Extract mail_postscreen into own test file

test/mail_postscreen.bats

@@ -0,0 +1,62 @@
+load 'test_helper/common'
+
+setup() {
+    run_setup_file_if_necessary
+
+    # Getting mail container IP
+    MAIL_POSTSCREEN_IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' mail_postscreen)
+}
+
+teardown() {
+    run_teardown_file_if_necessary
+}
+
+setup_file() {
+    docker run -d --name mail_postscreen \
+		-v "`pwd`/test/config":/tmp/docker-mailserver \
+		-v "`pwd`/test/test-files":/tmp/docker-mailserver-test:ro \
+		-e POSTSCREEN_ACTION=enforce \
+		--cap-add=NET_ADMIN \
+		-h mail.my-domain.com -t ${NAME}
+
+    docker run --name mail_postscreen_sender \
+        -v "$(pwd)/test/test-files":/tmp/docker-mailserver-test:ro \
+        -d ${NAME} \
+        tail -f /var/log/faillog
+
+    wait_for_smtp_port_in_container mail_postscreen
+}
+
+teardown_file() {
+    docker rm -f mail_postscreen mail_postscreen_sender
+}
+
+@test "first" {
+    skip 'only used to call setup_file from setup'
+}
+
+@test "checking postscreen: talk too fast" {
+  docker exec mail_postscreen_sender /bin/sh -c "nc $MAIL_POSTSCREEN_IP 25 < /tmp/docker-mailserver-test/auth/smtp-auth-login.txt"
+
+  repeat_until_success_or_timeout 10 run docker exec mail_postscreen grep 'COMMAND PIPELINING' /var/log/mail/mail.log
+  assert_success
+}
+
+@test "checking postscreen: positive test (respecting postscreen_greet_wait time and talking in turn)" {
+  for i in {1,2}; do
+    docker exec mail_postscreen_sender /bin/bash -c \
+    'exec 3<>/dev/tcp/'$MAIL_POSTSCREEN_IP'/25 && \
+    while IFS= read -r cmd; do \
+      head -1 <&3; \
+      [[ "$cmd" == "EHLO"* ]] && sleep 6; \
+      echo $cmd >&3; \
+    done < "/tmp/docker-mailserver-test/auth/smtp-auth-login.txt"'
+  done
+
+  repeat_until_success_or_timeout 10 run docker exec mail_postscreen grep 'PASS NEW ' /var/log/mail/mail.log
+  assert_success
+}
+
+@test "last" {
+    skip 'only used to call teardown_file from teardown'
+}