fix(projekt-matching): store outgoing mail copies in Sent via IMAP append

projekt-matching/tests/test_mailer.py

@@ -1,4 +1,5 @@
 import email
+from email.message import EmailMessage
 
 import pytest
 from unittest import mock
@@ -62,7 +63,8 @@ def test_fetch_raises_on_malformed_ok_response():
 
 
 def test_send_mail_starttls():
-    with mock.patch("projektmatch.mailer.smtplib.SMTP") as smtp:
+    with mock.patch("projektmatch.mailer.smtplib.SMTP") as smtp, \
+            mock.patch("projektmatch.mailer.append_sent") as append_sent:
         server = smtp.return_value.__enter__.return_value
         mailer.send_mail("u@x", "pw", "to@x", "Subj", "Body")
     server.starttls.assert_called_once()
@@ -71,3 +73,30 @@ def test_send_mail_starttls():
     assert msg["Subject"] == "Subj" and msg["To"] == "to@x"
     assert msg["Date"]
     assert msg["Message-ID"].endswith("@destengs.com>")
+    append_sent.assert_called_once_with("u@x", "pw", msg)
+
+
+def test_send_mail_survives_append_failure():
+    with mock.patch("projektmatch.mailer.smtplib.SMTP") as smtp, \
+            mock.patch("projektmatch.mailer.append_sent",
+                        side_effect=OSError("imap down")):
+        mailer.send_mail("u@x", "pw", "to@x", "Subj", "Body")
+
+
+def test_append_sent_uses_special_use_folder():
+    conn = mock.Mock()
+    conn.list.return_value = ("OK", [
+        b'(\\HasNoChildren) "." "INBOX"',
+        b'(\\HasNoChildren \\Sent) "." "Sent"'])
+    msg = EmailMessage()
+    msg["Subject"] = "Subj"
+    msg.set_content("Body")
+
+    mailer.append_sent("u@x", "pw", msg, conn=conn)
+
+    args = conn.append.call_args.args
+    assert args[0] == "Sent"
+    assert "\\Seen" in args[1]
+    assert args[3] == msg.as_bytes()
+    conn.login.assert_not_called()
+    conn.logout.assert_not_called()