! grep "^In-Reply-To: < *>" msgtxt1
'
+test_expect_success $PREREQ 'In-Reply-To without --chain-reply-to' '
+ clean_fake_sendmail &&
+ echo "<unique-message-id@example.com>" >expect &&
+ git send-email \
+ --from="Example <nobody@example.com>" \
+ --to=nobody@example.com \
+ --no-chain-reply-to \
+ --in-reply-to="$(cat expect)" \
+ --smtp-server="$(pwd)/fake.sendmail" \
+ $patches $patches $patches \
+ 2>errors &&
+ # The first message is a reply to --in-reply-to
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt1 >actual &&
+ test_cmp expect actual &&
+ # Second and subsequent messages are replies to the first one
+ sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt1 >expect &&
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt2 >actual &&
+ test_cmp expect actual &&
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt3 >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success $PREREQ 'In-Reply-To with --chain-reply-to' '
+ clean_fake_sendmail &&
+ echo "<unique-message-id@example.com>" >expect &&
+ git send-email \
+ --from="Example <nobody@example.com>" \
+ --to=nobody@example.com \
+ --chain-reply-to \
+ --in-reply-to="$(cat expect)" \
+ --smtp-server="$(pwd)/fake.sendmail" \
+ $patches $patches $patches \
+ 2>errors &&
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt1 >actual &&
+ test_cmp expect actual &&
+ sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt1 >expect &&
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt2 >actual &&
+ test_cmp expect actual &&
+ sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt2 >expect &&
+ sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt3 >actual &&
+ test_cmp expect actual
+'
+
test_expect_success $PREREQ 'setup fake editor' '
(echo "#!$SHELL_PATH" &&
echo "echo fake edit >>\"\$1\""