Pillow/Tests/test_image_tobitmap.py

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from .helper import unittest, PillowTestCase, hopper, fromstring
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class TestImageToBitmap(PillowTestCase):
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def test_sanity(self):
self.assertRaises(ValueError, lambda: hopper().tobitmap())
im1 = hopper().convert("1")
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bitmap = im1.tobitmap()
self.assertIsInstance(bitmap, bytes)
self.assert_image_equal(im1, fromstring(bitmap))
if __name__ == '__main__':
unittest.main()