lib/data/dao/group_dao.dart

@@ -12,43 +12,7 @@ part 'group_dao.g.dart';
 class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
   GroupDao(super.db);
 
-  /// Retrieves all groups from the database.
+  /* Create */
-  Future<List<Group>> getAllGroups() async {
-    final query = select(groupTable);
-    final result = await query.get();
-    return Future.wait(
-      result.map((groupData) async {
-        final members = await db.playerGroupDao.getPlayersOfGroup(
-          groupId: groupData.id,
-        );
-        return Group(
-          id: groupData.id,
-          name: groupData.name,
-          description: groupData.description,
-          members: members,
-          createdAt: groupData.createdAt,
-        );
-      }),
-    );
-  }
-
-  /// Retrieves a [Group] by its [groupId], including its members.
-  Future<Group> getGroupById({required String groupId}) async {
-    final query = select(groupTable)..where((g) => g.id.equals(groupId));
-    final result = await query.getSingle();
-
-    List<Player> members = await db.playerGroupDao.getPlayersOfGroup(
-      groupId: groupId,
-    );
-
-    return Group(
-      id: result.id,
-      name: result.name,
-      description: result.description,
-      members: members,
-      createdAt: result.createdAt,
-    );
-  }
 
   /// Adds a new group with the given [id] and [name] to the database.
   /// This method also adds the group's members to the [PlayerGroupTable].
@@ -172,6 +136,65 @@ class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
     });
   }
 
+  /* Read */
+
+  /// Retrieves all groups from the database.
+  Future<List<Group>> getAllGroups() async {
+    final query = select(groupTable);
+    final result = await query.get();
+    return Future.wait(
+      result.map((groupData) async {
+        final members = await db.playerGroupDao.getPlayersOfGroup(
+          groupId: groupData.id,
+        );
+        return Group(
+          id: groupData.id,
+          name: groupData.name,
+          description: groupData.description,
+          members: members,
+          createdAt: groupData.createdAt,
+        );
+      }),
+    );
+  }
+
+  /// Retrieves a [Group] by its [groupId], including its members.
+  Future<Group> getGroupById({required String groupId}) async {
+    final query = select(groupTable)..where((g) => g.id.equals(groupId));
+    final result = await query.getSingle();
+
+    List<Player> members = await db.playerGroupDao.getPlayersOfGroup(
+      groupId: groupId,
+    );
+
+    return Group(
+      id: result.id,
+      name: result.name,
+      description: result.description,
+      members: members,
+      createdAt: result.createdAt,
+    );
+  }
+
+  /// Retrieves the number of groups in the database.
+  Future<int> getGroupCount() async {
+    final count =
+        await (selectOnly(groupTable)..addColumns([groupTable.id.count()]))
+            .map((row) => row.read(groupTable.id.count()))
+            .getSingle();
+    return count ?? 0;
+  }
+
+  /// Checks if a group with the given [groupId] exists in the database.
+  /// Returns `true` if the group exists, `false` otherwise.
+  Future<bool> groupExists({required String groupId}) async {
+    final query = select(groupTable)..where((g) => g.id.equals(groupId));
+    final result = await query.getSingleOrNull();
+    return result != null;
+  }
+
+  /* Delete */
+
   /// Deletes the group with the given [id] from the database.
   /// Returns `true` if more than 0 rows were affected, otherwise `false`.
   Future<bool> deleteGroup({required String groupId}) async {
@@ -180,6 +203,16 @@ class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
     return rowsAffected > 0;
   }
 
+  /// Deletes all groups from the database.
+  /// Returns `true` if more than 0 rows were affected, otherwise `false`.
+  Future<bool> deleteAllGroups() async {
+    final query = delete(groupTable);
+    final rowsAffected = await query.go();
+    return rowsAffected > 0;
+  }
+
+  /* Update */
+
   /// Updates the name of the group with the given [id] to [newName].
   /// Returns `true` if more than 0 rows were affected, otherwise `false`.
   Future<bool> updateGroupName({
@@ -206,31 +239,6 @@ class GroupDao extends DatabaseAccessor<AppDatabase> with _$GroupDaoMixin {
     return rowsAffected > 0;
   }
 
