def test_pixel_checksum_doesnt_match_different_files(self):
tif_checksum = validation.generate_pixel_checksum(
filepaths.STANDARD_TIF)
assert not tif_checksum == validation.generate_pixel_checksum(
filepaths.TIF_FROM_STANDARD_JPG)
assert not validation.generate_pixel_checksum(filepaths.SMALL_TIF) == \
validation.generate_pixel_checksum(filepaths.SMALL_TIF_WITH_CHANGED_PIXELS)
def test_pixel_checksum_matches_visually_identical_files(self):
tif_checksum = validation.generate_pixel_checksum(
filepaths.STANDARD_TIF)
assert tif_checksum == validation.generate_pixel_checksum(
filepaths.STANDARD_TIF)
assert tif_checksum == validation.generate_pixel_checksum(
filepaths.LOSSLESS_JP2_FROM_STANDARD_TIF_XMP)
assert validation.generate_pixel_checksum(filepaths.SMALL_TIF) == \
validation.generate_pixel_checksum(filepaths.SMALL_TIF_WITH_CHANGED_METADATA)
def test_pixel_checksum_stays_constant(self):
SMALL_TIF_CHECKSUM = "a7cef053fa4b9ec518e44d465050b9f564adf4f6597d027c97acfaca6647262a"
assert validation.generate_pixel_checksum(
filepaths.SMALL_TIF) == SMALL_TIF_CHECKSUM
with Image.open(filepaths.SMALL_TIF) as pil_image:
assert validation.generate_pixel_checksum_from_pil_image(
pil_image) == SMALL_TIF_CHECKSUM