public void Given_ValidId_GetById_Should_Return_Dto()
{
//Arrange
var validId = 1;
var fakes = new List <Rates>()
{
new Rates {
RateId = validId
}
}
var mock = new Mock <IDbContext>();
//Assuming IDbContext.Rates.GetAll() returns an IEnumerable<Rates>
mock.Setup(m => m.Rates.GetAll()).Returns(fakes);
var sut = new RateService(mock.Object);
//Act
var result = sut.GetById(validId);
//Assert
Assert.IsNotNull(result);
}