Clean code of send_test_email command.

* Derive from sendtestemail command of Django.
* Remove unwanted imported.
* Allow test email to admin and managers.

zerver/management/commands/send_test_email.py

@@ -2,25 +2,22 @@
 
 from typing import Any
 
-from argparse import ArgumentParser
-from django.core.management.base import BaseCommand, CommandError
 from django.conf import settings
-from django.core.mail import send_mail, BadHeaderError
+from django.core.mail import mail_admins, mail_managers, send_mail
+from django.core.management.commands import sendtestemail
 
-class Command(BaseCommand):
-    help = """Send email to specified email address."""
-
-    def add_arguments(self, parser):
-        # type: (ArgumentParser) -> None
-        parser.add_argument('to', metavar='<to>', type=str,
-                            help="email of user to send the email")
-
-    def handle(self, *args, **options):
+class Command(sendtestemail.Command):
+    def handle(self, *args, **kwargs):
         # type: (*Any, **str) -> None
         subject = "Zulip Test email"
-        message = "Success!  If you receive this message, you've successfully " + \
-            "configured sending email from your Zulip server."
+        message = ("Success!  If you receive this message, you've "
+                   "successfully configured sending email from your "
+                   "Zulip server.")
         sender = settings.DEFAULT_FROM_EMAIL
-        to = options['to']
+        send_mail(subject, message, sender, kwargs['email'])
+
+        if kwargs['managers']:
+            mail_managers(subject, "This email was sent to the site managers.")
 
-        send_mail(subject, message, sender, [to])
+        if kwargs['admins']:
+            mail_admins(subject, "This email was sent to the site admins.")