fix #246 (#273)

* Bump coverage from 7.2.3 to 7.3.0

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.2.3 to 7.3.0.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.2.3...7.3.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix #246

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -3,7 +3,7 @@ updates:
 - package-ecosystem: pip
   directory: "/"
   schedule:
-    interval: daily
+    interval: monthly
   open-pull-requests-limit: 10
   ignore:
   - dependency-name: pytest-asyncio

async_sender/api.py

@@ -194,11 +194,12 @@ def as_string(self) -> str:
             alternative.attach(MIMEText(self.html, "html", self.charset))
             msg.attach(alternative)
 
-        msg["Subject"] = Header(self.subject, self.charset)
         # For improve deliver-ability
         # https://github.com/theruziev/async_sender/issues/228
         if self.subject is not None and self.subject.isascii():
             msg["Subject"] = Header(self.subject, USASCII)
+        else:
+            msg["Subject"] = Header(self.subject, self.charset)
 
         msg["From"] = self.from_address
         msg["To"] = ", ".join(self.to)

tests/test_async_sender.py

@@ -99,6 +99,11 @@ def test_extra_headers():
     )
     assert "Extra-Header-Test: Test" in str(msg)
 
+def test_message_subject_charset():
+    msg = Message(subject="hello world")
+    assert "hello world" in msg.as_string()
+    msg_utf8_subject = Message(subject="Привет мир")
+    assert "=?utf-8?b?0J/RgNC40LLQtdGCINC80LjRgA==?=" in msg_utf8_subject.as_string()
 
 def test_mail_and_rcpt_options():
     msg = Message()