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from unittest import mock, TestCase
from osgeo import gdal, osr
import gdal2tiles
class AttrDict(dict):
def __init__(self, *args, **kwargs):
super(AttrDict, self).__init__(*args, **kwargs)
self.__dict__ = self
class ReprojectDatasetTest(TestCase):
def setUp(self):
self.DEFAULT_OPTIONS = {
'verbose': True,
'resampling': 'near',
'title': '',
'url': '',
}
self.DEFAULT_ATTRDICT_OPTIONS = AttrDict(self.DEFAULT_OPTIONS)
self.mercator_srs = osr.SpatialReference()
self.mercator_srs.ImportFromEPSG(3857)
self.geodetic_srs = osr.SpatialReference()
self.geodetic_srs.ImportFromEPSG(4326)
def test_raises_if_no_from_or_to_srs(self):
with self.assertRaises(gdal2tiles.GDALError):
gdal2tiles.reproject_dataset(None, None, self.mercator_srs)
with self.assertRaises(gdal2tiles.GDALError):
gdal2tiles.reproject_dataset(None, self.mercator_srs, None)
def test_returns_dataset_unchanged_if_in_destination_srs_and_no_gcps(self):
from_ds = mock.MagicMock()
from_ds.GetGCPCount = mock.MagicMock(return_value=0)
to_ds = gdal2tiles.reproject_dataset(from_ds, self.mercator_srs, self.mercator_srs)
self.assertEqual(from_ds, to_ds)
@mock.patch('gdal2tiles.gdal', spec=gdal)
def test_returns_warped_vrt_dataset_when_from_srs_different_from_to_srs(self, mock_gdal):
mock_gdal.AutoCreateWarpedVRT = mock.MagicMock(spec=gdal.Dataset)
from_ds = mock.MagicMock(spec=gdal.Dataset)
from_ds.GetGCPCount = mock.MagicMock(return_value=0)
gdal2tiles.reproject_dataset(from_ds, self.mercator_srs, self.geodetic_srs)
mock_gdal.AutoCreateWarpedVRT.assert_called_with(from_ds,
self.mercator_srs.ExportToWkt(),
self.geodetic_srs.ExportToWkt())
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