mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-11 04:07:21 +03:00
4de5477b61
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.
563 lines
17 KiB
Python
563 lines
17 KiB
Python
from .helper import unittest, PillowTestCase, hopper
|
|
|
|
from PIL import Image
|
|
from PIL._util import py3
|
|
import os
|
|
|
|
|
|
class TestImage(PillowTestCase):
|
|
|
|
def test_image_modes_success(self):
|
|
for mode in [
|
|
'1', 'P', 'PA',
|
|
'L', 'LA', 'La',
|
|
'F', 'I', 'I;16', 'I;16L', 'I;16B', 'I;16N',
|
|
'RGB', 'RGBX', 'RGBA', 'RGBa',
|
|
'CMYK', 'YCbCr', 'LAB', 'HSV',
|
|
]:
|
|
Image.new(mode, (1, 1))
|
|
|
|
def test_image_modes_fail(self):
|
|
for mode in [
|
|
'', 'bad', 'very very long',
|
|
'BGR;15', 'BGR;16', 'BGR;24', 'BGR;32'
|
|
]:
|
|
with self.assertRaises(ValueError) as e:
|
|
Image.new(mode, (1, 1))
|
|
self.assertEqual(str(e.exception), 'unrecognized image mode')
|
|
|
|
def test_sanity(self):
|
|
|
|
im = Image.new("L", (100, 100))
|
|
self.assertEqual(
|
|
repr(im)[:45], "<PIL.Image.Image image mode=L size=100x100 at")
|
|
self.assertEqual(im.mode, "L")
|
|
self.assertEqual(im.size, (100, 100))
|
|
|
|
im = Image.new("RGB", (100, 100))
|
|
self.assertEqual(
|
|
repr(im)[:45], "<PIL.Image.Image image mode=RGB size=100x100 ")
|
|
self.assertEqual(im.mode, "RGB")
|
|
self.assertEqual(im.size, (100, 100))
|
|
|
|
Image.new("L", (100, 100), None)
|
|
im2 = Image.new("L", (100, 100), 0)
|
|
im3 = Image.new("L", (100, 100), "black")
|
|
|
|
self.assertEqual(im2.getcolors(), [(10000, 0)])
|
|
self.assertEqual(im3.getcolors(), [(10000, 0)])
|
|
|
|
self.assertRaises(ValueError, Image.new, "X", (100, 100))
|
|
self.assertRaises(ValueError, Image.new, "", (100, 100))
|
|
# self.assertRaises(MemoryError, Image.new, "L", (1000000, 1000000))
|
|
|
|
def test_width_height(self):
|
|
im = Image.new("RGB", (1, 2))
|
|
self.assertEqual(im.width, 1)
|
|
self.assertEqual(im.height, 2)
|
|
|
|
with self.assertRaises(AttributeError):
|
|
im.size = (3, 4)
|
|
|
|
def test_invalid_image(self):
|
|
if py3:
|
|
import io
|
|
im = io.BytesIO(b'')
|
|
else:
|
|
import StringIO
|
|
im = StringIO.StringIO('')
|
|
self.assertRaises(IOError, Image.open, im)
|
|
|
|
def test_bad_mode(self):
|
|
self.assertRaises(ValueError, Image.open, "filename", "bad mode")
|
|
|
|
@unittest.skipUnless(Image.HAS_PATHLIB, "requires pathlib/pathlib2")
|
|
def test_pathlib(self):
|
|
from PIL.Image import Path
|
|
im = Image.open(Path("Tests/images/hopper.jpg"))
|
|
self.assertEqual(im.mode, "RGB")
|
|
self.assertEqual(im.size, (128, 128))
|
|
|
|
temp_file = self.tempfile("temp.jpg")
|
|
if os.path.exists(temp_file):
|
|
os.remove(temp_file)
|
|
im.save(Path(temp_file))
|
|
|
|
def test_fp_name(self):
|
|
temp_file = self.tempfile("temp.jpg")
|
|
|
|
class FP(object):
|
|
def write(a, b):
|
|
pass
|
|
fp = FP()
|
|
fp.name = temp_file
|
|
|
|
im = hopper()
|
|
im.save(fp)
|
|
|
|
def test_tempfile(self):
|
|
# see #1460, pathlib support breaks tempfile.TemporaryFile on py27
|
|
# Will error out on save on 3.0.0
|
|
import tempfile
|
|
im = hopper()
|
|
with tempfile.TemporaryFile() as fp:
|
|
im.save(fp, 'JPEG')
|
|
fp.seek(0)
|
|
reloaded = Image.open(fp)
|
