public async Task DeleteAsync_ShouldReturnNotFoundResponseGivenTheIdDoesNotMatchAnAdvertisement()
{
var nonExistentId = new Fixture().Create <int>();
_advertisementService.Setup(x => x.ExistsAsync(nonExistentId)).ReturnsAsync(false);
var result = await _controller.DeleteAsync(nonExistentId);
result.Should().BeOfType <NotFoundResult>();
}