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from unittest import mock, TestCase
import gdal2tiles
class AttrDict(dict):
def __init__(self, *args, **kwargs):
super(AttrDict, self).__init__(*args, **kwargs)
self.__dict__ = self
class SetupNoDataValueTest(TestCase):
def setUp(self):
self.DEFAULT_OPTIONS = {
'srcnodata': None,
'verbose': True,
}
self.DEFAULT_ATTRDICT_OPTIONS = AttrDict(self.DEFAULT_OPTIONS)
self.nodata_in_input = [1, 2, 3, 4]
self.RASTER_COUNT = 4
self.mock_dataset = mock.MagicMock()
self.mock_dataset.RasterCount = self.RASTER_COUNT
self.mock_dataset.GetRasterBand().GetNoDataValue = mock.MagicMock(
side_effect=self.nodata_in_input)
def test_reads_values_from_input_dataset(self):
nodata = gdal2tiles.setup_no_data_values(self.mock_dataset, self.DEFAULT_ATTRDICT_OPTIONS)
self.assertEqual(nodata, self.nodata_in_input)
def test_uses_the_passed_arguments_in_priority(self):
arg_nodata = "0,2,4,8"
self.DEFAULT_ATTRDICT_OPTIONS['srcnodata'] = arg_nodata
nodata = gdal2tiles.setup_no_data_values(self.mock_dataset, self.DEFAULT_ATTRDICT_OPTIONS)
self.assertEqual(nodata, [float(x) for x in arg_nodata.split(',')])
def test_extends_passed_arguments_if_not_enough_values_given(self):
def test_with_args(arg_nodata):
self.DEFAULT_ATTRDICT_OPTIONS['srcnodata'] = arg_nodata
nodata = gdal2tiles.setup_no_data_values(
self.mock_dataset, self.DEFAULT_ATTRDICT_OPTIONS)
extended_args = ",".join([arg_nodata] * self.RASTER_COUNT)
self.assertEqual(
nodata,
[float(x) for x in extended_args.split(',')][:self.RASTER_COUNT]
)
test_with_args("0,2,4")
test_with_args("0,2")
test_with_args("0")
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