mirror of
https://github.com/python-pillow/Pillow.git
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479 lines
14 KiB
Python
479 lines
14 KiB
Python
from helper import unittest, PillowTestCase, hopper
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from PIL import Image
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import os
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import sys
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class TestImage(PillowTestCase):
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def test_image_modes_success(self):
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for mode in [
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'1', 'P', 'PA',
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'L', 'LA', 'La',
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'F', 'I', 'I;16', 'I;16L', 'I;16B', 'I;16N',
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'RGB', 'RGBX', 'RGBA', 'RGBa',
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'CMYK', 'YCbCr', 'LAB', 'HSV',
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]:
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Image.new(mode, (1, 1))
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def test_image_modes_fail(self):
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for mode in [
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'', 'bad', 'very very long',
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'BGR;15', 'BGR;16', 'BGR;24', 'BGR;32'
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]:
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with self.assertRaises(ValueError) as e:
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Image.new(mode, (1, 1));
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self.assertEqual(str(e.exception), 'unrecognized image mode')
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def test_sanity(self):
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im = Image.new("L", (100, 100))
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self.assertEqual(
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repr(im)[:45], "<PIL.Image.Image image mode=L size=100x100 at")
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self.assertEqual(im.mode, "L")
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self.assertEqual(im.size, (100, 100))
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im = Image.new("RGB", (100, 100))
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self.assertEqual(
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repr(im)[:45], "<PIL.Image.Image image mode=RGB size=100x100 ")
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (100, 100))
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Image.new("L", (100, 100), None)
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im2 = Image.new("L", (100, 100), 0)
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im3 = Image.new("L", (100, 100), "black")
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self.assertEqual(im2.getcolors(), [(10000, 0)])
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self.assertEqual(im3.getcolors(), [(10000, 0)])
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self.assertRaises(ValueError, lambda: Image.new("X", (100, 100)))
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self.assertRaises(ValueError, lambda: Image.new("", (100, 100)))
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# self.assertRaises(
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# MemoryError, lambda: Image.new("L", (1000000, 1000000)))
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def test_width_height(self):
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im = Image.new("RGB", (1, 2))
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self.assertEqual(im.width, 1)
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self.assertEqual(im.height, 2)
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im.size = (3, 4)
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self.assertEqual(im.width, 3)
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self.assertEqual(im.height, 4)
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def test_invalid_image(self):
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if str is bytes:
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import StringIO
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im = StringIO.StringIO('')
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else:
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import io
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im = io.BytesIO(b'')
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self.assertRaises(IOError, lambda: Image.open(im))
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@unittest.skipIf(sys.version_info < (3, 4),
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"pathlib only available in Python 3.4 or later")
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def test_pathlib(self):
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from pathlib import Path
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im = Image.open(Path("Tests/images/hopper.jpg"))
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self.assertEqual(im.mode, "RGB")
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self.assertEqual(im.size, (128, 128))
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temp_file = self.tempfile("temp.jpg")
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if os.path.exists(temp_file):
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os.remove(temp_file)
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im.save(Path(temp_file))
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def test_fp_name(self):
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temp_file = self.tempfile("temp.jpg")
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class FP(object):
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def write(a, b):
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pass
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fp = FP()
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fp.name = temp_file
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im = hopper()
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im.save(fp)
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def test_tempfile(self):
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# see #1460, pathlib support breaks tempfile.TemporaryFile on py27
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# Will error out on save on 3.0.0
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import tempfile
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im = hopper()
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with tempfile.TemporaryFile() as fp:
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im.save(fp, 'JPEG')
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fp.seek(0)
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reloaded = Image.open(fp)
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self.assert_image_similar(im, reloaded, 20)
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def test_unknown_extension(self):
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im = hopper()
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temp_file = self.tempfile("temp.unknown")
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self.assertRaises(ValueError, lambda: im.save(temp_file))
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def test_internals(self):
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im = Image.new("L", (100, 100))
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im.readonly = 1
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im._copy()
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self.assertFalse(im.readonly)
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im.readonly = 1
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im.paste(0, (0, 0, 100, 100))
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self.assertFalse(im.readonly)
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test_file = self.tempfile("temp.ppm")
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im._dump(test_file)
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def test_comparison_with_other_type(self):
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# Arrange
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item = Image.new('RGB', (25, 25), '#000')
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num = 12
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# Act/Assert
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# Shouldn't cause AttributeError (#774)
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self.assertFalse(item is None)
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self.assertFalse(item == None)
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self.assertFalse(item == num)
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def test_expand_x(self):
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# Arrange
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im = hopper()
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orig_size = im.size
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xmargin = 5
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# Act
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im = im._expand(xmargin)
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# Assert
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self.assertEqual(im.size[0], orig_size[0] + 2*xmargin)
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self.assertEqual(im.size[1], orig_size[1] + 2*xmargin)
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def test_expand_xy(self):
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# Arrange
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im = hopper()
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orig_size = im.size
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xmargin = 5
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ymargin = 3
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# Act
