BUG#29115406: CONTRIBUTION - FIX RECV COMPRESS BUG

When switching to compressed mode while using the pure python
implementation, there is a bug where a compressed packet may
contain an incomplete MySQL packet at last.

The bug report does not say much about the issue and does
not even provide a test case that proves it, however,
we managed to find the bug the contributor means while
developing the WL#15591 (improve the network module) where
the low-level network communication code was refactored.

This patch updates the test case previously implemented
in WL#15591 to check the issue so that the test payload
sizes do not surpass the default configuration of
`max_allowed_packet` for a common MySQL server setup.

Thanks, Allen Long for the contribution.

Change-Id: I99a90538553b49aa7c0737c7999cbe5b281d5fd3

Author: oscpache

CHANGES.txt

@@ -19,6 +19,7 @@ v8.1.0
 - BUG#35338384: PIP installs incompatible Connector/Python packages
 - BUG#35318413: Fix charset mapping for MySQL 8.1.0
 - BUG#35212199: Check for identifier quotes in the database name
+- BUG#29115406: CONTRIBUTION - FIX RECV COMPRESS BUG
 
 v8.0.33
 =======

tests/test_bugs.py

@@ -7478,7 +7478,7 @@ def compressed_packet_incomplete_at_last(self):
         input_sizes = [
             network.MAX_PAYLOAD_LENGTH - 303,
             (network.MAX_PAYLOAD_LENGTH * 2) + 2,
-            network.MAX_PAYLOAD_LENGTH * 10,
+            network.MAX_PAYLOAD_LENGTH * 3,
         ]
         with self.cnx.cursor() as cur:
             for input_size in input_sizes: