public async Task DeleteAchievementAsync()
{
//Arrange
var achievement = AchievementDumbData.GetRandomEntity();
var cancellationToken = new CancellationToken();
_achievementRepository.Setup(x => x.Delete(It.IsAny <Achievement>()));
_unitOfWork.Setup(x => x.SaveChangesAsync(cancellationToken)).Returns(Task.CompletedTask);
// Act
await _achievementService.DeleteAchievementAsync(achievement.Id, cancellationToken);
// Assert
_achievementRepository.Verify(x => x.Delete(It.IsAny <Achievement>()), Times.Once);
_unitOfWork.Verify(x => x.SaveChangesAsync(cancellationToken), Times.Once);
}