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"""Tests of updating a dataset's tags etc."""
import affine
import numpy as np
import pytest
import rasterio
def test_update_tags(data):
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.update_tags(a='1', b='2')
f.update_tags(1, c=3)
with pytest.raises(IndexError):
f.update_tags(4, d=4)
assert f.tags() == {'AREA_OR_POINT': 'Area', 'a': '1', 'b': '2'}
assert ('c', '3') in f.tags(1).items()
def test_update_band(data):
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.write(np.zeros(f.shape, dtype=f.dtypes[0]), indexes=1)
with rasterio.open(tiffname) as f:
assert not f.read(1).any()
def test_update_spatial(data):
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.transform = affine.Affine(1.0, 0.0, 1.0,
0.0, -1.0, 0.0)
f.crs = {'init': 'epsg:4326'}
with rasterio.open(tiffname) as f:
assert f.transform == affine.Affine(1.0, 0.0, 1.0,
0.0, -1.0, 0.0)
assert f.transform.to_gdal() == (1.0, 1.0, 0.0, 0.0, 0.0, -1.0)
assert f.crs == {'init': 'epsg:4326'}
def test_update_spatial_epsg(data):
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.transform = affine.Affine(1.0, 0.0, 1.0,
0.0, -1.0, 0.0)
f.crs = 'EPSG:4326'
with rasterio.open(tiffname) as f:
assert f.transform == affine.Affine(1.0, 0.0, 1.0,
0.0, -1.0, 0.0)
assert f.transform.to_gdal() == (1.0, 1.0, 0.0, 0.0, 0.0, -1.0)
assert f.crs == {'init': 'epsg:4326'}
def test_update_nodata(data):
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.nodata = 255
with rasterio.open(tiffname) as f:
assert f.nodatavals == (255, 255, 255)
def test_update_nodatavals_none(data):
"""GDAL 2.1 does support un-setting nodata values."""
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.nodata = None
with rasterio.open(tiffname) as f:
assert f.nodatavals == (None, None, None)
def test_update_mask_true(data):
"""Provide an option to set a uniformly valid mask."""
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.write_mask(True)
with rasterio.open(tiffname) as f:
assert f.read_masks().all()
def test_update_mask_false(data):
"""Provide an option to set a uniformly invalid mask."""
tiffname = str(data.join('RGB.byte.tif'))
with rasterio.open(tiffname, 'r+') as f:
f.write_mask(False)
with rasterio.open(tiffname) as f:
assert not f.read_masks().any()
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