tests: Added SMTP graceful authentication cancellation tests

tests/data/test934

@@ -0,0 +1,53 @@
+<testcase>
+<info>
+<keywords>
+SMTP
+SMTP AUTH DIGEST-MD5
+RFC2831
+RFC4954
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+AUTH DIGEST-MD5
+REPLY AUTH 334 Rubbish
+REPLY * 501 AUTH exchange cancelled by client
+</servercmd>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+smtp
+</server>
+<features>
+debug
+crypto
+</features>
+ <name>
+SMTP DIGEST-MD5 graceful cancellation
+ </name>
+ <command>
+smtp://%HOSTIP:%SMTPPORT/934 --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret -T -
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 67 - CURLE_LOGIN_DENIED
+<errorcode>
+67
+</errorcode>
+<protocol>
+EHLO 934
+AUTH DIGEST-MD5
+*
+QUIT
+</protocol>
+</verify>
+</testcase>