public void DetailsController_SubRegionDetails_IsNotNull()
{
// Arrange
var regionInfo = new RegionDetails()
{
Name = "TestSubRegion"
};
_mediator.Setup(s => s.GetSubRegionDetails("TestSubRegion")).ReturnsAsync(regionInfo);
var controller = new DetailsController(_mediator.Object);
// Act
var result = controller.SubRegionDetails("TestSubRegion").Result;
// Assert
result.Should().NotBeNull();
}