-  /// Retrieves the number of groups in the database.
-  Future<int> getGroupCount() async {
-    final count =
-        await (selectOnly(groupTable)..addColumns([groupTable.id.count()]))
-            .map((row) => row.read(groupTable.id.count()))
-            .getSingle();
-    return count ?? 0;
-  }
-
-  /// Checks if a group with the given [groupId] exists in the database.
-  /// Returns `true` if the group exists, `false` otherwise.
-  Future<bool> groupExists({required String groupId}) async {
-    final query = select(groupTable)..where((g) => g.id.equals(groupId));
-    final result = await query.getSingleOrNull();
-    return result != null;
-  }
-
-  /// Deletes all groups from the database.
-  /// Returns `true` if more than 0 rows were affected, otherwise `false`.
-  Future<bool> deleteAllGroups() async {
-    final query = delete(groupTable);
-    final rowsAffected = await query.go();
-    return rowsAffected > 0;
-  }
-
   /// Replaces all players in a group with the provided list of players.
   /// Removes all existing players from the group and adds the new players.
   /// Also adds any new players to the player table if they don't exist.

test/db_tests/aggregates/group_test.dart

@@ -35,25 +35,23 @@ void main() {
       testPlayer4 = Player(name: 'Diana');
       testGroup1 = Group(
         name: 'Test Group',
-        description: '',
         members: [testPlayer1, testPlayer2, testPlayer3],
+        description: 'description of the test group 1',
       );
       testGroup2 = Group(
         id: 'gr2',
         name: 'Second Group',
-        description: '',
         members: [testPlayer2, testPlayer3, testPlayer4],
+        description: 'description of the test group 2',
       );
       testGroup3 = Group(
         id: 'gr2',
         name: 'Second Group',
-        description: '',
         members: [testPlayer2, testPlayer4],
       );
       testGroup4 = Group(
         id: 'gr2',
         name: 'Second Group',
-        description: '',
         members: [testPlayer1, testPlayer2, testPlayer3, testPlayer4],
       );
     });
@@ -62,312 +60,361 @@ void main() {
     await database.close();
   });
   group('Group Tests', () {
-    // Verifies that a single group can be added and retrieved with all fields and members intact.
+    group('CREATE', () {
-    test('Adding and fetching a single group works correctly', () async {
+      test('Adding and fetching a single group works correctly', () async {
-      await database.groupDao.addGroup(group: testGroup1);
+        await database.groupDao.addGroup(group: testGroup1);
 
-      final fetchedGroup = await database.groupDao.getGroupById(
+        final fetchedGroup = await database.groupDao.getGroupById(
-        groupId: testGroup1.id,
+          groupId: testGroup1.id,
-      );
-
-      expect(fetchedGroup.id, testGroup1.id);
-      expect(fetchedGroup.name, testGroup1.name);
-      expect(fetchedGroup.createdAt, testGroup1.createdAt);
-
-      expect(fetchedGroup.members.length, testGroup1.members.length);
-      for (int i = 0; i < testGroup1.members.length; i++) {
-        expect(fetchedGroup.members[i].id, testGroup1.members[i].id);
-        expect(fetchedGroup.members[i].name, testGroup1.members[i].name);
-        expect(
-          fetchedGroup.members[i].createdAt,
-          testGroup1.members[i].createdAt,
         );
-      }
-    });
 
-    // Verifies that multiple groups can be added and retrieved with correct members.
+        expect(fetchedGroup.id, testGroup1.id);
-    test('Adding and fetching multiple groups works correctly', () async {
+        expect(fetchedGroup.name, testGroup1.name);
-      await database.groupDao.addGroupsAsList(
+        expect(fetchedGroup.createdAt, testGroup1.createdAt);
-        groups: [testGroup1, testGroup2, testGroup3, testGroup4],
-      );
 
