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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import unittest
from PIL import Image
import image_tools
def _GenImage(size, color):
return Image.new('RGB', size, color)
def _AllPixelsOfColor(image, color):
return not any(px != color for px in image.getdata())
class ImageToolsTest(unittest.TestCase):
def testAreTheSameSize(self):
black25x25 = _GenImage((25, 25), (0, 0, 0))
white25x25 = _GenImage((25, 25), (255, 255, 255))
black50x50 = _GenImage((50, 50), (0, 0, 0))
white50x50 = _GenImage((50, 50), (255, 255, 255))
self.assertTrue(image_tools._AreTheSameSize([black25x25, black25x25]))
self.assertTrue(image_tools._AreTheSameSize([white25x25, white25x25]))
self.assertTrue(image_tools._AreTheSameSize([black50x50, black50x50]))
self.assertTrue(image_tools._AreTheSameSize([white50x50, white50x50]))
self.assertTrue(image_tools._AreTheSameSize([black25x25, white25x25]))
self.assertTrue(image_tools._AreTheSameSize([black50x50, white50x50]))
self.assertFalse(image_tools._AreTheSameSize([black50x50, black25x25]))
self.assertFalse(image_tools._AreTheSameSize([white50x50, white25x25]))
self.assertFalse(image_tools._AreTheSameSize([black25x25, white50x50]))
self.assertFalse(image_tools._AreTheSameSize([black50x50, white25x25]))
self.assertRaises(Exception, image_tools._AreTheSameSize, [])
self.assertRaises(Exception, image_tools._AreTheSameSize, [black50x50])
def testGetDifferenceWithMask(self):
black25x25 = _GenImage((25, 25), (0, 0, 0))
white25x25 = _GenImage((25, 25), (255, 255, 255))
black50x50 = _GenImage((50, 50), (0, 0, 0))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, black25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
white25x25, white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
white25x25, black25x25), (255, 255, 255)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, black25x25, mask=black25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, black25x25, mask=white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, white25x25, mask=black25x25), (255, 255, 255)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, white25x25, mask=white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
black25x25, white25x25, different_color=(255, 0, 0)), (255, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
white25x25, white25x25, same_color=(255, 0, 0)), (255, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools._GetDifferenceWithMask(
white25x25, white25x25,
mask=white25x25, masked_color=(255, 0, 0)), (255, 0, 0)))
self.assertRaises(Exception, image_tools._GetDifferenceWithMask,
white25x25,
black50x50)
self.assertRaises(Exception, image_tools._GetDifferenceWithMask,
white25x25,
white25x25,
mask=black50x50)
def testCreateMask(self):
black25x25 = _GenImage((25, 25), (0, 0, 0))
white25x25 = _GenImage((25, 25), (255, 255, 255))
m1 = image_tools.CreateMask([black25x25, white25x25])
self.assertTrue(_AllPixelsOfColor(m1, (255, 255, 255)))
m2 = image_tools.CreateMask([black25x25, black25x25])
self.assertTrue(_AllPixelsOfColor(m2, (0, 0, 0)))
m3 = image_tools.CreateMask([white25x25, white25x25])
self.assertTrue(_AllPixelsOfColor(m3, (0, 0, 0)))
def testTotalDifferentPixels(self):
white25x25 = _GenImage((25, 25), (255, 255, 255))
white50x50 = _GenImage((50, 50), (255, 255, 255))
black25x25 = _GenImage((25, 25), (0, 0, 0))
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
white25x25),
0)
self.assertEquals(image_tools.TotalDifferentPixels(black25x25,
black25x25),
0)
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
black25x25),
25*25)
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
black25x25,
mask=white25x25),
0)
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
white25x25,
mask=white25x25),
0)
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
black25x25,
mask=black25x25),
25*25)
self.assertEquals(image_tools.TotalDifferentPixels(white25x25,
white25x25,
mask=black25x25),
0)
self.assertRaises(Exception, image_tools.TotalDifferentPixels,
white25x25, white50x50)
self.assertRaises(Exception, image_tools.TotalDifferentPixels,
white25x25, white25x25, mask=white50x50)
def testSameImage(self):
white25x25 = _GenImage((25, 25), (255, 255, 255))
black25x25 = _GenImage((25, 25), (0, 0, 0))
white50x50 = _GenImage((50, 50), (255, 255, 255))
self.assertTrue(image_tools.SameImage(white25x25, white25x25))
self.assertFalse(image_tools.SameImage(white25x25, black25x25))
self.assertTrue(image_tools.SameImage(white25x25, black25x25,
mask=white25x25))
self.assertFalse(image_tools.SameImage(white25x25, black25x25,
mask=black25x25))
self.assertTrue(image_tools.SameImage(black25x25, black25x25))
self.assertTrue(image_tools.SameImage(black25x25, black25x25,
mask=white25x25))
self.assertTrue(image_tools.SameImage(white25x25, white25x25,
mask=white25x25))
self.assertRaises(Exception, image_tools.SameImage,
white25x25, white50x50)
self.assertRaises(Exception, image_tools.SameImage,
white25x25, white25x25,
mask=white50x50)
def testVisualizeImageDifferences(self):
white25x25 = _GenImage((25, 25), (255, 255, 255))
black25x25 = _GenImage((25, 25), (0, 0, 0))
white50x50 = _GenImage((50, 50), (255, 255, 255))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, black25x25), (255, 255, 255)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
black25x25, black25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, black25x25, mask=white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, black25x25, mask=black25x25), (255, 255, 255)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, white25x25, mask=white25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
white25x25, white25x25, mask=black25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
black25x25, black25x25, mask=black25x25), (0, 0, 0)))
self.assertTrue(_AllPixelsOfColor(image_tools.VisualizeImageDifferences(
black25x25, black25x25, mask=white25x25), (0, 0, 0)))
self.assertRaises(Exception,
image_tools.VisualizeImageDifferences,
white25x25,
white50x50)
self.assertRaises(Exception,
image_tools.VisualizeImageDifferences,
white25x25,
black25x25,
mask=white50x50)
def testSerialization(self):
black25x25 = _GenImage((25, 25), (0, 0, 0))
white25x25 = _GenImage((25, 25), (255, 255, 255))
self.assertTrue(_AllPixelsOfColor(
image_tools.DeserializeImage(
image_tools.SerializeImage(white25x25)), (255, 255, 255)))
self.assertTrue(_AllPixelsOfColor(
image_tools.DeserializeImage(
image_tools.SerializeImage(black25x25)), (0, 0, 0)))
if __name__ == '__main__':
unittest.main()
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