public void AddRegion_GivenANewRegion_AddsToDatabase()
{
// arrange
Region region = new Region()
{
ID = 101
};
Mock <IRegionRepository> mockRepo = new Mock <IRegionRepository>();
LocationService sut = new LocationService(mockRepo.Object, null, null, null);
// act
sut.AddRegion(region);
// assert
mockRepo.Verify(r => r.AddRegion(It.Is <Region>(a => a.Equals(region))), Times.Once());
}