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im = im._expand(xmargin, ymargin)
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# Assert
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self.assertEqual(im.size[0], orig_size[0] + 2*xmargin)
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self.assertEqual(im.size[1], orig_size[1] + 2*ymargin)
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def test_getbands(self):
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# Assert
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self.assertEqual(hopper('RGB').getbands(), ('R', 'G', 'B'))
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self.assertEqual(hopper('YCbCr').getbands(), ('Y', 'Cb', 'Cr'))
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def test_getchannel_wrong_params(self):
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im = hopper()
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self.assertRaises(ValueError, im.getchannel, -1)
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self.assertRaises(ValueError, im.getchannel, 3)
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self.assertRaises(ValueError, im.getchannel, 'Z')
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self.assertRaises(ValueError, im.getchannel, '1')
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def test_getchannel(self):
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im = hopper('YCbCr')
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Y, Cb, Cr = im.split()
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self.assert_image_equal(Y, im.getchannel(0))
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self.assert_image_equal(Y, im.getchannel('Y'))
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self.assert_image_equal(Cb, im.getchannel(1))
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self.assert_image_equal(Cb, im.getchannel('Cb'))
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self.assert_image_equal(Cr, im.getchannel(2))
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self.assert_image_equal(Cr, im.getchannel('Cr'))
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def test_getbbox(self):
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# Arrange
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im = hopper()
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# Act
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bbox = im.getbbox()
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# Assert
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self.assertEqual(bbox, (0, 0, 128, 128))
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def test_ne(self):
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# Arrange
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im1 = Image.new('RGB', (25, 25), 'black')
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im2 = Image.new('RGB', (25, 25), 'white')
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# Act / Assert
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self.assertNotEqual(im1, im2)
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def test_alpha_composite(self):
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# https://stackoverflow.com/questions/3374878
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# Arrange
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from PIL import ImageDraw
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expected_colors = sorted([
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(1122, (128, 127, 0, 255)),
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(1089, (0, 255, 0, 255)),
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(3300, (255, 0, 0, 255)),
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(1156, (170, 85, 0, 192)),
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(1122, (0, 255, 0, 128)),
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(1122, (255, 0, 0, 128)),
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(1089, (0, 255, 0, 0))])
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dst = Image.new('RGBA', size=(100, 100), color=(0, 255, 0, 255))
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draw = ImageDraw.Draw(dst)
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draw.rectangle((0, 33, 100, 66), fill=(0, 255, 0, 128))
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draw.rectangle((0, 67, 100, 100), fill=(0, 255, 0, 0))
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src = Image.new('RGBA', size=(100, 100), color=(255, 0, 0, 255))
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draw = ImageDraw.Draw(src)
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draw.rectangle((33, 0, 66, 100), fill=(255, 0, 0, 128))
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draw.rectangle((67, 0, 100, 100), fill=(255, 0, 0, 0))
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# Act
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img = Image.alpha_composite(dst, src)
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# Assert
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img_colors = sorted(img.getcolors())
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self.assertEqual(img_colors, expected_colors)
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def test_alpha_inplace(self):
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src = Image.new('RGBA', (128,128), 'blue')
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over = Image.new('RGBA', (128,128), 'red')
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mask = hopper('L')
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over.putalpha(mask)
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target = Image.alpha_composite(src, over)
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# basic
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full = src.copy()
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full.alpha_composite(over)
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self.assert_image_equal(full, target)
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# with offset down to right
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offset = src.copy()
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offset.alpha_composite(over, (64, 64))
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self.assert_image_equal(offset.crop((64, 64, 127, 127)),
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target.crop((0, 0, 63, 63)))
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self.assertEqual(offset.size, (128, 128))
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# offset and crop
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box = src.copy()
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box.alpha_composite(over, (64, 64), (0, 0, 32, 32))
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self.assert_image_equal(box.crop((64, 64, 96, 96)),
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target.crop((0, 0, 32, 32)))
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self.assert_image_equal(box.crop((96, 96, 128, 128)),
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src.crop((0, 0, 32, 32)))
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self.assertEqual(box.size, (128, 128))
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# source point
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source = src.copy()
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source.alpha_composite(over, (32, 32), (32, 32, 96, 96))
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self.assert_image_equal(source.crop((32, 32, 96, 96)),
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target.crop((32, 32, 96, 96)))
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self.assertEqual(source.size, (128, 128))
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def test_registered_extensions_uninitialized(self):
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# Arrange
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Image._initialized = 0
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extension = Image.EXTENSION
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Image.EXTENSION = {}
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# Act
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Image.registered_extensions()
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# Assert
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self.assertEqual(Image._initialized, 2)
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# Restore the original state and assert
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Image.EXTENSION = extension
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self.assertTrue(Image.EXTENSION)
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def test_registered_extensions(self):
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# Arrange
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# Open an image to trigger plugin registration
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Image.open('Tests/images/rgb.jpg')
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# Act
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extensions = Image.registered_extensions()
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# Assert
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self.assertTrue(bool(extensions))
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for ext in ['.cur', '.icns', '.tif', '.tiff']:
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self.assertIn(ext, extensions)
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def test_effect_mandelbrot(self):
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# Arrange
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size = (512, 512)
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extent = (-3, -2.5, 2, 2.5)
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quality = 100
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# Act
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im = Image.effect_mandelbrot(size, extent, quality)
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# Assert
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self.assertEqual(im.size, (512, 512))