-      final allGroups = await database.groupDao.getAllGroups();
+        expect(fetchedGroup.members.length, testGroup1.members.length);
-      expect(allGroups.length, 2);
+        for (int i = 0; i < testGroup1.members.length; i++) {
-
+          expect(fetchedGroup.members[i].id, testGroup1.members[i].id);
-      final testGroups = {testGroup1.id: testGroup1, testGroup2.id: testGroup2};
+          expect(fetchedGroup.members[i].name, testGroup1.members[i].name);
-
+          expect(
-      for (final group in allGroups) {
+            fetchedGroup.members[i].createdAt,
-        final testGroup = testGroups[group.id]!;
+            testGroup1.members[i].createdAt,
-
+          );
-        expect(group.id, testGroup.id);
-        expect(group.name, testGroup.name);
-        expect(group.createdAt, testGroup.createdAt);
-
-        expect(group.members.length, testGroup.members.length);
-        for (int i = 0; i < testGroup.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);
         }
-      }
+      });
+
+      test('Adding the same group twice does not create duplicates', () async {
+        await database.groupDao.addGroup(group: testGroup1);
+        await database.groupDao.addGroup(group: testGroup1);
+
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups.length, 1);
+
+        final fetchedGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(fetchedGroup.id, testGroup1.id);
+        expect(fetchedGroup.members.length, testGroup1.members.length);
+      });
+
+      test('addGroup() returns false when group already exists', () async {
+        final firstAdd = await database.groupDao.addGroup(group: testGroup1);
+        expect(firstAdd, true);
+
+        final secondAdd = await database.groupDao.addGroup(group: testGroup1);
+        expect(secondAdd, false);
+
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups.length, 1);
+      });
+
+      test('Adding and fetching multiple groups works correctly', () async {
+        await database.groupDao.addGroupsAsList(
+          groups: [testGroup1, testGroup2, testGroup3, testGroup4],
+        );
+
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups.length, 2);
+
+        final testGroups = {
+          testGroup1.id: testGroup1,
+          testGroup2.id: testGroup2,
+        };
+
+        for (final group in allGroups) {
+          final testGroup = testGroups[group.id]!;
+
+          expect(group.id, testGroup.id);
+          expect(group.name, testGroup.name);
+          expect(group.createdAt, testGroup.createdAt);
+
+          expect(group.members.length, testGroup.members.length);
+          for (int i = 0; i < testGroup.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);
+          }
+        }
+      });
+
+      test('addGroupsAsList() handles empty list correctly', () async {
+        await database.groupDao.addGroupsAsList(groups: []);
+
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups.length, 0);
+      });
     });
 
-    // Verifies that adding the same group twice does not create duplicates.
+    group('READ', () {
-    test('Adding the same group twice does not create duplicates', () async {
+      test('groupExists() works correctly', () async {
-      await database.groupDao.addGroup(group: testGroup1);
+        var groupExists = await database.groupDao.groupExists(
-      await database.groupDao.addGroup(group: testGroup1);
+          groupId: testGroup1.id,
+        );
+        expect(groupExists, false);
 
