[gmime] Added unit tests for formatting the Subject header

[Jeffrey Stedfast <fejj src gnome org>]

commit 01393e9ea1da235e9a3cc9243c836bddc603b573
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Sun May 21 12:25:46 2017 -0400

    Added unit tests for formatting the Subject header

 tests/test-headers.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-headers.c b/tests/test-headers.c
index fa35b27..07a7413 100644
--- a/tests/test-headers.c
+++ b/tests/test-headers.c
@@ -567,6 +567,9 @@ static struct {
        { "Message-Id",
          "<this is a really really reeeaalllllllllllllly looooooooooong message id some internet host com>",
          " <this is a really really reeeaalllllllllllllly looooooooooong message id some internet host 
com>\n" },
+       { "Subject",
+         "this is a really, really, reeeeeeaaaaaaalllllllllllllly loooooooooooooonnnnnggggggggggg test 
subject which should get folded into multiple lines",
+         " this is a really, really, reeeeeeaaaaaaalllllllllllllly\n loooooooooooooonnnnnggggggggggg test 
subject which should get folded into\n multiple lines\n" },
 };
 
 static void