Skip `LayerMapRouterTest` if there are not multiple databases.

from __future__ import absolute_import

import os

import unittest

from copy import copy

from decimal import Decimal

from django.contrib.gis.utils.layermapping import (LayerMapping, LayerMapError,

    InvalidDecimal, MissingForeignKey)

from django.db import router

from django.conf import settings

from django.test import TestCase

from .models import (

    def tearDown(self):

        router.routers = self.old_routers

    @unittest.skipUnless(len(settings.DATABASES) > 1, 'multiple databases required')

    def test_layermapping_default_db(self):

        lm = LayerMapping(City, city_shp, city_mapping)

        self.assertEqual(lm.using, 'other')