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#
# openslide-python - Python bindings for the OpenSlide library
#
# Copyright (c) 2016-2024 Benjamin Gilbert
#
# This library is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License
# as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import annotations
import sys
import unittest
from PIL import Image
from common import file_path
from openslide import ImageSlide, OpenSlideCache, OpenSlideError, lowlevel
class TestImageWithoutOpening(unittest.TestCase):
def test_detect_format(self) -> None:
self.assertTrue(ImageSlide.detect_format(file_path('__missing_file')) is None)
self.assertTrue(ImageSlide.detect_format(file_path('../setup.py')) is None)
self.assertEqual(ImageSlide.detect_format(file_path('boxes.png')), 'PNG')
def test_open(self) -> None:
self.assertRaises(OSError, lambda: ImageSlide(file_path('__does_not_exist')))
self.assertRaises(OSError, lambda: ImageSlide(file_path('../setup.py')))
def test_open_image(self) -> None:
# passing PIL.Image to ImageSlide
with Image.open(file_path('boxes.png')) as img:
with ImageSlide(img) as osr:
self.assertEqual(osr.dimensions, (300, 250))
self.assertEqual(repr(osr), 'ImageSlide(%r)' % img)
@unittest.skipUnless(
sys.getfilesystemencoding() == 'utf-8',
'Python filesystem encoding is not UTF-8',
)
def test_unicode_path(self) -> None:
path = file_path('😐.png')
for arg in path, str(path):
self.assertEqual(ImageSlide.detect_format(arg), 'PNG')
self.assertEqual(ImageSlide(arg).dimensions, (300, 250))
def test_unicode_path_bytes(self) -> None:
arg = str(file_path('😐.png')).encode('UTF-8')
self.assertEqual(ImageSlide.detect_format(arg), 'PNG')
self.assertEqual(ImageSlide(arg).dimensions, (300, 250))
def test_operations_on_closed_handle(self) -> None:
with Image.open(file_path('boxes.png')) as img:
osr = ImageSlide(img)
osr.close()
self.assertRaises(
ValueError, lambda: osr.read_region((0, 0), 0, (100, 100))
)
self.assertRaises(ValueError, lambda: osr.level_dimensions)
# If an Image is passed to the constructor, ImageSlide.close()
# shouldn't close it
self.assertEqual(img.getpixel((0, 0)), 3)
def test_context_manager(self) -> None:
osr = ImageSlide(file_path('boxes.png'))
with osr:
pass
self.assertRaises(ValueError, lambda: osr.read_region((0, 0), 0, (100, 100)))
self.assertRaises(ValueError, lambda: osr.level_dimensions)
class _Abstract:
# nested class to prevent the test runner from finding it
class SlideTest(unittest.TestCase):
FILENAME: str | None = None
def setUp(self) -> None:
assert self.FILENAME is not None
self.osr = ImageSlide(file_path(self.FILENAME))
def tearDown(self) -> None:
self.osr.close()
class TestImage(_Abstract.SlideTest):
FILENAME = 'boxes.png'
def test_repr(self) -> None:
self.assertEqual(repr(self.osr), 'ImageSlide(%r)' % file_path('boxes.png'))
def test_metadata(self) -> None:
self.assertEqual(self.osr.level_count, 1)
self.assertEqual(self.osr.level_dimensions, ((300, 250),))
self.assertEqual(self.osr.dimensions, (300, 250))
self.assertEqual(self.osr.level_downsamples, (1.0,))
self.assertEqual(self.osr.get_best_level_for_downsample(0.5), 0)
self.assertEqual(self.osr.get_best_level_for_downsample(3), 0)
self.assertEqual(self.osr.properties, {})
self.assertEqual(self.osr.associated_images, {})
def test_color_profile(self) -> None:
assert self.osr.color_profile is not None # for type inference
self.assertEqual(self.osr.color_profile.profile.device_class, 'mntr')
self.assertEqual(
len(self.osr.read_region((0, 0), 0, (100, 100)).info['icc_profile']), 588
)
self.assertEqual(
len(self.osr.get_thumbnail((100, 100)).info['icc_profile']), 588
)
def test_read_region(self) -> None:
self.assertEqual(
self.osr.read_region((-10, -10), 0, (400, 400)).size, (400, 400)
)
def test_read_region_size_dimension_zero(self) -> None:
self.assertEqual(self.osr.read_region((0, 0), 0, (400, 0)).size, (400, 0))
def test_read_region_bad_level(self) -> None:
self.assertRaises(
OpenSlideError, lambda: self.osr.read_region((0, 0), 1, (100, 100))
)
def test_read_region_bad_size(self) -> None:
self.assertRaises(
OpenSlideError, lambda: self.osr.read_region((0, 0), 0, (400, -5))
)
def test_thumbnail(self) -> None:
self.assertEqual(self.osr.get_thumbnail((100, 100)).size, (100, 83))
@unittest.skipUnless(lowlevel.cache_create.available, "requires OpenSlide 4.0.0")
def test_set_cache(self) -> None:
self.osr.set_cache(OpenSlideCache(64 << 10))
self.assertEqual(self.osr.read_region((0, 0), 0, (400, 400)).size, (400, 400))
class TestNoIccImage(_Abstract.SlideTest):
FILENAME = 'boxes-no-icc.png'
def test_color_profile(self) -> None:
self.assertIsNone(self.osr.color_profile)
self.assertNotIn(
'icc_profile', self.osr.read_region((0, 0), 0, (100, 100)).info
)
self.assertNotIn('icc_profile', self.osr.get_thumbnail((100, 100)).info)
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