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Pillow/Tests/test_file_jpeg.py
Jon Dufresne 4f185329f4 Streamline test skipping based on supported features 
This adds a new test decorator: skip_unless_feature(). The argument is
the same as passed to features.check(). If the feature is not supported,
the test will be skipped.

This removes several kinds of boilerplate copied and pasted around tests
so test feature checking is handled and displayed more consistently.

Refs #4193
2020-02-18 13:07:01 -08:00

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import os
from io import BytesIO
import pytest
from PIL import ExifTags, Image, ImageFile, JpegImagePlugin
from .helper import (
PillowTestCase,
assert_image,
assert_image_equal,
assert_image_similar,
cjpeg_available,
djpeg_available,
hopper,
is_win32,
skip_unless_feature,
unittest,
)
TEST_FILE = "Tests/images/hopper.jpg"
@skip_unless_feature("jpg")
class TestFileJpeg(PillowTestCase):
def roundtrip(self, im, **options):
out = BytesIO()
im.save(out, "JPEG", **options)
test_bytes = out.tell()
out.seek(0)
im = Image.open(out)
im.bytes = test_bytes # for testing only
return im
def gen_random_image(self, size, mode="RGB"):
""" Generates a very hard to compress file
:param size: tuple
:param mode: optional image mode
"""
return Image.frombytes(mode, size, os.urandom(size[0] * size[1] * len(mode)))
def test_sanity(self):
# internal version number
self.assertRegex(Image.core.jpeglib_version, r"\d+\.\d+$")
with Image.open(TEST_FILE) as im:
im.load()
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.format, "JPEG")
self.assertEqual(im.get_format_mimetype(), "image/jpeg")
def test_app(self):
# Test APP/COM reader (@PIL135)
with Image.open(TEST_FILE) as im:
self.assertEqual(
im.applist[0], ("APP0", b"JFIF\x00\x01\x01\x01\x00`\x00`\x00\x00")
)
self.assertEqual(
im.applist[1], ("COM", b"File written by Adobe Photoshop\xa8 4.0\x00")
)
self.assertEqual(len(im.applist), 2)
def test_cmyk(self):
# Test CMYK handling. Thanks to Tim and Charlie for test data,
# Michael for getting me to look one more time.
f = "Tests/images/pil_sample_cmyk.jpg"
with Image.open(f) as im:
# the source image has red pixels in the upper left corner.
c, m, y, k = [x / 255.0 for x in im.getpixel((0, 0))]
self.assertEqual(c, 0.0)
self.assertGreater(m, 0.8)
self.assertGreater(y, 0.8)
self.assertEqual(k, 0.0)
# the opposite corner is black
c, m, y, k = [
x / 255.0 for x in im.getpixel((im.size[0] - 1, im.size[1] - 1))
]
self.assertGreater(k, 0.9)
# roundtrip, and check again
im = self.roundtrip(im)
c, m, y, k = [x / 255.0 for x in im.getpixel((0, 0))]
self.assertEqual(c, 0.0)
self.assertGreater(m, 0.8)
self.assertGreater(y, 0.8)
self.assertEqual(k, 0.0)
c, m, y, k = [
x / 255.0 for x in im.getpixel((im.size[0] - 1, im.size[1] - 1))
]
self.assertGreater(k, 0.9)
def test_dpi(self):
def test(xdpi, ydpi=None):
with Image.open(TEST_FILE) as im:
im = self.roundtrip(im, dpi=(xdpi, ydpi or xdpi))
return im.info.get("dpi")
self.assertEqual(test(72), (72, 72))
self.assertEqual(test(300), (300, 300))
self.assertEqual(test(100, 200), (100, 200))
self.assertIsNone(test(0)) # square pixels
def test_icc(self):
# Test ICC support
with Image.open("Tests/images/rgb.jpg") as im1:
icc_profile = im1.info["icc_profile"]
self.assertEqual(len(icc_profile), 3144)
# Roundtrip via physical file.
f = self.tempfile("temp.jpg")
im1.save(f, icc_profile=icc_profile)
with Image.open(f) as im2:
self.assertEqual(im2.info.get("icc_profile"), icc_profile)
