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Viewing changes to bzrlib/tests/blackbox/test_branch.py

(vila) Backport fix for a random test failure (Vincent Ladeuil)

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bzrlib/tests/blackbox/test_branch.py
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    def test_branch_broken_pack(self):
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        """branching with a corrupted pack file."""
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        self.example_branch('a')
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        #now add some random corruption
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        fname = 'a/.bzr/repository/packs/' + os.listdir('a/.bzr/repository/packs')[0]
 
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        # add some corruption
 
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        packs_dir = 'a/.bzr/repository/packs/'
 
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        fname = packs_dir + os.listdir(packs_dir)[0]
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        with open(fname, 'rb+') as f:
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            f.seek(750)
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            f.write("\xff")
 
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            # Start from the end of the file to avoid choosing a place bigger
 
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            # than the file itself.
 
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            f.seek(-5, os.SEEK_END)
 
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            c = f.read(1)
 
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            f.seek(-5, os.SEEK_END)
 
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            # Make sure we inject a value different than the one we just read
 
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            if c == '\xFF':
 
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                corrupt = '\x00'
 
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            else:
 
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                corrupt = '\xFF'
 
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            f.write(corrupt) # make sure we corrupt something
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        self.run_bzr_error(['Corruption while decompressing repository file'], 
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                            'branch a b', retcode=3)
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