102 lines
3.9 KiB
Bash
102 lines
3.9 KiB
Bash
#!/bin/bash
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# shellcheck disable=SC2034,SC2155
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# ? ABOUT: Functions defined here help with sending emails in tests.
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# ! ATTENTION: This file is loaded by `common.sh` - do not load it yourself!
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# ! ATTENTION: This file requires helper functions from `common.sh`!
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# Sends a mail from localhost (127.0.0.1) to a container. To send
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# a custom email, create a file at `test/files/<TEST FILE>`,
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# and provide `<TEST FILE>` as an argument to this function.
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#
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# Parameters include all options that one can supply to `swaks`
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# itself. The `--data` parameter expects a relative path from `emails/`
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# where the contents will be implicitly provided to `swaks` via STDIN.
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#
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# ## Attention
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#
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# This function assumes `CONTAINER_NAME` to be properly set (to the container
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# name the command should be executed in)!
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#
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# This function will just send the email in an "asynchronous" fashion, i.e. it will
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# send the email but it will not make sure the mail queue is empty after the mail
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# has been sent.
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function _send_email() {
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[[ -v CONTAINER_NAME ]] || return 1
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# Parameter defaults common to our testing needs:
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local EHLO='mail.external.tld'
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local FROM='user@external.tld'
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local TO='user1@localhost.localdomain'
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local SERVER='0.0.0.0'
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local PORT=25
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# Extra options for `swaks` that aren't covered by the default options above:
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local ADDITIONAL_SWAKS_OPTIONS=()
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# Specifically for handling `--data` option below:
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local FINAL_SWAKS_OPTIONS=()
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while [[ ${#} -gt 0 ]]; do
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case "${1}" in
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( '--ehlo' ) EHLO=${2:?--ehlo given but no argument} ; shift 2 ;;
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( '--from' ) FROM=${2:?--from given but no argument} ; shift 2 ;;
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( '--to' ) TO=${2:?--to given but no argument} ; shift 2 ;;
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( '--server' ) SERVER=${2:?--server given but no argument} ; shift 2 ;;
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( '--port' ) PORT=${2:?--port given but no argument} ; shift 2 ;;
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( '--data' )
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local TEMPLATE_FILE="/tmp/docker-mailserver-test/emails/${2:?--data given but no argument provided}.txt"
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FINAL_SWAKS_OPTIONS+=('--data')
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FINAL_SWAKS_OPTIONS+=('-')
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FINAL_SWAKS_OPTIONS+=('<')
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FINAL_SWAKS_OPTIONS+=("${TEMPLATE_FILE}")
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shift 2
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;;
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( * ) ADDITIONAL_SWAKS_OPTIONS+=("${1}") ; shift 1 ;;
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esac
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done
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_run_in_container_bash "swaks --server ${SERVER} --port ${PORT} --ehlo ${EHLO} --from ${FROM} --to ${TO} ${ADDITIONAL_SWAKS_OPTIONS[*]} ${FINAL_SWAKS_OPTIONS[*]}"
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}
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# Like `_send_email` with two major differences:
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#
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# 1. this function waits for the mail to be processed; there is no asynchronicity
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# because filtering the logs in a synchronous way is easier and safer!
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# 2. this function prints an ID one can later filter by to check logs
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#
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# No. 2 is especially useful in case you send more than one email in a single
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# test file and need to assert certain log entries for each mail individually.
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#
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# This function takes the same arguments as `_send_mail`.
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#
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# ## Attention
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#
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# This function assumes `CONTAINER_NAME` to be properly set (to the container
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# name the command should be executed in)!
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#
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# ## Safety
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#
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# This functions assumes **no concurrent sending of emails to the same container**!
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# If two clients send simultaneously, there is no guarantee the correct ID is
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# chosen. Sending more than one mail at any given point in time with this function
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# is UNDEFINED BEHAVIOR!
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function _send_email_and_get_id() {
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[[ -v CONTAINER_NAME ]] || return 1
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_wait_for_empty_mail_queue_in_container
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_send_email "${@}"
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_wait_for_empty_mail_queue_in_container
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local MAIL_ID
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# The unique ID Postfix (and other services) use may be different in length
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# on different systems (e.g. amd64 (11) vs aarch64 (10)). Hence, we use a
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# range to safely capture it.
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MAIL_ID=$(_exec_in_container tac /var/log/mail.log \
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| grep -E -m 1 'postfix/smtpd.*: [A-Z0-9]+: client=localhost' \
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| grep -E -o '[A-Z0-9]{9,12}' || true)
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assert_not_equal "${MAIL_ID}" ''
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echo "${MAIL_ID}"
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}
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