Pillow/Tests/test_file_im.py

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from helper import unittest, PillowTestCase, hopper
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from PIL import Image, ImImagePlugin
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# sample im
TEST_IM = "Tests/images/hopper.im"
class TestFileIm(PillowTestCase):
def test_sanity(self):
im = Image.open(TEST_IM)
im.load()
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.format, "IM")
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def test_tell(self):
# Arrange
im = Image.open(TEST_IM)
# Act
frame = im.tell()
# Assert
self.assertEqual(frame, 0)
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def test_n_frames(self):
im = Image.open(TEST_IM)
self.assertEqual(im.n_frames, 1)
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self.assertFalse(im.is_animated)
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def test_eoferror(self):
im = Image.open(TEST_IM)
n_frames = im.n_frames
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# 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)
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def test_roundtrip(self):
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for mode in ["RGB", "P"]:
out = self.tempfile('temp.im')
im = hopper(mode)
im.save(out)
reread = Image.open(out)
self.assert_image_equal(reread, im)
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def test_save_unsupported_mode(self):
out = self.tempfile('temp.im')
im = hopper("HSV")
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self.assertRaises(ValueError, im.save, out)
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def test_invalid_file(self):
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invalid_file = "Tests/images/flower.jpg"
self.assertRaises(SyntaxError,
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ImImagePlugin.ImImageFile, invalid_file)
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def test_number(self):
self.assertEqual(1.2, ImImagePlugin.number("1.2"))
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if __name__ == '__main__':
unittest.main()