[Python-checkins] cpython (2.7): #15036: Make a repeated changes and flushes work with single-file mailboxes

[petri.lehtinen]

http://hg.python.org/cpython/rev/0add70dd3c43
changeset:   77443:0add70dd3c43
branch:      2.7
parent:      77441:0ac1f90954dc
user:        Petri Lehtinen <petri at digip.org>
date:        Fri Jun 15 20:50:51 2012 +0300
summary:
  #15036: Make a repeated changes and flushes work with single-file mailboxes

files:
  Lib/mailbox.py           |   1 +
  Lib/test/test_mailbox.py |  11 +++++++++++
  Misc/NEWS                |   4 ++++
  3 files changed, 16 insertions(+), 0 deletions(-)


diff --git a/Lib/mailbox.py b/Lib/mailbox.py
--- a/Lib/mailbox.py
+++ b/Lib/mailbox.py
@@ -649,6 +649,7 @@
                     new_file.write(buffer)
                 new_toc[key] = (new_start, new_file.tell())
                 self._post_message_hook(new_file)
+            self._file_length = new_file.tell()
         except:
             new_file.close()
             os.remove(new_file.name)
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py
--- a/Lib/test/test_mailbox.py
+++ b/Lib/test/test_mailbox.py
@@ -386,6 +386,17 @@
         # Write changes to disk
         self._test_flush_or_close(self._box.flush, True)
 
+    def test_popitem_and_flush_twice(self):
+        # See #15036.
+        self._box.add(self._template % 0)
+        self._box.add(self._template % 1)
+        self._box.flush()
+
+        self._box.popitem()
+        self._box.flush()
+        self._box.popitem()
+        self._box.flush()
+
     def test_lock_unlock(self):
         # Lock and unlock the mailbox
         self.assertFalse(os.path.exists(self._get_lock_path()))
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -67,6 +67,10 @@
 Library
 -------
 
+- Issue #15036: Allow removing or changing multiple items in
+  single-file mailboxes (mbox, MMDF, Babyl) flushing the mailbox
+  between the changes.
+
 - Issue #10133: Make multiprocessing deallocate buffer if socket read
   fails.  Patch by Hallvard B Furuseth.
 

-- 
Repository URL: http://hg.python.org/cpython