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im2 = Image.open('Tests/images/effect_mandelbrot.png')
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self.assert_image_equal(im, im2)
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def test_effect_mandelbrot_bad_arguments(self):
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# Arrange
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size = (512, 512)
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# Get coordinates the wrong way round:
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extent = (+3, +2.5, -2, -2.5)
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# Quality < 2:
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quality = 1
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# Act/Assert
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self.assertRaises(
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ValueError,
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lambda: Image.effect_mandelbrot(size, extent, quality))
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def test_effect_noise(self):
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# Arrange
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size = (100, 100)
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sigma = 128
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# Act
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im = Image.effect_noise(size, sigma)
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# Assert
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self.assertEqual(im.size, (100, 100))
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self.assertEqual(im.mode, "L")
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self.assertNotEqual(im.getpixel((0, 0)), im.getpixel((0, 1)))
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def test_effect_spread(self):
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# Arrange
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im = hopper()
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distance = 10
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# Act
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im2 = im.effect_spread(distance)
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# Assert
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self.assertEqual(im.size, (128, 128))
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im3 = Image.open('Tests/images/effect_spread.png')
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self.assert_image_similar(im2, im3, 110)
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def test_check_size(self):
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# Checking that the _check_size function throws value errors
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# when we want it to.
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with self.assertRaises(ValueError):
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Image.new('RGB', 0) # not a tuple
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with self.assertRaises(ValueError):
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Image.new('RGB', (0,)) # Tuple too short
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with self.assertRaises(ValueError):
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Image.new('RGB', (-1, -1)) # w,h < 0
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# this should pass with 0 sized images, #2259
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im = Image.new('L', (0, 0))
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self.assertEqual(im.size, (0, 0))
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self.assertTrue(Image.new('RGB', (1, 1)))
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# Should pass lists too
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i = Image.new('RGB', [1, 1])
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self.assertIsInstance(i.size, tuple)
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def test_storage_neg(self):
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# Storage.c accepted negative values for xsize, ysize. Was
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# test_neg_ppm, but the core function for that has been
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# removed Calling directly into core to test the error in
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# Storage.c, rather than the size check above
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with self.assertRaises(ValueError):
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Image.core.fill('RGB', (2, -2), (0, 0, 0))
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def test_offset_not_implemented(self):
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# Arrange
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im = hopper()
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# Act / Assert
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self.assertRaises(NotImplementedError, lambda: im.offset(None))
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def test_fromstring(self):
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self.assertRaises(NotImplementedError, Image.fromstring)
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def test_linear_gradient_wrong_mode(self):
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# Arrange
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wrong_mode = "RGB"
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# Act / Assert
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self.assertRaises(ValueError,
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lambda: Image.linear_gradient(wrong_mode))
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return
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def test_linear_gradient(self):
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# Arrange
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target_file = "Tests/images/linear_gradient.png"
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for mode in ["L", "P"]:
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# Act
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im = Image.linear_gradient(mode)
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# Assert
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self.assertEqual(im.size, (256, 256))
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self.assertEqual(im.mode, mode)
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self.assertEqual(im.getpixel((0, 0)), 0)
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self.assertEqual(im.getpixel((255, 255)), 255)
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target = Image.open(target_file).convert(mode)
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self.assert_image_equal(im, target)
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def test_radial_gradient_wrong_mode(self):
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# Arrange
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wrong_mode = "RGB"
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# Act / Assert
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self.assertRaises(ValueError,
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lambda: Image.radial_gradient(wrong_mode))
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return
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def test_radial_gradient(self):
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# Arrange
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target_file = "Tests/images/radial_gradient.png"
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for mode in ["L", "P"]:
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# Act
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im = Image.radial_gradient(mode)
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# Assert
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self.assertEqual(im.size, (256, 256))
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self.assertEqual(im.mode, mode)
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self.assertEqual(im.getpixel((0, 0)), 255)
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self.assertEqual(im.getpixel((128, 128)), 0)
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target = Image.open(target_file).convert(mode)
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self.assert_image_equal(im, target)
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class MockEncoder(object):
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pass
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def mock_encode(*args):
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encoder = MockEncoder()
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encoder.args = args
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return encoder
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class TestRegistry(PillowTestCase):
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def test_encode_registry(self):
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Image.register_encoder('MOCK', mock_encode)
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self.assertIn('MOCK', Image.ENCODERS)
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enc = Image._getencoder('RGB', 'MOCK', ('args',), extra=('extra',))
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self.assertIsInstance(enc, MockEncoder)
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self.assertEqual(enc.args, ('RGB', 'args', 'extra'))
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def test_encode_registry_fail(self):
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self.assertRaises(IOError, lambda: Image._getencoder('RGB',
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'DoesNotExist',
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('args',),
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extra=('extra',)))
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if __name__ == '__main__':
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unittest.main()
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