python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2024-12-30 20:06:17 +03:00
Code Issues Packages Projects Releases Wiki Activity
8659cd7564
Pillow/Tests/test_image.py
Alexander 0054743100 fix zero size images
2017-09-17 02:58:01 +03:00

531 lines
16 KiB
Python
Raw Blame History

from helper import unittest, PillowTestCase, hopper
from PIL import Image
import os
import sys
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)
im.size = (3, 4)
self.assertEqual(im.width, 3)
self.assertEqual(im.height, 4)
def test_invalid_image(self):
if str is bytes:
import StringIO
im = StringIO.StringIO('')
else:
import io
im = io.BytesIO(b'')
self.assertRaises(IOError, Image.open, im)
def test_bad_mode(self):
self.assertRaises(ValueError, Image.open, "filename", "bad mode")
@unittest.skipIf(sys.version_info < (3, 4),
"pathlib only available in Python 3.4 or later")
def test_pathlib(self):
from pathlib 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)
test_file = self.tempfile("temp.ppm")
im._dump(test_file)
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 == 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(bool(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")
self.assertNotEqual(im.getpixel((0, 0)), im.getpixel((0, 1)))
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_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.assertEqual(new_im.palette, None)
_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())
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',))
if __name__ == '__main__':
unittest.main()
Reference in New Issue View Git Blame Copy Permalink