|
self.assert_image_similar(im, reloaded, 20)
|
|
|
|
def test_unknown_extension(self):
|
|
im = hopper()
|
|
temp_file = self.tempfile("temp.unknown")
|
|
self.assertRaises(ValueError, im.save, temp_file)
|
|
|
|
def test_internals(self):
|
|
im = Image.new("L", (100, 100))
|
|
im.readonly = 1
|
|
im._copy()
|
|
self.assertFalse(im.readonly)
|
|
|
|
im.readonly = 1
|
|
im.paste(0, (0, 0, 100, 100))
|
|
self.assertFalse(im.readonly)
|
|
|
|
def test_dump(self):
|
|
im = Image.new("L", (10, 10))
|
|
im._dump(self.tempfile("temp_L.ppm"))
|
|
|
|
im = Image.new("RGB", (10, 10))
|
|
im._dump(self.tempfile("temp_RGB.ppm"))
|
|
|
|
im = Image.new("HSV", (10, 10))
|
|
self.assertRaises(ValueError, im._dump, self.tempfile("temp_HSV.ppm"))
|
|
|
|
def test_comparison_with_other_type(self):
|
|
# Arrange
|
|
item = Image.new('RGB', (25, 25), '#000')
|
|
num = 12
|
|
|
|
# Act/Assert
|
|
# Shouldn't cause AttributeError (#774)
|
|
self.assertFalse(item is None)
|
|
self.assertFalse(item == num)
|
|
|
|
def test_expand_x(self):
|
|
# Arrange
|
|
im = hopper()
|
|
orig_size = im.size
|
|
xmargin = 5
|
|
|
|
# Act
|
|
im = im._expand(xmargin)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size[0], orig_size[0] + 2*xmargin)
|
|
self.assertEqual(im.size[1], orig_size[1] + 2*xmargin)
|
|
|
|
def test_expand_xy(self):
|
|
# Arrange
|
|
im = hopper()
|
|
orig_size = im.size
|
|
xmargin = 5
|
|
ymargin = 3
|
|
|
|
# Act
|
|
im = im._expand(xmargin, ymargin)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size[0], orig_size[0] + 2*xmargin)
|
|
self.assertEqual(im.size[1], orig_size[1] + 2*ymargin)
|
|
|
|
def test_getbands(self):
|
|
# Assert
|
|
self.assertEqual(hopper('RGB').getbands(), ('R', 'G', 'B'))
|
|
self.assertEqual(hopper('YCbCr').getbands(), ('Y', 'Cb', 'Cr'))
|
|
|
|
def test_getchannel_wrong_params(self):
|
|
im = hopper()
|
|
|
|
self.assertRaises(ValueError, im.getchannel, -1)
|
|
self.assertRaises(ValueError, im.getchannel, 3)
|
|
self.assertRaises(ValueError, im.getchannel, 'Z')
|
|
self.assertRaises(ValueError, im.getchannel, '1')
|
|
|
|
def test_getchannel(self):
|
|
im = hopper('YCbCr')
|
|
Y, Cb, Cr = im.split()
|
|
|
|
self.assert_image_equal(Y, im.getchannel(0))
|
|
self.assert_image_equal(Y, im.getchannel('Y'))
|
|
self.assert_image_equal(Cb, im.getchannel(1))
|
|
self.assert_image_equal(Cb, im.getchannel('Cb'))
|
|
self.assert_image_equal(Cr, im.getchannel(2))
|
|
self.assert_image_equal(Cr, im.getchannel('Cr'))
|
|
|
|
def test_getbbox(self):
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
bbox = im.getbbox()
|
|
|
|
# Assert
|
|
self.assertEqual(bbox, (0, 0, 128, 128))
|
|
|
|
def test_ne(self):
|
|
# Arrange
|
|
im1 = Image.new('RGB', (25, 25), 'black')
|
|
im2 = Image.new('RGB', (25, 25), 'white')
|
|
|
|
# Act / Assert
|
|
self.assertNotEqual(im1, im2)
|
|
|
|
def test_alpha_composite(self):
|
|
# https://stackoverflow.com/questions/3374878
|
|
# Arrange
|
|
from PIL import ImageDraw
|
|
|
|
expected_colors = sorted([
|
|
(1122, (128, 127, 0, 255)),
|
|
(1089, (0, 255, 0, 255)),
|
|
(3300, (255, 0, 0, 255)),
|
|
(1156, (170, 85, 0, 192)),
|
|
(1122, (0, 255, 0, 128)),
|
|
(1122, (255, 0, 0, 128)),
|
|
