public void GetAverageTextLengthByGender_ShouldReturnZero_WhenNoEntitiesToAverage()
{
var configuration = new MapperConfiguration(cfg => { cfg.AddProfile <PerPeriodProfile>(); });
var mapper = new Mapper(configuration);
var mapperHelper = new EntityMapper(mapper);
var entities = new List <MessageByGenderEntity>();
var total = mapperHelper.GetAverageTextLengthByGender(entities, "M");
Assert.Equal(0, total);
}