-      final allGroups = await database.groupDao.getAllGroups();
+        await database.groupDao.addGroup(group: testGroup1);
-      expect(allGroups.length, 1);
+
+        groupExists = await database.groupDao.groupExists(
+          groupId: testGroup1.id,
+        );
+        expect(groupExists, true);
+      });
+
+      test('getGroupCount() works correctly', () async {
+        var count = await database.groupDao.getGroupCount();
+        expect(count, 0);
+
+        var added = await database.groupDao.addGroup(group: testGroup1);
+        expect(added, true);
+        count = await database.groupDao.getGroupCount();
+        expect(count, 1);
+
+        added = await database.groupDao.addGroup(group: testGroup2);
+        expect(added, true);
+        count = await database.groupDao.getGroupCount();
+        expect(count, 2);
+
+        final removed = await database.groupDao.deleteGroup(
+          groupId: testGroup1.id,
+        );
+        expect(removed, true);
+        count = await database.groupDao.getGroupCount();
+        expect(count, 1);
+      });
+
+      test('getGroupById() throws exception for non-existent group', () async {
+        expect(
+          () => database.groupDao.getGroupById(groupId: 'non-existent-id'),
+          throwsA(isA<StateError>()),
+        );
+      });
+
+      test('getAllGroups() returns empty list when no groups exist', () async {
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups, isEmpty);
+      });
+
+      test('addGroupsAsList() with duplicate groups only adds once', () async {
+        await database.groupDao.addGroupsAsList(
+          groups: [testGroup1, testGroup1, testGroup1],
+        );
+
+        final allGroups = await database.groupDao.getAllGroups();
+        expect(allGroups.length, 1);
+      });
     });
 
-    // Verifies that groupExists returns correct boolean based on group presence.
+    group('UPDATE', () {
-    test('Group existence check works correctly', () async {
+      test('updateGroupName() works correctly', () async {
-      var groupExists = await database.groupDao.groupExists(
+        await database.groupDao.addGroup(group: testGroup1);
-        groupId: testGroup1.id,
-      );
-      expect(groupExists, false);
 
-      await database.groupDao.addGroup(group: testGroup1);
+        const newName = 'New name';
+        await database.groupDao.updateGroupName(
+          groupId: testGroup1.id,
+          newName: newName,
+        );
 
-      groupExists = await database.groupDao.groupExists(groupId: testGroup1.id);
+        final result = await database.groupDao.getGroupById(
-      expect(groupExists, true);
+          groupId: testGroup1.id,
-    });
+        );
+        expect(result.name, newName);
+      });
 
