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Add type assertion to the cache lookup #123

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Merged
merged 1 commit into from
Aug 15, 2022
Merged

Add type assertion to the cache lookup #123

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8 changes: 8 additions & 0 deletions 8 ua_parser/user_agent_parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@

import os
import re
import sys
import warnings

__author__ = "Lindsey Simon <elsigh@gmail.com>"
Expand Down Expand Up @@ -218,8 +219,15 @@ def Parse(self, user_agent_string):
MAX_CACHE_SIZE = 200
_PARSE_CACHE = {}

_UA_TYPES = str
if sys.version_info < (3,):
_UA_TYPES = (str, unicode)


def _lookup(ua, args):
if not isinstance(ua, _UA_TYPES):
raise TypeError("Expected user agent to be a string, got %r" % ua)
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shouldn't that be type(ua) at the end?

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Shouldn't really matter, this prints the value which I assumed would be more relevant / understandable.


key = (ua, tuple(sorted(args.items())))
entry = _PARSE_CACHE.get(key)
if entry is not None:
Expand Down
22 changes: 22 additions & 0 deletions 22 ua_parser/user_agent_parser_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
import os
import platform
import re
import sys
import unittest
import warnings
import yaml
Expand Down Expand Up @@ -301,5 +302,26 @@ def test_js_bits_deprecation(self):
self.assertEqual(w.category, DeprecationWarning)


class ErrTest(unittest.TestCase):
@unittest.skipIf(
sys.version_info < (3,), "bytes and str are not differentiated in P2"
)
def test_bytes(self):
with self.assertRaises(TypeError):
user_agent_parser.Parse(b"")

def test_int(self):
with self.assertRaises(TypeError):
user_agent_parser.Parse(0)

def test_list(self):
with self.assertRaises(TypeError):
user_agent_parser.Parse([])

def test_tuple(self):
with self.assertRaises(TypeError):
user_agent_parser.Parse(())


if __name__ == "__main__":
unittest.main()
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