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-rw-r--r--tests/piem-tests.el18
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/piem-tests.el b/tests/piem-tests.el
index 79d8591..6f39a53 100644
--- a/tests/piem-tests.el
+++ b/tests/piem-tests.el
@@ -179,6 +179,24 @@
(should-not
(with-temp-buffer
(piem--insert-message-id-header "msg@id")))
+ (should-not
+ (string-match-p
+ "Message-Id: <msg@id>"
+ (with-temp-buffer
+ (insert "\
+From 0d732713af1f3fb48b37430e2cd0a3033cea14f3 Mon Sep 17 00:00:00 2001
+From: Foo Bar <f@example.com>
+Message-ID: <existing@id>
+Date: Fri, 22 Jan 2021 22:35:58 -0500
+Subject: [PATCH] a
+
+---
+ a | 1 +
+ 1 file changed, 1 insertion(+)
+ create mode 100644 a")
+ (goto-char (point-min))
+ (piem--insert-message-id-header "msg@id")
+ (buffer-string))))
(should
(string-match-p
(concat