-    // Verifies that deleteGroup removes the group and returns true.
+      test('updateGroupName() returns false for non-existent group', () async {
-    test('Deleting a group works correctly', () async {
+        final updated = await database.groupDao.updateGroupName(
-      await database.groupDao.addGroup(group: testGroup1);
-
-      final groupDeleted = await database.groupDao.deleteGroup(
-        groupId: testGroup1.id,
-      );
-      expect(groupDeleted, true);
-
-      final groupExists = await database.groupDao.groupExists(
-        groupId: testGroup1.id,
-      );
-      expect(groupExists, false);
-    });
-
-    // Verifies that updateGroupName correctly updates only the name field.
-    test('Updating a group name works correctly', () async {
-      await database.groupDao.addGroup(group: testGroup1);
-
-      const newGroupName = 'new group name';
-
-      await database.groupDao.updateGroupName(
-        groupId: testGroup1.id,
-        newName: newGroupName,
-      );
-
-      final result = await database.groupDao.getGroupById(
-        groupId: testGroup1.id,
-      );
-      expect(result.name, newGroupName);
-    });
-
-    // Verifies that getGroupCount returns correct count through add/delete operations.
-    test('Getting the group count works correctly', () async {
-      final initialCount = await database.groupDao.getGroupCount();
-      expect(initialCount, 0);
-
-      await database.groupDao.addGroup(group: testGroup1);
-
-      final groupAdded = await database.groupDao.getGroupCount();
-      expect(groupAdded, 1);
-
-      final groupRemoved = await database.groupDao.deleteGroup(
-        groupId: testGroup1.id,
-      );
-      expect(groupRemoved, true);
-
-      final finalCount = await database.groupDao.getGroupCount();
-      expect(finalCount, 0);
-    });
-
-    // Verifies that getAllGroups returns an empty list when no groups exist.
-    test('getAllGroups returns empty list when no groups exist', () async {
-      final allGroups = await database.groupDao.getAllGroups();
-      expect(allGroups, isEmpty);
-    });
-
-    // Verifies that getGroupById throws StateError for non-existent group ID.
-    test('getGroupById throws exception for non-existent group', () async {
-      expect(
-        () => database.groupDao.getGroupById(groupId: 'non-existent-id'),
-        throwsA(isA<StateError>()),
-      );
-    });
-
-    // Verifies that addGroup returns false when trying to add a duplicate group.
-    test('addGroup returns false when group already exists', () async {
-      final firstAdd = await database.groupDao.addGroup(group: testGroup1);
-      expect(firstAdd, true);
-
-      final secondAdd = await database.groupDao.addGroup(group: testGroup1);
-      expect(secondAdd, false);
-
-      final allGroups = await database.groupDao.getAllGroups();
-      expect(allGroups.length, 1);
-    });
-
-    // Verifies that addGroupsAsList handles an empty list without errors.
-    test('addGroupsAsList handles empty list correctly', () async {
-      await database.groupDao.addGroupsAsList(groups: []);
-
-      final allGroups = await database.groupDao.getAllGroups();
-      expect(allGroups.length, 0);
-    });
-
-    // Verifies that deleteGroup returns false for a non-existent group ID.
-    test('deleteGroup returns false for non-existent group', () async {
-      final deleted = await database.groupDao.deleteGroup(
-        groupId: 'non-existent-id',
-      );
-      expect(deleted, false);
-    });
-
-    // Verifies that updateGroupName returns false for a non-existent group ID.
-    test('updateGroupName returns false for non-existent group', () async {
-      final updated = await database.groupDao.updateGroupName(
-        groupId: 'non-existent-id',
-        newName: 'New Name',
-      );
-      expect(updated, false);
-    });
-
-    // Verifies that updateGroupDescription correctly updates the description field.
-    test('Updating a group description works correctly', () async {
-      await database.groupDao.addGroup(group: testGroup1);
-
-      const newDescription = 'This is a new description';
-
-      final updated = await database.groupDao.updateGroupDescription(
-        groupId: testGroup1.id,
-        newDescription: newDescription,
-      );
-      expect(updated, true);
-
-      final result = await database.groupDao.getGroupById(
-        groupId: testGroup1.id,
-      );
-      expect(result.description, newDescription);
-    });
-
-    // Verifies that updateGroupDescription can set the description to null.
-    test('updateGroupDescription can set description to null', () async {
-      final groupWithDescription = Group(
-        name: 'Group with description',
-        description: 'Initial description',
-        members: [testPlayer1],
-      );
-      await database.groupDao.addGroup(group: groupWithDescription);
-
-      final updated = await database.groupDao.updateGroupDescription(
-        groupId: groupWithDescription.id,
-        newDescription: 'Updated description',
-      );
-      expect(updated, true);
-
-      final result = await database.groupDao.getGroupById(
-        groupId: groupWithDescription.id,
-      );
-      expect(result.description, 'Updated description');
-    });
-
-    // Verifies that updateGroupDescription returns false for a non-existent group.
-    test(
-      'updateGroupDescription returns false for non-existent group',
-      () async {
-        final updated = await database.groupDao.updateGroupDescription(
           groupId: 'non-existent-id',
-          newDescription: 'New Description',
+          newName: 'New name',
         );
         expect(updated, false);
-      },
+      });
-    );
 
-    // Verifies that deleteAllGroups removes all groups from the database.
+      test('updateGroupDescription() works correctly', () async {
-    test('deleteAllGroups removes all groups', () async {
+        await database.groupDao.addGroup(group: testGroup1);
-      await database.groupDao.addGroupsAsList(groups: [testGroup1, testGroup2]);
 
-      final countBefore = await database.groupDao.getGroupCount();
+        const newDescription = 'New description';
-      expect(countBefore, 2);
+        final updated = await database.groupDao.updateGroupDescription(
+          groupId: testGroup1.id,
+          newDescription: newDescription,
+        );
+        expect(updated, true);
 
