public void GetRegionsNullTest()
{
List <Region> regions = new List <Region>();
var mockRegion = new Mock <IRepository <Region> >(MockBehavior.Strict);
mockRegion.Setup(p => p.GetAll()).Returns(regions);
var logic = new RegionLogic(mockRegion.Object);
var result = logic.GetRegions();
mockRegion.VerifyAll();
Assert.IsTrue(result.SequenceEqual(regions));
}