public async void RemoveAllExpiredElectionUnitTest()
{
// Arrange
var mockRepo = GetElectionRepositoryMock();
var service = new ElectionService(mockRepo.Object);
// Act
await service.RemoveAllExpiredElectionsAsync();
// Assert
mockRepo.Verify(repo => repo.RemoveAsync(It.IsAny <Election>()), Times.AtMostOnce);
}