public async Task GetRegions_ReturnsRegions()
        {
            // Arrange
            _regionService.Setup(x => x.GetRegions()).ReturnsAsync(GetAdminRegions());
            // Act
            var result = await _regionController.GetRegions();

            var actual = (result as ObjectResult).Value;

            // Assert
            _regionService.Verify();
            Assert.IsInstanceOf <OkObjectResult>(result);
            Assert.NotNull(result);
            Assert.IsInstanceOf <IEnumerable <RegionForAdministrationDTO> >(actual);
        }