Issue #23439: Add missing entries to http.client.__all__.

Also, document the LineTooLong exception since it can be raised by
the members of public API (e.g. http.client.HTTPResponse).

Patch by Martin Panter.

1 files changed, 15 insertions, 0 deletions

diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
index 40ef250..088bf73 100644
--- a/Lib/test/test_httplib.py
+++ b/Lib/test/test_httplib.py
@@ -920,7 +920,22 @@ class Readliner:
             self.remainder = b"".join(data)
             raise
 
+
 class OfflineTest(TestCase):
+    def test_all(self):
+        # Documented objects defined in the module should be in __all__
+        expected = {"responses"}  # White-list documented dict() object
+        # HTTPMessage, parse_headers(), and the HTTP status code constants are
+        # intentionally omitted for simplicity
+        blacklist = {"HTTPMessage", "parse_headers"}
+        for name in dir(client):
+            if name in blacklist:
+                continue
+            module_object = getattr(client, name)
+            if getattr(module_object, "__module__", None) == "http.client":
+                expected.add(name)
+        self.assertCountEqual(client.__all__, expected)
+
     def test_responses(self):
         self.assertEqual(client.responses[client.NOT_FOUND], "Not Found")