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85 lines
2.2 KiB
Python
85 lines
2.2 KiB
Python
import unittest
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import pytest
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from PIL import DcxImagePlugin, Image
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from .helper import PillowTestCase, assert_image_equal, hopper, is_pypy
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# Created with ImageMagick: convert hopper.ppm hopper.dcx
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TEST_FILE = "Tests/images/hopper.dcx"
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class TestFileDcx(PillowTestCase):
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def test_sanity(self):
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# Arrange
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# Act
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with Image.open(TEST_FILE) as im:
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# Assert
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self.assertEqual(im.size, (128, 128))
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self.assertIsInstance(im, DcxImagePlugin.DcxImageFile)
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orig = hopper()
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assert_image_equal(im, orig)
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@unittest.skipIf(is_pypy(), "Requires CPython")
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def test_unclosed_file(self):
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def open():
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im = Image.open(TEST_FILE)
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im.load()
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pytest.warns(ResourceWarning, open)
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def test_closed_file(self):
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def open():
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im = Image.open(TEST_FILE)
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im.load()
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im.close()
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pytest.warns(None, open)
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def test_context_manager(self):
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def open():
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with Image.open(TEST_FILE) as im:
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im.load()
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pytest.warns(None, open)
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def test_invalid_file(self):
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with open("Tests/images/flower.jpg", "rb") as fp:
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self.assertRaises(SyntaxError, DcxImagePlugin.DcxImageFile, fp)
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def test_tell(self):
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# Arrange
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with Image.open(TEST_FILE) as im:
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# Act
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frame = im.tell()
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# Assert
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self.assertEqual(frame, 0)
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def test_n_frames(self):
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with Image.open(TEST_FILE) as im:
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self.assertEqual(im.n_frames, 1)
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self.assertFalse(im.is_animated)
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def test_eoferror(self):
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with Image.open(TEST_FILE) as im:
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n_frames = im.n_frames
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# Test seeking past the last frame
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self.assertRaises(EOFError, im.seek, n_frames)
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self.assertLess(im.tell(), n_frames)
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# Test that seeking to the last frame does not raise an error
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im.seek(n_frames - 1)
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def test_seek_too_far(self):
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# Arrange
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with Image.open(TEST_FILE) as im:
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frame = 999 # too big on purpose
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# Act / Assert
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self.assertRaises(EOFError, im.seek, frame)
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