[3.9] bpo-19460: Add test for MIMENonMultipart (GH-29817) (#29819)

miss-islington · 180909 · asvetlov · web-flow · commit 209cec8a2a2e · 2021-11-28T16:33:50.000+02:00
* bpo-19460: Add test for MIMENonMultipart (GH-29817) (cherry picked from commit 46c8d91) Co-authored-by: 180909 <wjh180909@gmail.com> * Update 2021-11-28-15-25-02.bpo-19460.lr0aWs.rst Co-authored-by: 180909 <wjh180909@gmail.com> Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
@@ -2742,6 +2742,20 @@ def test_multipart_custom_policy(self):
         self.assertEqual(str(cm.exception),
                          'There may be at most 1 To headers in a message')
 
+
+# Test the NonMultipart class
+class TestNonMultipart(TestEmailBase):
+    def test_nonmultipart_is_not_multipart(self):
+        msg = MIMENonMultipart('text', 'plain')
+        self.assertFalse(msg.is_multipart())
+
+    def test_attach_raises_exception(self):
+        msg = Message()
+        msg['Subject'] = 'subpart 1'
+        r = MIMENonMultipart('text', 'plain')
+        self.assertRaises(errors.MultipartConversionError, r.attach, msg)
+
+
 # A general test of parser->model->generator idempotency.  IOW, read a message
 # in, parse it into a message object tree, then without touching the tree,
 # regenerate the plain text.  The original text and the transformed text
diff --git a/Misc/NEWS.d/next/Tests/2021-11-28-15-25-02.bpo-19460.lr0aWs.rst b/Misc/NEWS.d/next/Tests/2021-11-28-15-25-02.bpo-19460.lr0aWs.rst
@@ -0,0 +1 @@
+Add new Test for :class:`email.mime.nonmultipart.MIMENonMultipart`.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Add new Test for :class:`email.mime.nonmultipart.MIMENonMultipart`.