# Roundtrip via memory buffer.
im1 = self.roundtrip(hopper())
im2 = self.roundtrip(hopper(), icc_profile=icc_profile)
assert_image_equal(im1, im2)
self.assertFalse(im1.info.get("icc_profile"))
self.assertTrue(im2.info.get("icc_profile"))
def test_icc_big(self):
# Make sure that the "extra" support handles large blocks
def test(n):
# The ICC APP marker can store 65519 bytes per marker, so
# using a 4-byte test code should allow us to detect out of
# order issues.
icc_profile = (b"Test" * int(n / 4 + 1))[:n]
self.assertEqual(len(icc_profile), n) # sanity
im1 = self.roundtrip(hopper(), icc_profile=icc_profile)
self.assertEqual(im1.info.get("icc_profile"), icc_profile or None)
test(0)
test(1)
test(3)
test(4)
test(5)
test(65533 - 14) # full JPEG marker block
test(65533 - 14 + 1) # full block plus one byte
test(ImageFile.MAXBLOCK) # full buffer block
test(ImageFile.MAXBLOCK + 1) # full buffer block plus one byte
test(ImageFile.MAXBLOCK * 4 + 3) # large block
def test_large_icc_meta(self):
# https://github.com/python-pillow/Pillow/issues/148
# Sometimes the meta data on the icc_profile block is bigger than
# Image.MAXBLOCK or the image size.
with Image.open("Tests/images/icc_profile_big.jpg") as im:
f = self.tempfile("temp.jpg")
icc_profile = im.info["icc_profile"]
# Should not raise IOError for image with icc larger than image size.
im.save(
f,
format="JPEG",
progressive=True,
quality=95,
icc_profile=icc_profile,
optimize=True,
)
def test_optimize(self):
im1 = self.roundtrip(hopper())
im2 = self.roundtrip(hopper(), optimize=0)
im3 = self.roundtrip(hopper(), optimize=1)
assert_image_equal(im1, im2)
assert_image_equal(im1, im3)
self.assertGreaterEqual(im1.bytes, im2.bytes)
self.assertGreaterEqual(im1.bytes, im3.bytes)
def test_optimize_large_buffer(self):
# https://github.com/python-pillow/Pillow/issues/148
f = self.tempfile("temp.jpg")
# this requires ~ 1.5x Image.MAXBLOCK
im = Image.new("RGB", (4096, 4096), 0xFF3333)
im.save(f, format="JPEG", optimize=True)
def test_progressive(self):
im1 = self.roundtrip(hopper())
im2 = self.roundtrip(hopper(), progressive=False)
im3 = self.roundtrip(hopper(), progressive=True)
self.assertFalse(im1.info.get("progressive"))
self.assertFalse(im2.info.get("progressive"))
self.assertTrue(im3.info.get("progressive"))
assert_image_equal(im1, im3)
self.assertGreaterEqual(im1.bytes, im3.bytes)
def test_progressive_large_buffer(self):
f = self.tempfile("temp.jpg")
# this requires ~ 1.5x Image.MAXBLOCK
im = Image.new("RGB", (4096, 4096), 0xFF3333)
im.save(f, format="JPEG", progressive=True)
def test_progressive_large_buffer_highest_quality(self):
f = self.tempfile("temp.jpg")
im = self.gen_random_image((255, 255))
# this requires more bytes than pixels in the image
im.save(f, format="JPEG", progressive=True, quality=100)
def test_progressive_cmyk_buffer(self):
# Issue 2272, quality 90 cmyk image is tripping the large buffer bug.
f = BytesIO()
im = self.gen_random_image((256, 256), "CMYK")
im.save(f, format="JPEG", progressive=True, quality=94)
def test_large_exif(self):
# https://github.com/python-pillow/Pillow/issues/148
f = self.tempfile("temp.jpg")
im = hopper()
im.save(f, "JPEG", quality=90, exif=b"1" * 65532)
def test_exif_typeerror(self):
with Image.open("Tests/images/exif_typeerror.jpg") as im:
# Should not raise a TypeError
im._getexif()
def test_exif_gps(self):
# Arrange
with Image.open("Tests/images/exif_gps.jpg") as im:
gps_index = 34853
expected_exif_gps = {
0: b"\x00\x00\x00\x01",
2: (4294967295, 1),
5: b"\x01",
30: 65535,
29: "1999:99:99 99:99:99",
}
# Act
exif = im._getexif()
# Assert
self.assertEqual(exif[gps_index], expected_exif_gps)
def test_exif_rollback(self):
