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Diffstat (limited to 'Lib/test/test_gzip.py')
| -rw-r--r-- | Lib/test/test_gzip.py | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py index af73953f68..ebd4c43855 100644 --- a/Lib/test/test_gzip.py +++ b/Lib/test/test_gzip.py @@ -389,6 +389,20 @@ class TestGzip(BaseTest): datac = gzip.compress(data) self.assertEqual(gzip.decompress(datac), data) + def test_read_truncated(self): + data = data1*50 + # Drop the CRC (4 bytes) and file size (4 bytes). + truncated = gzip.compress(data)[:-8] + with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f: + self.assertRaises(EOFError, f.read) + with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f: + self.assertEqual(f.read(len(data)), data) + self.assertRaises(EOFError, f.read, 1) + # Incomplete 10-byte header. + for i in range(2, 10): + with gzip.GzipFile(fileobj=io.BytesIO(truncated[:i])) as f: + self.assertRaises(EOFError, f.read, 1) + class TestOpen(BaseTest): def test_binary_modes(self): |