Allowed RasterFieldWithoutGDALTest to run even if GDAL is installed.

import json

from unittest import skipIf

from django.contrib.gis.gdal import HAS_GDAL

from django.contrib.gis.shortcuts import numpy

from django.core.exceptions import ImproperlyConfigured

from django.test import TestCase, TransactionTestCase, skipUnlessDBFeature

from django.test import (

    TestCase, TransactionTestCase, mock, skipUnlessDBFeature,

)

from ..data.rasters.textrasters import JSON_RASTER

from ..models import models

        )

@skipIf(HAS_GDAL, 'Test raster field exception on systems without GDAL.')

@mock.patch('django.contrib.gis.db.models.fields.HAS_GDAL', False)

class RasterFieldWithoutGDALTest(TestCase):

    def test_raster_field_without_gdal_exception(self):