test_zipfile.py 文件源码

def test_append_to_non_zip_file(self):
        """Test appending to an existing file that is not a zipfile."""
        # NOTE: this test fails if len(d) < 22 because of the first
        # line "fpin.seek(-22, 2)" in _EndRecData
        data = 'I am not a ZipFile!'*10
        with open(TESTFN2, 'wb') as f:
            f.write(data)

        with zipfile.ZipFile(TESTFN2, "a", zipfile.ZIP_STORED) as zipfp:
            zipfp.write(TESTFN, TESTFN)

        with open(TESTFN2, 'rb') as f:
            f.seek(len(data))
            with zipfile.ZipFile(f, "r") as zipfp:
                self.assertEqual(zipfp.namelist(), [TESTFN])
                self.assertEqual(zipfp.read(TESTFN), self.data)
        with open(TESTFN2, 'rb') as f:
            self.assertEqual(f.read(len(data)), data)
            zipfiledata = f.read()
        with io.BytesIO(zipfiledata) as bio, zipfile.ZipFile(bio) as zipfp:
            self.assertEqual(zipfp.namelist(), [TESTFN])
            self.assertEqual(zipfp.read(TESTFN), self.data)