mirror of
https://github.com/python-pillow/Pillow.git
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266 lines
7.5 KiB
Python
266 lines
7.5 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_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(
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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_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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fp = tempfile.TemporaryFile()
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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_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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# Arrange
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im = hopper()
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# Act
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bands = im.getbands()
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# Assert
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self.assertEqual(bands, ('R', 'G', 'B'))
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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.assertTrue(im1 != im2)
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def test_alpha_composite(self):
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# http://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_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 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', (0,0)) # w,h <= 0
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self.assertTrue(Image.new('RGB', (1,1)))
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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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if __name__ == '__main__':
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unittest.main()
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