public void report_battles()
        {
            var dataAccess = new DataAccess();

            dataAccess.AddBattles(A.Battle1, A.Battle2);

            // Only brutal battles
            {
                string[] result = new DataAccess().ReportBattles(
                    new DateTime(1700, 1, 1),
                    new DateTime(1900, 1, 1),
                    true);

                CollectionAssert.AreEqual(new[] {
                    "Battle 1 was a brutal battle within the period",
                }, result);
            }

            // Only friendly battles
            {
                string[] result = new DataAccess().ReportBattles(
                    new DateTime(1700, 1, 1),
                    new DateTime(1900, 1, 1),
                    false);

                CollectionAssert.AreEqual(new[] {
                    "Battle 2 was a friendly battle within the period"
                }, result);
            }

            // Both (note that third parameter is "null")
            {
                string[] result = new DataAccess().ReportBattles(
                    new DateTime(1700, 1, 1),
                    new DateTime(1900, 1, 1),
                    null);

                CollectionAssert.AreEqual(new[] {
                    "Battle 1 was a brutal battle within the period",
                    "Battle 2 was a friendly battle within the period"
                }, result);
            }

            // Filtering by date
            {
                string[] result = new DataAccess().ReportBattles(
                    new DateTime(1800, 1, 1),
                    new DateTime(1900, 1, 1),
                    null);

                CollectionAssert.AreEqual(new[] {
                    "Battle 2 was a friendly battle within the period"
                }, result);
            }
        }