public void RemoveAllParticipants_ReturnsNoParticipants() { // Arrange var drawService = new DrawService(); drawService.AddParticipant("participant_one"); drawService.AddParticipant("participant_two"); drawService.AddParticipant("participant_three"); // Act drawService.RemoveAllParticipants(); // Assert Assert.Equal(0, drawService.GetParticipants().Count); }