(1089, (0, 255, 0, 0))])
|
|
|
|
dst = Image.new('RGBA', size=(100, 100), color=(0, 255, 0, 255))
|
|
draw = ImageDraw.Draw(dst)
|
|
draw.rectangle((0, 33, 100, 66), fill=(0, 255, 0, 128))
|
|
draw.rectangle((0, 67, 100, 100), fill=(0, 255, 0, 0))
|
|
src = Image.new('RGBA', size=(100, 100), color=(255, 0, 0, 255))
|
|
draw = ImageDraw.Draw(src)
|
|
draw.rectangle((33, 0, 66, 100), fill=(255, 0, 0, 128))
|
|
draw.rectangle((67, 0, 100, 100), fill=(255, 0, 0, 0))
|
|
|
|
# Act
|
|
img = Image.alpha_composite(dst, src)
|
|
|
|
# Assert
|
|
img_colors = sorted(img.getcolors())
|
|
self.assertEqual(img_colors, expected_colors)
|
|
|
|
def test_alpha_inplace(self):
|
|
src = Image.new('RGBA', (128, 128), 'blue')
|
|
|
|
over = Image.new('RGBA', (128, 128), 'red')
|
|
mask = hopper('L')
|
|
over.putalpha(mask)
|
|
|
|
target = Image.alpha_composite(src, over)
|
|
|
|
# basic
|
|
full = src.copy()
|
|
full.alpha_composite(over)
|
|
self.assert_image_equal(full, target)
|
|
|
|
# with offset down to right
|
|
offset = src.copy()
|
|
offset.alpha_composite(over, (64, 64))
|
|
self.assert_image_equal(offset.crop((64, 64, 127, 127)),
|
|
target.crop((0, 0, 63, 63)))
|
|
self.assertEqual(offset.size, (128, 128))
|
|
|
|
# offset and crop
|
|
box = src.copy()
|
|
box.alpha_composite(over, (64, 64), (0, 0, 32, 32))
|
|
self.assert_image_equal(box.crop((64, 64, 96, 96)),
|
|
target.crop((0, 0, 32, 32)))
|
|
self.assert_image_equal(box.crop((96, 96, 128, 128)),
|
|
src.crop((0, 0, 32, 32)))
|
|
self.assertEqual(box.size, (128, 128))
|
|
|
|
# source point
|
|
source = src.copy()
|
|
source.alpha_composite(over, (32, 32), (32, 32, 96, 96))
|
|
|
|
self.assert_image_equal(source.crop((32, 32, 96, 96)),
|
|
target.crop((32, 32, 96, 96)))
|
|
self.assertEqual(source.size, (128, 128))
|
|
|
|
# errors
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, "invalid source")
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, (0, 0),
|
|
"invalid destination")
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, 0)
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, (0, 0), 0)
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, (0, -1))
|
|
self.assertRaises(ValueError,
|
|
source.alpha_composite, over, (0, 0), (0, -1))
|
|
|
|
def test_registered_extensions_uninitialized(self):
|
|
# Arrange
|
|
Image._initialized = 0
|
|
extension = Image.EXTENSION
|
|
Image.EXTENSION = {}
|
|
|
|
# Act
|
|
Image.registered_extensions()
|
|
|
|
# Assert
|
|
self.assertEqual(Image._initialized, 2)
|
|
|
|
# Restore the original state and assert
|
|
Image.EXTENSION = extension
|
|
self.assertTrue(Image.EXTENSION)
|
|
|
|
def test_registered_extensions(self):
|
|
# Arrange
|
|
# Open an image to trigger plugin registration
|
|
Image.open('Tests/images/rgb.jpg')
|
|
|
|
# Act
|
|
extensions = Image.registered_extensions()
|
|
|
|
# Assert
|
|
self.assertTrue(extensions)
|
|
for ext in ['.cur', '.icns', '.tif', '.tiff']:
|
|
self.assertIn(ext, extensions)
|
|
|
|
def test_effect_mandelbrot(self):
|
|
# Arrange
|
|
size = (512, 512)
|
|
extent = (-3, -2.5, 2, 2.5)
|
|
quality = 100
|
|
|
|
# Act
|
|
im = Image.effect_mandelbrot(size, extent, quality)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size, (512, 512))
