  final fakeClock = Clock(() => fixedDate);
+
+  setUp(() {
+    database = AppDatabase(
+      DatabaseConnection(
+        NativeDatabase.memory(),
+        // Recommended for widget tests to avoid test errors.
+        closeStreamsSynchronously: true,
+      ),
+    );
+
+    withClock(fakeClock, () {
+      player1 = Player(name: 'Alice');
+      player2 = Player(name: 'Bob');
+      player3 = Player(name: 'Charlie');
+      player4 = Player(name: 'Diana');
+      player5 = Player(name: 'Eve');
+      player6 = Player(name: 'Frank');
+      testgroup = Group(
+        name: 'Test Group',
+        members: [player1, player2, player3],
+      );
+      testgameWithGroup = Game(name: 'Test Game', group: testgroup);
+      testgameWithPlayers = Game(
+        name: 'Test Game with Players',
+        players: [player4, player5, player6],
+      );
+    });
+  });
+  tearDown(() async {
+    await database.close();
+  });
+
+  group('Player-Game Tests', () {
+    test('Game has player works correctly', () async {
+      database.gameDao.addGame(game: testgameWithGroup);
+      database.playerDao.addPlayer(player: player1);
+
+      var gameHasPlayers = await database.playerGameDao.gameHasPlayers(
+        gameId: testgameWithGroup.id,
+      );
+
+      expect(gameHasPlayers, false);
+
+      database.playerGameDao.addPlayerToGame(
+        gameId: testgameWithGroup.id,
+        playerId: player1.id,
+      );
+
+      gameHasPlayers = await database.playerGameDao.gameHasPlayers(
+        gameId: testgameWithGroup.id,
+      );
+
+      expect(gameHasPlayers, true);
+    });
+
+    test('Adding a player to a game works correctly', () async {
+      database.gameDao.addGame(game: testgameWithGroup);
+      database.playerDao.addPlayer(player: player5);
+      database.playerGameDao.addPlayerToGame(
+        gameId: testgameWithGroup.id,
+        playerId: player5.id,
+      );
+
+      var playerAdded = await database.playerGameDao.isPlayerInGame(
+        gameId: testgameWithGroup.id,
+        playerId: player5.id,
+      );
+
+      expect(playerAdded, true);
+
+      playerAdded = await database.playerGameDao.isPlayerInGame(
+        gameId: testgameWithGroup.id,
+        playerId: '',
+      );
+
+      expect(playerAdded, false);
+    });
+
+    test('Removing player from game works correctly', () async {
+      await database.gameDao.addGame(game: testgameWithPlayers);
+
+      final playerToRemove = testgameWithPlayers.players![0];
+
+      final removed = await database.playerGameDao.removePlayerFromGame(
+        playerId: playerToRemove.id,
+        gameId: testgameWithPlayers.id,
+      );
+      expect(removed, true);
+
+      final result = await database.gameDao.getGameById(
+        gameId: testgameWithGroup.id,
+      );
+      expect(result.players!.length, testgameWithGroup.players!.length - 1);
+
+      final playerExists = result.players!.any(
+        (p) => p.id == playerToRemove.id,
+      );
+      expect(playerExists, false);
+    });
+
+    //TODO: test getPlayersOfGame()
+    test('Retrieving players of a game works correctly', () async {});
+  });
+}

test/db_tests/player_group_test.dart

@@ -0,0 +1,90 @@
+import 'package:clock/clock.dart';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/dto/group.dart';
+import 'package:game_tracker/data/dto/player.dart';
+
+void main() {
+  late AppDatabase database;
+  late Player player1;
+  late Player player2;
+  late Player player3;
+  late Player player4;
+  late Group testgroup;
+  final fixedDate = DateTime(2025, 19, 11, 00, 11, 23);
+  final fakeClock = Clock(() => fixedDate);
+
+  setUp(() {
+    database = AppDatabase(
+      DatabaseConnection(
+        NativeDatabase.memory(),
+        // Recommended for widget tests to avoid test errors.
+        closeStreamsSynchronously: true,
+      ),
+    );
+
+    withClock(fakeClock, () {
+      player1 = Player(name: 'Alice');
+      player2 = Player(name: 'Bob');
+      player3 = Player(name: 'Charlie');
+      player4 = Player(name: 'Diana');
+      testgroup = Group(
+        name: 'Test Group',
+        members: [player1, player2, player3],
+      );
+    });
+  });
+  tearDown(() async {
+    await database.close();
+  });
+
+  group('Player-Group Tests', () {
+    test('Adding a player to a group works correctly', () async {
+      await database.groupDao.addGroup(group: testgroup);
+      await database.playerDao.addPlayer(player: player4);
+      await database.playerGroupDao.addPlayerToGroup(
+        groupId: testgroup.id,
+        player: player4,
+      );
+
+      var playerAdded = await database.playerGroupDao.isPlayerInGroup(
+        groupId: testgroup.id,
+        playerId: player4.id,
+      );
+
+      expect(playerAdded, true);
+
+      playerAdded = await database.playerGroupDao.isPlayerInGroup(
+        groupId: testgroup.id,
+        playerId: '',
+      );
+
+      expect(playerAdded, false);
+    });
+
+    test('Removing player from group works correctly', () async {
+      await database.groupDao.addGroup(group: testgroup);
+
+      final playerToRemove = testgroup.members[0];
+
+      final removed = await database.playerGroupDao.removePlayerFromGroup(
+        playerId: playerToRemove.id,
+        groupId: testgroup.id,
+      );
+      expect(removed, true);
+
+      final result = await database.groupDao.getGroupById(
+        groupId: testgroup.id,
+      );
+      expect(result.members.length, testgroup.members.length - 1);
+
+      final playerExists = result.members.any((p) => p.id == playerToRemove.id);
+      expect(playerExists, false);
+    });
+
+    //TODO: test getPlayersOfGroup()
+    test('Retrieving players of a group works correctly', () async {});
+  });
+}

test/db_tests/player_test.dart

@@ -23,7 +23,7 @@ void main() {
 
     withClock(fakeClock, () {
       testPlayer = Player(name: 'Test Player');
-      testPlayer2 = Player(name: 'Second Group');
+      testPlayer2 = Player(name: 'Second Player');
     });
   });
   tearDown(() async {
@@ -52,6 +52,7 @@ void main() {
     });
 
     // TODO: Use upcoming addPlayers() method
+    // TODO: An Tests in Game orientieren
     test('Adding and fetching multiple players works correclty', () async {
       await database.playerDao.addPlayer(player: testPlayer);
       await database.playerDao.addPlayer(player: testPlayer2);