# rolling back exif support in 3.1 to pre-3.0 formatting.
# expected from 2.9, with b/u qualifiers switched for 3.2 compatibility
# this test passes on 2.9 and 3.1, but not 3.0
expected_exif = {
34867: 4294967295,
258: (24, 24, 24),
36867: "2099:09:29 10:10:10",
34853: {
0: b"\x00\x00\x00\x01",
2: (4294967295, 1),
5: b"\x01",
30: 65535,
29: "1999:99:99 99:99:99",
},
296: 65535,
34665: 185,
41994: 65535,
514: 4294967295,
271: "Make",
272: "XXX-XXX",
305: "PIL",
42034: ((1, 1), (1, 1), (1, 1), (1, 1)),
42035: "LensMake",
34856: b"\xaa\xaa\xaa\xaa\xaa\xaa",
282: (4294967295, 1),
33434: (4294967295, 1),
}
with Image.open("Tests/images/exif_gps.jpg") as im:
exif = im._getexif()
for tag, value in expected_exif.items():
self.assertEqual(value, exif[tag])
def test_exif_gps_typeerror(self):
with Image.open("Tests/images/exif_gps_typeerror.jpg") as im:
# Should not raise a TypeError
im._getexif()
def test_progressive_compat(self):
im1 = self.roundtrip(hopper())
self.assertFalse(im1.info.get("progressive"))
self.assertFalse(im1.info.get("progression"))
im2 = self.roundtrip(hopper(), progressive=0)
im3 = self.roundtrip(hopper(), progression=0) # compatibility
self.assertFalse(im2.info.get("progressive"))
self.assertFalse(im2.info.get("progression"))
self.assertFalse(im3.info.get("progressive"))
self.assertFalse(im3.info.get("progression"))
im2 = self.roundtrip(hopper(), progressive=1)
im3 = self.roundtrip(hopper(), progression=1) # compatibility
assert_image_equal(im1, im2)
assert_image_equal(im1, im3)
self.assertTrue(im2.info.get("progressive"))
self.assertTrue(im2.info.get("progression"))
self.assertTrue(im3.info.get("progressive"))
self.assertTrue(im3.info.get("progression"))
def test_quality(self):
im1 = self.roundtrip(hopper())
im2 = self.roundtrip(hopper(), quality=50)
assert_image(im1, im2.mode, im2.size)
self.assertGreaterEqual(im1.bytes, im2.bytes)
def test_smooth(self):
im1 = self.roundtrip(hopper())
im2 = self.roundtrip(hopper(), smooth=100)
assert_image(im1, im2.mode, im2.size)
def test_subsampling(self):
def getsampling(im):
layer = im.layer
return layer[0][1:3] + layer[1][1:3] + layer[2][1:3]
# experimental API
im = self.roundtrip(hopper(), subsampling=-1) # default
self.assertEqual(getsampling(im), (2, 2, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling=0) # 4:4:4
self.assertEqual(getsampling(im), (1, 1, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling=1) # 4:2:2
self.assertEqual(getsampling(im), (2, 1, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling=2) # 4:2:0
self.assertEqual(getsampling(im), (2, 2, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling=3) # default (undefined)
self.assertEqual(getsampling(im), (2, 2, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling="4:4:4")
self.assertEqual(getsampling(im), (1, 1, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling="4:2:2")
self.assertEqual(getsampling(im), (2, 1, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling="4:2:0")
self.assertEqual(getsampling(im), (2, 2, 1, 1, 1, 1))
im = self.roundtrip(hopper(), subsampling="4:1:1")
self.assertEqual(getsampling(im), (2, 2, 1, 1, 1, 1))
self.assertRaises(TypeError, self.roundtrip, hopper(), subsampling="1:1:1")
def test_exif(self):
with Image.open("Tests/images/pil_sample_rgb.jpg") as im:
info = im._getexif()
self.assertEqual(info[305], "Adobe Photoshop CS Macintosh")
def test_mp(self):
with Image.open("Tests/images/pil_sample_rgb.jpg") as im:
self.assertIsNone(im._getmp())
def test_quality_keep(self):
