public async Task GetAllRegionsAsync_ReturnsIEnumerableRegionDTO()
{
// Arrange
_repoWrapper
.Setup(x => x.Region.GetAllAsync(It.IsAny <Expression <Func <Region, bool> > >(),
It.IsAny <Func <IQueryable <Region>, IIncludableQueryable <Region, object> > >()))
.ReturnsAsync(new List <Region>());
_mapper.Setup(x => x.Map <IEnumerable <Region>, IEnumerable <RegionDTO> >(It.IsAny <IEnumerable <Region> >()))
.Returns(regions);
// Act
var result = await _regionService.GetAllRegionsAsync();
// Assert
Assert.IsInstanceOf <IEnumerable <RegionDTO> >(result);
Assert.IsNotNull(result);
}