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

* bpo-19460: Add test for MIMENonMultipart (GH-29817)
(cherry picked from commit 46c8d915715aa2bd4d697482aa051fe974d440e1)

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
index bc062b5cb0c5910ce1fe9676644ea6418346cd32..489cd05be4dd5823953ab3d9ec2520910f15eaf3 100644 (file)
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -2742,6 +2742,20 @@ message 2
         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
new file mode 100644 (file)
index 0000000..b082d6d
--- /dev/null
+++ 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`.