|
|
im2 = Image.open('Tests/images/effect_mandelbrot.png')
|
|
self.assert_image_equal(im, im2)
|
|
|
|
def test_effect_mandelbrot_bad_arguments(self):
|
|
# Arrange
|
|
size = (512, 512)
|
|
# Get coordinates the wrong way round:
|
|
extent = (+3, +2.5, -2, -2.5)
|
|
# Quality < 2:
|
|
quality = 1
|
|
|
|
# Act/Assert
|
|
self.assertRaises(
|
|
ValueError,
|
|
Image.effect_mandelbrot, size, extent, quality)
|
|
|
|
def test_effect_noise(self):
|
|
# Arrange
|
|
size = (100, 100)
|
|
sigma = 128
|
|
|
|
# Act
|
|
im = Image.effect_noise(size, sigma)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size, (100, 100))
|
|
self.assertEqual(im.mode, "L")
|
|
p0 = im.getpixel((0, 0))
|
|
p1 = im.getpixel((0, 1))
|
|
p2 = im.getpixel((0, 2))
|
|
p3 = im.getpixel((0, 3))
|
|
p4 = im.getpixel((0, 4))
|
|
self.assert_not_all_same([p0, p1, p2, p3, p4])
|
|
|
|
def test_effect_spread(self):
|
|
# Arrange
|
|
im = hopper()
|
|
distance = 10
|
|
|
|
# Act
|
|
im2 = im.effect_spread(distance)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size, (128, 128))
|
|
im3 = Image.open('Tests/images/effect_spread.png')
|
|
self.assert_image_similar(im2, im3, 110)
|
|
|
|
def test_check_size(self):
|
|
# Checking that the _check_size function throws value errors
|
|
# when we want it to.
|
|
with self.assertRaises(ValueError):
|
|
Image.new('RGB', 0) # not a tuple
|
|
with self.assertRaises(ValueError):
|
|
Image.new('RGB', (0,)) # Tuple too short
|
|
with self.assertRaises(ValueError):
|
|
Image.new('RGB', (-1, -1)) # w,h < 0
|
|
|
|
# this should pass with 0 sized images, #2259
|
|
im = Image.new('L', (0, 0))
|
|
self.assertEqual(im.size, (0, 0))
|
|
|
|
im = Image.new('L', (0, 100))
|
|
self.assertEqual(im.size, (0, 100))
|
|
|
|
im = Image.new('L', (100, 0))
|
|
self.assertEqual(im.size, (100, 0))
|
|
|
|
self.assertTrue(Image.new('RGB', (1, 1)))
|
|
# Should pass lists too
|
|
i = Image.new('RGB', [1, 1])
|
|
self.assertIsInstance(i.size, tuple)
|
|
|
|
def test_storage_neg(self):
|
|
# Storage.c accepted negative values for xsize, ysize. Was
|
|
# test_neg_ppm, but the core function for that has been
|
|
# removed Calling directly into core to test the error in
|
|
# Storage.c, rather than the size check above
|
|
|
|
with self.assertRaises(ValueError):
|
|
Image.core.fill('RGB', (2, -2), (0, 0, 0))
|
|
|
|
def test_offset_not_implemented(self):
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act / Assert
|
|
self.assertRaises(NotImplementedError, im.offset, None)
|
|
|
|
def test_fromstring(self):
|
|
self.assertRaises(NotImplementedError, Image.fromstring)
|
|
|
|
def test_linear_gradient_wrong_mode(self):
|
|
# Arrange
|
|
wrong_mode = "RGB"
|
|
|
|
# Act / Assert
|
|
self.assertRaises(ValueError,
|
|
Image.linear_gradient, wrong_mode)
|
|
|
|
def test_linear_gradient(self):
|
|
|
|
# Arrange
|
|
target_file = "Tests/images/linear_gradient.png"
|
|
for mode in ["L", "P"]:
|
|
|
|
# Act
|
|
im = Image.linear_gradient(mode)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size, (256, 256))
|
|
self.assertEqual(im.mode, mode)
|
|
self.assertEqual(im.getpixel((0, 0)), 0)
|
|