-      final deleted = await database.groupDao.deleteAllGroups();
+        final group = await database.groupDao.getGroupById(
-      expect(deleted, true);
+          groupId: testGroup1.id,
+        );
+        expect(group.description, newDescription);
+      });
 
-      final countAfter = await database.groupDao.getGroupCount();
+      test(
-      expect(countAfter, 0);
+        'updateGroupDescription() returns false for non-existent group',
+        () async {
+          final updated = await database.groupDao.updateGroupDescription(
+            groupId: 'non-existent-id',
+            newDescription: 'New description',
+          );
+          expect(updated, false);
+        },
+      );
+
+      test('Multiple updates to the same group work correctly', () async {
+        await database.groupDao.addGroup(group: testGroup1);
+        const newName = 'New name';
+        const newDescription = 'New description';
+
+        await database.groupDao.updateGroupName(
+          groupId: testGroup1.id,
+          newName: newName,
+        );
+        await database.groupDao.updateGroupDescription(
+          groupId: testGroup1.id,
+          newDescription: newDescription,
+        );
+
+        final updatedGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(updatedGroup.name, newName);
+        expect(updatedGroup.description, newDescription);
+      });
+
+      test('replaceGroupPlayers() works correctly', () async {
+        await database.groupDao.addGroup(group: testGroup1);
+
+        final initialGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(initialGroup.members.length, 3);
+        expect(
+          initialGroup.members
+              .map((p) => p.id)
+              .toList()
+              .contains(testPlayer1.id),
+          true,
+        );
+        expect(
+          initialGroup.members
+              .map((p) => p.id)
+              .toList()
+              .contains(testPlayer2.id),
+          true,
+        );
+        expect(
+          initialGroup.members
+              .map((p) => p.id)
+              .toList()
+              .contains(testPlayer3.id),
+          true,
+        );
+
+        final newPlayers = [testPlayer2, testPlayer4];
+        final replaced = await database.groupDao.replaceGroupPlayers(
+          groupId: testGroup1.id,
+          newPlayers: newPlayers,
+        );
+        expect(replaced, true);
+
+        final updatedGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(updatedGroup.members.length, 2);
+
+        final memberIds = updatedGroup.members.map((p) => p.id).toList();
+        expect(memberIds.contains(testPlayer2.id), true);
+        expect(memberIds.contains(testPlayer4.id), true);
+        expect(memberIds.contains(testPlayer1.id), false);
+        expect(memberIds.contains(testPlayer3.id), false);
+      });
+
+      test('replaceGroupPlayers() with empty list works correctly', () async {
+        await database.groupDao.addGroup(group: testGroup1);
+
+        final initialGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(initialGroup.members.length, 3);
+
+        final replaced = await database.groupDao.replaceGroupPlayers(
+          groupId: testGroup1.id,
+          newPlayers: [],
+        );
+        expect(replaced, true);
+
+        final updatedGroup = await database.groupDao.getGroupById(
+          groupId: testGroup1.id,
+        );
+        expect(updatedGroup.members.length, 0);
+        expect(updatedGroup.members, isEmpty);
+      });
+
+      test(
+        'replaceGroupPlayers() returns false for non-existent group',
+        () async {
+          final replaced = await database.groupDao.replaceGroupPlayers(
+            groupId: 'non-existent-id',
+            newPlayers: [testPlayer1],
+          );
+          expect(replaced, false);
+        },
+      );
     });
 
