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added test for metadata count warning

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This commit is contained in:
Eric Soroos 2017-09-19 10:35:14 +00:00
parent 3d22e52a37
commit c12b9fb4dc
1 changed files with 13 additions and 0 deletions
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13
Tests/test_file_tiff_metadata.py
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@ -239,5 +239,18 @@ class TestFileTiffMetadata(PillowTestCase):
reloaded = Image.open(out)
self.assertIsInstance(reloaded.tag_v2[34377], bytes)
def test_too_many_entries(self):
ifd = TiffImagePlugin.ImageFileDirectory_v2()
# 277: ("SamplesPerPixel", SHORT, 1),
ifd._tagdata[277] = struct.pack('hh', 4,4)
ifd.tagtype[277] = TiffTags.SHORT
try:
self.assert_warning(UserWarning, lambda: ifd[277])
except ValueError:
self.fail("Invalid Metadata count should not cause a Value Error.")
if __name__ == '__main__':
unittest.main()