public async void GetById_WhenNonExistent_ShouldReturnNull()
{
//arrange
_context.Database.EnsureCreated();
var differenceLeftRepository = new DifferenceLeftRepository(_context);
int id = 1;
//Act
var differenceReturned = await differenceLeftRepository.GetById(id);
//Assert
Assert.Null(differenceReturned);
}
public async void GetById_WhenProperlySaved_ShouldReturnEqualValues()
{
//arrange
_context.Database.EnsureCreated();
var differenceLeftRepository = new DifferenceLeftRepository(_context);
int id = 1;
//Act
var differenceSaved = new DifferenceLeft(id, "a");
differenceLeftRepository.Add(differenceSaved);
var differenceReturned = await differenceLeftRepository.GetById(id);
//Assert
Assert.Equal <Difference>(differenceSaved, differenceReturned);
}