# RGB
with Image.open("Tests/images/hopper.jpg") as im:
f = self.tempfile("temp.jpg")
im.save(f, quality="keep")
# Grayscale
with Image.open("Tests/images/hopper_gray.jpg") as im:
f = self.tempfile("temp.jpg")
im.save(f, quality="keep")
# CMYK
with Image.open("Tests/images/pil_sample_cmyk.jpg") as im:
f = self.tempfile("temp.jpg")
im.save(f, quality="keep")
def test_junk_jpeg_header(self):
# https://github.com/python-pillow/Pillow/issues/630
filename = "Tests/images/junk_jpeg_header.jpg"
with Image.open(filename):
pass
def test_ff00_jpeg_header(self):
filename = "Tests/images/jpeg_ff00_header.jpg"
with Image.open(filename):
pass
def test_truncated_jpeg_should_read_all_the_data(self):
filename = "Tests/images/truncated_jpeg.jpg"
ImageFile.LOAD_TRUNCATED_IMAGES = True
with Image.open(filename) as im:
im.load()
ImageFile.LOAD_TRUNCATED_IMAGES = False
self.assertIsNotNone(im.getbbox())
def test_truncated_jpeg_throws_IOError(self):
filename = "Tests/images/truncated_jpeg.jpg"
with Image.open(filename) as im:
with self.assertRaises(IOError):
im.load()
# Test that the error is raised if loaded a second time
with self.assertRaises(IOError):
im.load()
def _n_qtables_helper(self, n, test_file):
with Image.open(test_file) as im:
f = self.tempfile("temp.jpg")
im.save(f, qtables=[[n] * 64] * n)
with Image.open(f) as im:
self.assertEqual(len(im.quantization), n)
reloaded = self.roundtrip(im, qtables="keep")
self.assertEqual(im.quantization, reloaded.quantization)
def test_qtables(self):
with Image.open("Tests/images/hopper.jpg") as im:
qtables = im.quantization
reloaded = self.roundtrip(im, qtables=qtables, subsampling=0)
self.assertEqual(im.quantization, reloaded.quantization)
assert_image_similar(im, self.roundtrip(im, qtables="web_low"), 30)
assert_image_similar(im, self.roundtrip(im, qtables="web_high"), 30)
assert_image_similar(im, self.roundtrip(im, qtables="keep"), 30)
# valid bounds for baseline qtable
bounds_qtable = [int(s) for s in ("255 1 " * 32).split(None)]
self.roundtrip(im, qtables=[bounds_qtable])
# values from wizard.txt in jpeg9-a src package.
standard_l_qtable = [
int(s)
for s in """
16 11 10 16 24 40 51 61
12 12 14 19 26 58 60 55
14 13 16 24 40 57 69 56
14 17 22 29 51 87 80 62
18 22 37 56 68 109 103 77
24 35 55 64 81 104 113 92
49 64 78 87 103 121 120 101
72 92 95 98 112 100 103 99
""".split(
None
)
]
standard_chrominance_qtable = [
int(s)
for s in """
17 18 24 47 99 99 99 99
18 21 26 66 99 99 99 99
24 26 56 99 99 99 99 99
47 66 99 99 99 99 99 99
99 99 99 99 99 99 99 99
99 99 99 99 99 99 99 99
99 99 99 99 99 99 99 99
99 99 99 99 99 99 99 99
""".split(
None
)
]
# list of qtable lists
assert_image_similar(
im,
self.roundtrip(
im, qtables=[standard_l_qtable, standard_chrominance_qtable]
),
30,
)
# tuple of qtable lists
assert_image_similar(
im,
self.roundtrip(
im, qtables=(standard_l_qtable, standard_chrominance_qtable)
),
30,
)
# dict of qtable lists
assert_image_similar(
im,
self.roundtrip(
im, qtables={0: standard_l_qtable, 1: standard_chrominance_qtable}
),
30,
)
self._n_qtables_helper(1, "Tests/images/hopper_gray.jpg")
self._n_qtables_helper(1, "Tests/images/pil_sample_rgb.jpg")
self._n_qtables_helper(2, "Tests/images/pil_sample_rgb.jpg")
self._n_qtables_helper(3, "Tests/images/pil_sample_rgb.jpg")
self._n_qtables_helper(1, "Tests/images/pil_sample_cmyk.jpg")
self._n_qtables_helper(2, "Tests/images/pil_sample_cmyk.jpg")
self._n_qtables_helper(3, "Tests/images/pil_sample_cmyk.jpg")
self._n_qtables_helper(4, "Tests/images/pil_sample_cmyk.jpg")