self.assertEqual(im.getpixel((255, 255)), 255)
|
|
target = Image.open(target_file).convert(mode)
|
|
self.assert_image_equal(im, target)
|
|
|
|
def test_radial_gradient_wrong_mode(self):
|
|
# Arrange
|
|
wrong_mode = "RGB"
|
|
|
|
# Act / Assert
|
|
self.assertRaises(ValueError,
|
|
Image.radial_gradient, wrong_mode)
|
|
|
|
def test_radial_gradient(self):
|
|
|
|
# Arrange
|
|
target_file = "Tests/images/radial_gradient.png"
|
|
for mode in ["L", "P"]:
|
|
|
|
# Act
|
|
im = Image.radial_gradient(mode)
|
|
|
|
# Assert
|
|
self.assertEqual(im.size, (256, 256))
|
|
self.assertEqual(im.mode, mode)
|
|
self.assertEqual(im.getpixel((0, 0)), 255)
|
|
self.assertEqual(im.getpixel((128, 128)), 0)
|
|
target = Image.open(target_file).convert(mode)
|
|
self.assert_image_equal(im, target)
|
|
|
|
def test_register_extensions(self):
|
|
test_format = "a"
|
|
exts = ["b", "c"]
|
|
for ext in exts:
|
|
Image.register_extension(test_format, ext)
|
|
ext_individual = Image.EXTENSION.copy()
|
|
for ext in exts:
|
|
del Image.EXTENSION[ext]
|
|
|
|
Image.register_extensions(test_format, exts)
|
|
ext_multiple = Image.EXTENSION.copy()
|
|
for ext in exts:
|
|
del Image.EXTENSION[ext]
|
|
|
|
self.assertEqual(ext_individual, ext_multiple)
|
|
|
|
def test_remap_palette(self):
|
|
# Test illegal image mode
|
|
im = hopper()
|
|
self.assertRaises(ValueError, im.remap_palette, None)
|
|
|
|
def test__new(self):
|
|
from PIL import ImagePalette
|
|
|
|
im = hopper('RGB')
|
|
im_p = hopper('P')
|
|
|
|
blank_p = Image.new('P', (10, 10))
|
|
blank_pa = Image.new('PA', (10, 10))
|
|
blank_p.palette = None
|
|
blank_pa.palette = None
|
|
|
|
def _make_new(base_image, im, palette_result=None):
|
|
new_im = base_image._new(im)
|
|
self.assertEqual(new_im.mode, im.mode)
|
|
self.assertEqual(new_im.size, im.size)
|
|
self.assertEqual(new_im.info, base_image.info)
|
|
if palette_result is not None:
|
|
self.assertEqual(new_im.palette.tobytes(),
|
|
palette_result.tobytes())
|
|
else:
|
|
self.assertIsNone(new_im.palette)
|
|
|
|
_make_new(im, im_p, im_p.palette)
|
|
_make_new(im_p, im, None)
|
|
_make_new(im, blank_p, ImagePalette.ImagePalette())
|
|
_make_new(im, blank_pa, ImagePalette.ImagePalette())
|
|
|
|
def test_no_resource_warning_on_save(self):
|
|
# https://github.com/python-pillow/Pillow/issues/835
|
|
# Arrange
|
|
test_file = 'Tests/images/hopper.png'
|
|
temp_file = self.tempfile("temp.jpg")
|
|
|
|
# Act/Assert
|
|
with Image.open(test_file) as im:
|
|
self.assert_warning(None, im.save, temp_file)
|
|
|
|
|
|
class MockEncoder(object):
|
|
pass
|
|
|
|
|
|
def mock_encode(*args):
|
|
encoder = MockEncoder()
|
|
encoder.args = args
|
|
return encoder
|
|
|
|
|
|
class TestRegistry(PillowTestCase):
|
|
|
|
def test_encode_registry(self):
|
|
|
|
Image.register_encoder('MOCK', mock_encode)
|
|
self.assertIn('MOCK', Image.ENCODERS)
|
|
|
|
enc = Image._getencoder('RGB', 'MOCK', ('args',), extra=('extra',))
|
|
|
|
self.assertIsInstance(enc, MockEncoder)
|
|
self.assertEqual(enc.args, ('RGB', 'args', 'extra'))
|
|
|
|
def test_encode_registry_fail(self):
|
|
self.assertRaises(IOError, Image._getencoder, 'RGB',
|
|
'DoesNotExist',
|
|
('args',),
|
|
extra=('extra',))
|