Extract mail_lmtp_ip into own test file

test/mail_lmtp_ip.bats

@@ -0,0 +1,54 @@
+load 'test_helper/common'
+
+setup() {
+    run_setup_file_if_necessary
+}
+
+teardown() {
+    run_teardown_file_if_necessary
+}
+
+setup_file() {
+    docker run -d --name mail_lmtp_ip \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/config/dovecot-lmtp":/etc/dovecot \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-e ENABLE_POSTFIX_VIRTUAL_TRANSPORT=1 \
+		-e POSTFIX_DAGENT=lmtp:127.0.0.1:24 \
+		-e DMS_DEBUG=0 \
+		-h mail.my-domain.com -t ${NAME}
+    wait_for_finished_setup_in_container mail_lmtp_ip
+}
+
+
+teardown_file() {
+    docker rm -f mail_lmtp_ip
+}
+
+@test "first" {
+    skip 'only used to call setup_file from setup'
+}
+
+#
+# Postfix VIRTUAL_TRANSPORT
+#
+@test "checking postfix-lmtp: virtual_transport config is set" {
+  run docker exec mail_lmtp_ip /bin/sh -c "grep 'virtual_transport = lmtp:127.0.0.1:24' /etc/postfix/main.cf"
+  assert_success
+}
+
+@test "checking postfix-lmtp: delivers mail to existing account" {
+  # maybe we can move this into the setup to speed things up futher.
+  # this likely would need an async coroutine to avoid blocking the other tests while waiting for the server to come up
+  wait_for_smtp_port_in_container mail_lmtp_ip
+  run docker exec mail_lmtp_ip /bin/sh -c "nc 0.0.0.0 25 < /tmp/docker-mailserver-test/email-templates/existing-user1.txt"
+  assert_success
+  
+  repeat_until_success_or_timeout 60 run docker exec mail_lmtp_ip /bin/sh -c "grep 'postfix/lmtp' /var/log/mail/mail.log | grep 'status=sent' | grep ' Saved)' | wc -l"
+  assert_success
+  assert_output 1
+}
+
+@test "last" {
+    skip 'only used to call teardown_file from teardown'
+}