# not a sequence
self.assertRaises(ValueError, self.roundtrip, im, qtables="a")
# sequence wrong length
self.assertRaises(ValueError, self.roundtrip, im, qtables=[])
# sequence wrong length
self.assertRaises(ValueError, self.roundtrip, im, qtables=[1, 2, 3, 4, 5])
# qtable entry not a sequence
self.assertRaises(ValueError, self.roundtrip, im, qtables=[1])
# qtable entry has wrong number of items
self.assertRaises(ValueError, self.roundtrip, im, qtables=[[1, 2, 3, 4]])
@unittest.skipUnless(djpeg_available(), "djpeg not available")
def test_load_djpeg(self):
with Image.open(TEST_FILE) as img:
img.load_djpeg()
assert_image_similar(img, Image.open(TEST_FILE), 0)
@unittest.skipUnless(cjpeg_available(), "cjpeg not available")
def test_save_cjpeg(self):
with Image.open(TEST_FILE) as img:
tempfile = self.tempfile("temp.jpg")
JpegImagePlugin._save_cjpeg(img, 0, tempfile)
# Default save quality is 75%, so a tiny bit of difference is alright
assert_image_similar(img, Image.open(tempfile), 17)
def test_no_duplicate_0x1001_tag(self):
# Arrange
tag_ids = {v: k for k, v in ExifTags.TAGS.items()}
# Assert
self.assertEqual(tag_ids["RelatedImageWidth"], 0x1001)
self.assertEqual(tag_ids["RelatedImageLength"], 0x1002)
def test_MAXBLOCK_scaling(self):
im = self.gen_random_image((512, 512))
f = self.tempfile("temp.jpeg")
im.save(f, quality=100, optimize=True)
with Image.open(f) as reloaded:
# none of these should crash
reloaded.save(f, quality="keep")
reloaded.save(f, quality="keep", progressive=True)
reloaded.save(f, quality="keep", optimize=True)
def test_bad_mpo_header(self):
""" Treat unknown MPO as JPEG """
# Arrange
# Act
# Shouldn't raise error
fn = "Tests/images/sugarshack_bad_mpo_header.jpg"
with pytest.warns(UserWarning, Image.open, fn) as im:
# Assert
self.assertEqual(im.format, "JPEG")
def test_save_correct_modes(self):
out = BytesIO()
for mode in ["1", "L", "RGB", "RGBX", "CMYK", "YCbCr"]:
img = Image.new(mode, (20, 20))
img.save(out, "JPEG")
def test_save_wrong_modes(self):
# ref https://github.com/python-pillow/Pillow/issues/2005
out = BytesIO()
for mode in ["LA", "La", "RGBA", "RGBa", "P"]:
img = Image.new(mode, (20, 20))
self.assertRaises(IOError, img.save, out, "JPEG")
def test_save_tiff_with_dpi(self):
# Arrange
outfile = self.tempfile("temp.tif")
with Image.open("Tests/images/hopper.tif") as im:
# Act
im.save(outfile, "JPEG", dpi=im.info["dpi"])
# Assert
with Image.open(outfile) as reloaded:
reloaded.load()
self.assertEqual(im.info["dpi"], reloaded.info["dpi"])
def test_load_dpi_rounding(self):
# Round up
with Image.open("Tests/images/iptc_roundUp.jpg") as im:
self.assertEqual(im.info["dpi"], (44, 44))
# Round down
with Image.open("Tests/images/iptc_roundDown.jpg") as im:
self.assertEqual(im.info["dpi"], (2, 2))
def test_save_dpi_rounding(self):
outfile = self.tempfile("temp.jpg")
with Image.open("Tests/images/hopper.jpg") as im:
im.save(outfile, dpi=(72.2, 72.2))
with Image.open(outfile) as reloaded:
self.assertEqual(reloaded.info["dpi"], (72, 72))
im.save(outfile, dpi=(72.8, 72.8))
with Image.open(outfile) as reloaded:
self.assertEqual(reloaded.info["dpi"], (73, 73))
def test_dpi_tuple_from_exif(self):
# Arrange
# This Photoshop CC 2017 image has DPI in EXIF not metadata
# EXIF XResolution is (2000000, 10000)
with Image.open("Tests/images/photoshop-200dpi.jpg") as im:
# Act / Assert
self.assertEqual(im.info.get("dpi"), (200, 200))
def test_dpi_int_from_exif(self):
# Arrange
# This image has DPI in EXIF not metadata
# EXIF XResolution is 72
with Image.open("Tests/images/exif-72dpi-int.jpg") as im:
