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TestFilePng: Fix test_save_l_transparency()

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It now really tests the file after saving.
This commit is contained in:
Daniel Plakhotich 2018-06-14 12:20:04 +03:00
parent 3b7e563d32
commit 65c7875ff7
1 changed files with 17 additions and 3 deletions
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20
Tests/test_file_png.py
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@ -292,15 +292,29 @@ class TestFilePng(PillowTestCase):
self.assertEqual(im.getcolors(), [(100, (0, 0, 0, 0))])
def test_save_l_transparency(self):
# There are 559 transparent pixels in l_trns.png.
num_transparent = 559
in_file = "Tests/images/l_trns.png"
im = Image.open(in_file)
self.assertEqual(im.mode, "L")
self.assertEqual(im.info["transparency"], 255)
im_rgba = im.convert('RGBA')
self.assertEqual(
im_rgba.getchannel("A").getcolors()[0][0], num_transparent)
test_file = self.tempfile("temp.png")
im.save(test_file)
# There are 559 transparent pixels.
im = im.convert('RGBA')
self.assertEqual(im.getchannel('A').getcolors()[0][0], 559)
test_im = Image.open(test_file)
self.assertEqual(test_im.mode, "L")
self.assertEqual(test_im.info["transparency"], 255)
self.assert_image_equal(im, test_im)
test_im_rgba = test_im.convert('RGBA')
self.assertEqual(
test_im_rgba.getchannel('A').getcolors()[0][0], num_transparent)
def test_save_rgb_single_transparency(self):
in_file = "Tests/images/caption_6_33_22.png"