gh-143916: Reject control characters in wsgiref.headers.Headers #143917
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webknjaz
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Jan 16, 2026
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| self.assertRaises(ValueError, headers.__setitem__, f"key{c0}", "val") | ||
| self.assertRaises(ValueError, headers.__setitem__, "key", f"val{c0}") | ||
| self.assertRaises(ValueError, headers.add_header, f"key{c0}", "val", param="param") | ||
| self.assertRaises(ValueError, headers.add_header, "key", f"val{c0}", param="param") | ||
| self.assertRaises(ValueError, headers.add_header, "key", "val", param=f"param{c0}") |
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Consider marking params as subtests for better test report.
Suggested change
| self.assertRaises(ValueError, headers.__setitem__, f"key{c0}", "val") | |
| self.assertRaises(ValueError, headers.__setitem__, "key", f"val{c0}") | |
| self.assertRaises(ValueError, headers.add_header, f"key{c0}", "val", param="param") | |
| self.assertRaises(ValueError, headers.add_header, "key", f"val{c0}", param="param") | |
| self.assertRaises(ValueError, headers.add_header, "key", "val", param=f"param{c0}") | |
| with self.subTest(control_character=hex(ord(c0[0]))): | |
| self.assertRaises(ValueError, headers.__setitem__, f"key{c0}", "val") | |
| self.assertRaises(ValueError, headers.__setitem__, "key", f"val{c0}") | |
| self.assertRaises(ValueError, headers.add_header, f"key{c0}", "val", param="param") | |
| self.assertRaises(ValueError, headers.add_header, "key", f"val{c0}", param="param") | |
| self.assertRaises(ValueError, headers.add_header, "key", "val", param=f"param{c0}") |
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Are you okay if I don't adopt subTest() here? I ask because I have many other PRs out that I'd need to modify, too.
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Sure, I won't insist. It's just that I usually try to make logical tests obvious. It's typically easier in newly added lines rather than when refactoring existing tests.
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