send-email: add an auto option for transfer encoding

diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index e80eacbb1b81a319232c0b5f28aab3c82d795a93..a35cba6a4cc0c608701323b613f6076504a9f59b 100755 (executable)
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -456,6 +456,29 @@ test_expect_success $PREREQ 'allow long lines with --no-validate' '
                2>errors
 '
 
+test_expect_success $PREREQ 'short lines with auto encoding are 8bit' '
+       clean_fake_sendmail &&
+       git send-email \
+               --from="A <author@example.com>" \
+               --to=nobody@example.com \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               --transfer-encoding=auto \
+               $patches &&
+       grep "Content-Transfer-Encoding: 8bit" msgtxt1
+'
+
+test_expect_success $PREREQ 'long lines with auto encoding are quoted-printable' '
+       clean_fake_sendmail &&
+       git send-email \
+               --from="Example <nobody@example.com>" \
+               --to=nobody@example.com \
+               --smtp-server="$(pwd)/fake.sendmail" \
+               --transfer-encoding=auto \
+               --no-validate \
+               longline.patch &&
+       grep "Content-Transfer-Encoding: quoted-printable" msgtxt1
+'
+
 test_expect_success $PREREQ 'Invalid In-Reply-To' '
        clean_fake_sendmail &&
        git send-email \