Pillow/Tests/test_file_dcx.py
2017-09-30 13:33:06 +10:00

65 lines
1.6 KiB
Python

from helper import unittest, PillowTestCase, hopper
from PIL import Image, DcxImagePlugin
# Created with ImageMagick: convert hopper.ppm hopper.dcx
TEST_FILE = "Tests/images/hopper.dcx"
class TestFileDcx(PillowTestCase):
def test_sanity(self):
# Arrange
# Act
im = Image.open(TEST_FILE)
# Assert
self.assertEqual(im.size, (128, 128))
self.assertIsInstance(im, DcxImagePlugin.DcxImageFile)
orig = hopper()
self.assert_image_equal(im, orig)
def test_invalid_file(self):
with open("Tests/images/flower.jpg", "rb") as fp:
self.assertRaises(SyntaxError,
DcxImagePlugin.DcxImageFile, fp)
def test_tell(self):
# Arrange
im = Image.open(TEST_FILE)
# Act
frame = im.tell()
# Assert
self.assertEqual(frame, 0)
def test_n_frames(self):
im = Image.open(TEST_FILE)
self.assertEqual(im.n_frames, 1)
self.assertFalse(im.is_animated)
def test_eoferror(self):
im = Image.open(TEST_FILE)
n_frames = im.n_frames
# Test seeking past the last frame
self.assertRaises(EOFError, im.seek, n_frames)
self.assertLess(im.tell(), n_frames)
# Test that seeking to the last frame does not raise an error
im.seek(n_frames-1)
def test_seek_too_far(self):
# Arrange
im = Image.open(TEST_FILE)
frame = 999 # too big on purpose
# Act / Assert
self.assertRaises(EOFError, im.seek, frame)
if __name__ == '__main__':
unittest.main()