Pillow/Tests/test_file_dcx.py
Jon Dufresne 4de5477b61 Remove unnecessary unittest.main() boilerplate from test files
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:

    if __name__ == '__main__':
        unittest.main()

To every test file. It is simply noise.

The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
2019-02-03 10:10:16 -08:00

67 lines
1.7 KiB
Python

from .helper import 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_unclosed_file(self):
def open():
im = Image.open(TEST_FILE)
im.load()
self.assert_warning(None, open)
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)