-    // Verifies that deleteAllGroups returns false when no groups exist.
+    group('DELETE', () {
-    test('deleteAllGroups returns false when no groups exist', () async {
+      test('deleteGroup() works correctly', () async {
-      final deleted = await database.groupDao.deleteAllGroups();
+        await database.groupDao.addGroup(group: testGroup1);
-      expect(deleted, false);
+
+        final groupDeleted = await database.groupDao.deleteGroup(
+          groupId: testGroup1.id,
+        );
+        expect(groupDeleted, true);
+
+        final groupExists = await database.groupDao.groupExists(
+          groupId: testGroup1.id,
+        );
+        expect(groupExists, false);
+      });
+
+      test('deleteGroup() returns false for non-existent group', () async {
+        final deleted = await database.groupDao.deleteGroup(
+          groupId: 'non-existent-id',
+        );
+        expect(deleted, false);
+      });
+
+      test('deleteAllGroups() works correctly', () async {
+        await database.groupDao.addGroupsAsList(
+          groups: [testGroup1, testGroup2],
+        );
+
+        var count = await database.groupDao.getGroupCount();
+        expect(count, 2);
+
+        final deleted = await database.groupDao.deleteAllGroups();
+        expect(deleted, true);
+
+        count = await database.groupDao.getGroupCount();
+        expect(count, 0);
+      });
+
+      test('deleteAllGroups() returns false when no groups exist', () async {
+        final deleted = await database.groupDao.deleteAllGroups();
+        expect(deleted, false);
+      });
     });
 
-    // Verifies that groups with special characters (quotes, emojis) are stored correctly.
+    group('Edge Cases', () {
-    test('Group with special characters in name is stored correctly', () async {
+      test('Group with special characters is stored correctly', () async {
-      final specialGroup = Group(
+        final specialGroup = Group(
-        name: 'Group\'s & "Special" <Name>',
+          name: 'Group\'s & "Special" <Name>',
-        description: 'Description with émojis 🎮🎲',
+          description: 'Description with émojis 🎮🎲',
-        members: [testPlayer1],
+          members: [testPlayer1],
-      );
+        );
-      await database.groupDao.addGroup(group: specialGroup);
+        await database.groupDao.addGroup(group: specialGroup);
 
-      final fetchedGroup = await database.groupDao.getGroupById(
+        final fetchedGroup = await database.groupDao.getGroupById(
-        groupId: specialGroup.id,
+          groupId: specialGroup.id,
-      );
+        );
-      expect(fetchedGroup.name, 'Group\'s & "Special" <Name>');
+        expect(fetchedGroup.name, 'Group\'s & "Special" <Name>');
-      expect(fetchedGroup.description, 'Description with émojis 🎮🎲');
+        expect(fetchedGroup.description, 'Description with émojis 🎮🎲');
-    });
+      });
-
-    // Verifies that a group with an empty members list can be stored and retrieved.
-    test('Group with empty members list is stored correctly', () async {
-      final emptyGroup = Group(
-        name: 'Empty Group',
-        description: '',
-        members: [],
-      );
-      await database.groupDao.addGroup(group: emptyGroup);
-
-      final fetchedGroup = await database.groupDao.getGroupById(
-        groupId: emptyGroup.id,
-      );
-      expect(fetchedGroup.name, 'Empty Group');
-      expect(fetchedGroup.members, isEmpty);
-    });
-
-    // Verifies that multiple sequential updates to the same group work correctly.
-    test('Multiple updates to the same group work correctly', () async {
-      await database.groupDao.addGroup(group: testGroup1);
-
-      await database.groupDao.updateGroupName(
-        groupId: testGroup1.id,
-        newName: 'Updated Name',
-      );
-      await database.groupDao.updateGroupDescription(
-        groupId: testGroup1.id,
-        newDescription: 'Updated Description',
-      );
-
-      final updatedGroup = await database.groupDao.getGroupById(
-        groupId: testGroup1.id,
-      );
-      expect(updatedGroup.name, 'Updated Name');
-      expect(updatedGroup.description, 'Updated Description');
-      expect(updatedGroup.members.length, testGroup1.members.length);
-    });
-
-    // Verifies that addGroupsAsList with duplicate groups only adds unique ones.
-    test('addGroupsAsList with duplicate groups only adds once', () async {
-      await database.groupDao.addGroupsAsList(
-        groups: [testGroup1, testGroup1, testGroup1],
-      );
-
-      final allGroups = await database.groupDao.getAllGroups();
-      expect(allGroups.length, 1);
     });
   });
 }