# Act / Assert
self.assertEqual(im.info.get("dpi"), (72, 72))
def test_dpi_from_dpcm_exif(self):
# Arrange
# This is photoshop-200dpi.jpg with EXIF resolution unit set to cm:
# exiftool -exif:ResolutionUnit=cm photoshop-200dpi.jpg
with Image.open("Tests/images/exif-200dpcm.jpg") as im:
# Act / Assert
self.assertEqual(im.info.get("dpi"), (508, 508))
def test_dpi_exif_zero_division(self):
# Arrange
# This is photoshop-200dpi.jpg with EXIF resolution set to 0/0:
# exiftool -XResolution=0/0 -YResolution=0/0 photoshop-200dpi.jpg
with Image.open("Tests/images/exif-dpi-zerodivision.jpg") as im:
# Act / Assert
# This should return the default, and not raise a ZeroDivisionError
self.assertEqual(im.info.get("dpi"), (72, 72))
def test_no_dpi_in_exif(self):
# Arrange
# This is photoshop-200dpi.jpg with resolution removed from EXIF:
# exiftool "-*resolution*"= photoshop-200dpi.jpg
with Image.open("Tests/images/no-dpi-in-exif.jpg") as im:
# Act / Assert
# "When the image resolution is unknown, 72 [dpi] is designated."
# http://www.exiv2.org/tags.html
self.assertEqual(im.info.get("dpi"), (72, 72))
def test_invalid_exif(self):
# This is no-dpi-in-exif with the tiff header of the exif block
# hexedited from MM * to FF FF FF FF
with Image.open("Tests/images/invalid-exif.jpg") as im:
# This should return the default, and not a SyntaxError or
# OSError for unidentified image.
self.assertEqual(im.info.get("dpi"), (72, 72))
def test_invalid_exif_x_resolution(self):
# When no x or y resolution is defined in EXIF
with Image.open("Tests/images/invalid-exif-without-x-resolution.jpg") as im:
# This should return the default, and not a ValueError or
# OSError for an unidentified image.
self.assertEqual(im.info.get("dpi"), (72, 72))
def test_ifd_offset_exif(self):
# Arrange
# This image has been manually hexedited to have an IFD offset of 10,
# in contrast to normal 8
with Image.open("Tests/images/exif-ifd-offset.jpg") as im:
# Act / Assert
self.assertEqual(im._getexif()[306], "2017:03:13 23:03:09")
def test_photoshop(self):
with Image.open("Tests/images/photoshop-200dpi.jpg") as im:
self.assertEqual(
im.info["photoshop"][0x03ED],
{
"XResolution": 200.0,
"DisplayedUnitsX": 1,
"YResolution": 200.0,
"DisplayedUnitsY": 1,
},
)
# Test that the image can still load, even with broken Photoshop data
# This image had the APP13 length hexedited to be smaller
with Image.open("Tests/images/photoshop-200dpi-broken.jpg") as im_broken:
assert_image_equal(im_broken, im)
# This image does not contain a Photoshop header string
with Image.open("Tests/images/app13.jpg") as im:
self.assertNotIn("photoshop", im.info)
def test_photoshop_malformed_and_multiple(self):
with Image.open("Tests/images/app13-multiple.jpg") as im:
self.assertIn("photoshop", im.info)
self.assertEqual(24, len(im.info["photoshop"]))
apps_13_lengths = [len(v) for k, v in im.applist if k == "APP13"]
self.assertEqual([65504, 24], apps_13_lengths)
@unittest.skipUnless(is_win32(), "Windows only")
@skip_unless_feature("jpg")
class TestFileCloseW32(PillowTestCase):
def test_fd_leak(self):
tmpfile = self.tempfile("temp.jpg")
with Image.open("Tests/images/hopper.jpg") as im:
im.save(tmpfile)
im = Image.open(tmpfile)
fp = im.fp
self.assertFalse(fp.closed)
self.assertRaises(WindowsError, os.remove, tmpfile)
im.load()
self.assertTrue(fp.closed)
# this should not fail, as load should have closed the file.
os.remove(tmpfile)
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