urllib: Add tests for HTTP errors to complete coverage (#154102)

https://github.com/python/cpython/commit/b8ec956716c183430a93929e6415ceed74089af1
commit: b8ec956716c183430a93929e6415ceed74089af1
branch: main
author: Ajob Kustra <[email protected]>
committer: tomasr8 <[email protected]>
date: 2026-07-19T12:29:17Z
summary:

urllib: Add tests for HTTP errors to complete coverage (#154102)

* add test for httperror props such as reason and fp, and stringified urlerror test

* rm unnecessary 'reason' attr test, change url to filename and add reason and headers attr

* separate file pointer test

* prevent resource warning, close httperror exception

* exc > err

files:
M Lib/test/test_urllib.py

diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index 2dd739b77b8e4d..1e5f79998e7cab 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -467,6 +467,25 @@ def test_redirect_limit_independent(self):
             finally:
                 self.unfakehttp()
 
+    def test_http_error_attribute_values(self):
+        hdrs = {
+            "Authorization": "Bearer foobar",
+            "Accept": "application/json"
+        }
+        err = urllib.error.HTTPError("http://something", 404, "foo", hdrs, None)
+        self.assertEqual(err.filename, "http://something")
+        self.assertEqual(err.code, 404)
+        self.assertEqual(err.msg, "foo")
+        self.assertEqual(err.reason, "foo")
+        self.assertEqual(err.hdrs, hdrs)
+        self.assertEqual(err.headers, hdrs)
+        err.close()
+
+    def test_http_error_default_fp(self):
+        err = urllib.error.HTTPError("http://something", 404, "foo", {}, None)
+        self.assertIsInstance(err.fp, io.BytesIO)
+        err.close()
+
     def test_empty_socket(self):
         # urlopen() raises OSError if the underlying socket does not send any
         # data. (#1680230)
@@ -513,6 +532,11 @@ def test_ftp_nonexisting(self):
         self.assertFalse(e.exception.filename)
         self.assertTrue(e.exception.reason)
 
+    def test_url_error_stringified(self):
+        reason = 'sixseven'
+        err = urllib.error.URLError(reason)
+        self.assertEqual(str(err), f'<urlopen error {reason}>')
+
 
 class urlopen_DataTests(unittest.TestCase):
     """Test urlopen() opening a data URL."""

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