Pillow/Tests/test_file_jpeg2k.py
Jon Dufresne 4de5477b61 Remove unnecessary unittest.main() boilerplate from test files
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:

    if __name__ == '__main__':
        unittest.main()

To every test file. It is simply noise.

The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
2019-02-03 10:10:16 -08:00

213 lines
6.6 KiB
Python

from .helper import PillowTestCase
from PIL import Image, Jpeg2KImagePlugin
from io import BytesIO
codecs = dir(Image.core)
test_card = Image.open('Tests/images/test-card.png')
test_card.load()
# OpenJPEG 2.0.0 outputs this debugging message sometimes; we should
# ignore it---it doesn't represent a test failure.
# 'Not enough memory to handle tile data'
class TestFileJpeg2k(PillowTestCase):
def setUp(self):
if "jpeg2k_encoder" not in codecs or "jpeg2k_decoder" not in codecs:
self.skipTest('JPEG 2000 support not available')
def roundtrip(self, im, **options):
out = BytesIO()
im.save(out, "JPEG2000", **options)
test_bytes = out.tell()
out.seek(0)
im = Image.open(out)
im.bytes = test_bytes # for testing only
im.load()
return im
def test_sanity(self):
# Internal version number
self.assertRegex(Image.core.jp2klib_version, r'\d+\.\d+\.\d+$')
im = Image.open('Tests/images/test-card-lossless.jp2')
px = im.load()
self.assertEqual(px[0, 0], (0, 0, 0))
self.assertEqual(im.mode, 'RGB')
self.assertEqual(im.size, (640, 480))
self.assertEqual(im.format, 'JPEG2000')
self.assertEqual(im.get_format_mimetype(), 'image/jp2')
def test_jpf(self):
im = Image.open('Tests/images/balloon.jpf')
self.assertEqual(im.format, 'JPEG2000')
self.assertEqual(im.get_format_mimetype(), 'image/jpx')
def test_invalid_file(self):
invalid_file = "Tests/images/flower.jpg"
self.assertRaises(SyntaxError,
Jpeg2KImagePlugin.Jpeg2KImageFile, invalid_file)
def test_bytesio(self):
with open('Tests/images/test-card-lossless.jp2', 'rb') as f:
data = BytesIO(f.read())
im = Image.open(data)
im.load()
self.assert_image_similar(im, test_card, 1.0e-3)
# These two test pre-written JPEG 2000 files that were not written with
# PIL (they were made using Adobe Photoshop)
def test_lossless(self):
im = Image.open('Tests/images/test-card-lossless.jp2')
im.load()
outfile = self.tempfile('temp_test-card.png')
im.save(outfile)
self.assert_image_similar(im, test_card, 1.0e-3)
def test_lossy_tiled(self):
im = Image.open('Tests/images/test-card-lossy-tiled.jp2')
im.load()
self.assert_image_similar(im, test_card, 2.0)
def test_lossless_rt(self):
im = self.roundtrip(test_card)
self.assert_image_equal(im, test_card)
def test_lossy_rt(self):
im = self.roundtrip(test_card, quality_layers=[20])
self.assert_image_similar(im, test_card, 2.0)
def test_tiled_rt(self):
im = self.roundtrip(test_card, tile_size=(128, 128))
self.assert_image_equal(im, test_card)
def test_tiled_offset_rt(self):
im = self.roundtrip(
test_card, tile_size=(128, 128),
tile_offset=(0, 0), offset=(32, 32))
self.assert_image_equal(im, test_card)
def test_irreversible_rt(self):
im = self.roundtrip(test_card, irreversible=True, quality_layers=[20])
self.assert_image_similar(im, test_card, 2.0)
def test_prog_qual_rt(self):
im = self.roundtrip(
test_card, quality_layers=[60, 40, 20], progression='LRCP')
self.assert_image_similar(im, test_card, 2.0)
def test_prog_res_rt(self):
im = self.roundtrip(test_card, num_resolutions=8, progression='RLCP')
self.assert_image_equal(im, test_card)
def test_reduce(self):
im = Image.open('Tests/images/test-card-lossless.jp2')
im.reduce = 2
im.load()
self.assertEqual(im.size, (160, 120))
def test_layers_type(self):
outfile = self.tempfile('temp_layers.jp2')
for quality_layers in [
[100, 50, 10],
(100, 50, 10),
None
]:
test_card.save(outfile, quality_layers=quality_layers)
for quality_layers in [
'quality_layers',
('100', '50', '10')
]:
self.assertRaises(ValueError, test_card.save, outfile,
quality_layers=quality_layers)
def test_layers(self):
out = BytesIO()
test_card.save(out, 'JPEG2000', quality_layers=[100, 50, 10],
progression='LRCP')
out.seek(0)
im = Image.open(out)
im.layers = 1
im.load()
self.assert_image_similar(im, test_card, 13)
out.seek(0)
im = Image.open(out)
im.layers = 3
im.load()
self.assert_image_similar(im, test_card, 0.4)
def test_rgba(self):
# Arrange
j2k = Image.open('Tests/images/rgb_trns_ycbc.j2k')
jp2 = Image.open('Tests/images/rgb_trns_ycbc.jp2')
# Act
j2k.load()
jp2.load()
# Assert
self.assertEqual(j2k.mode, 'RGBA')
self.assertEqual(jp2.mode, 'RGBA')
def test_16bit_monochrome_has_correct_mode(self):
j2k = Image.open('Tests/images/16bit.cropped.j2k')
jp2 = Image.open('Tests/images/16bit.cropped.jp2')
j2k.load()
jp2.load()
self.assertEqual(j2k.mode, 'I;16')
self.assertEqual(jp2.mode, 'I;16')
def test_16bit_monochrome_jp2_like_tiff(self):
tiff_16bit = Image.open('Tests/images/16bit.cropped.tif')
jp2 = Image.open('Tests/images/16bit.cropped.jp2')
self.assert_image_similar(jp2, tiff_16bit, 1e-3)
def test_16bit_monochrome_j2k_like_tiff(self):
tiff_16bit = Image.open('Tests/images/16bit.cropped.tif')
j2k = Image.open('Tests/images/16bit.cropped.j2k')
self.assert_image_similar(j2k, tiff_16bit, 1e-3)
def test_16bit_j2k_roundtrips(self):
j2k = Image.open('Tests/images/16bit.cropped.j2k')
im = self.roundtrip(j2k)
self.assert_image_equal(im, j2k)
def test_16bit_jp2_roundtrips(self):
jp2 = Image.open('Tests/images/16bit.cropped.jp2')
im = self.roundtrip(jp2)
self.assert_image_equal(im, jp2)
def test_unbound_local(self):
# prepatch, a malformed jp2 file could cause an UnboundLocalError
# exception.
with self.assertRaises(IOError):
Image.open('Tests/images/unbound_variable.jp2')
def test_parser_feed(self):
# Arrange
from PIL import ImageFile
with open('Tests/images/test-card-lossless.jp2', 'rb') as f:
data = f.read()
# Act
p = ImageFile.Parser()
p.feed(data)
# Assert
self.assertEqual(p.image.size, (640, 480))