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Diffstat (limited to 'Lib/test/test_io.py')
| -rw-r--r-- | Lib/test/test_io.py | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py index 1cf0527..57b22c6 100644 --- a/Lib/test/test_io.py +++ b/Lib/test/test_io.py @@ -2542,6 +2542,30 @@ class TextIOWrapperTest(unittest.TestCase): txt.write('5') self.assertEqual(b''.join(raw._write_stack), b'123\n45') + def test_read_nonbytes(self): + # Issue #17106 + # Crash when underlying read() returns non-bytes + t = self.TextIOWrapper(self.StringIO('a')) + self.assertRaises(TypeError, t.read, 1) + t = self.TextIOWrapper(self.StringIO('a')) + self.assertRaises(TypeError, t.readline) + t = self.TextIOWrapper(self.StringIO('a')) + self.assertRaises(TypeError, t.read) + + def test_illegal_decoder(self): + # Issue #17106 + # Crash when decoder returns non-string + t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n', + encoding='quopri_codec') + self.assertRaises(TypeError, t.read, 1) + t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n', + encoding='quopri_codec') + self.assertRaises(TypeError, t.readline) + t = self.TextIOWrapper(self.BytesIO(b'aaaaaa'), newline='\n', + encoding='quopri_codec') + self.assertRaises(TypeError, t.read) + + class CTextIOWrapperTest(TextIOWrapperTest): def test_initialization(self): |