Fix: Replace script with tests

Closes GH-631.

Author: localheinz

include/check_email_func.php

@@ -0,0 +1,53 @@
+--TEST--
+clean_AntiSPAM() removes spam terms
+--FILE--
+<?php
+
+require_once __DIR__ . '/../include/email-validation.inc';
+
+$emails = array (
+    'asasasd324324@php.net',
+    'jcastagnetto-delete-this-@yahoo.com',
+    'jcastagnetto-i-hate-spam@NOSPAMyahoo.com',
+    'jcastagnetto-NO-SPAM@yahoo.com',
+    'jcastagnetto@NoSpam-yahoo.com',
+    'jesusmc@scripps.edu',
+    'jmcastagnetto@chek2.com',
+    'jmcastagnetto@yahoo.com',
+    'some-wrong@asdas.com',
+    'wrong-address-with@@@@-remove_me-and-some-i-hate_SPAM-stuff',
+    'wrong-email-address@lists.php.net',
+);
+
+$cleanedEmails = array_map(static function (string $email): string {
+    return clean_AntiSPAM($email);
+}, $emails);
+
+var_dump($cleanedEmails);
+
+?>
+--EXPECT--
+array(11) {
+  [0]=>
+  string(21) "asasasd324324@php.net"
+  [1]=>
+  string(22) "jcastagnetto@yahoo.com"
+  [2]=>
+  string(22) "jcastagnetto@yahoo.com"
+  [3]=>
+  string(22) "jcastagnetto@yahoo.com"
+  [4]=>
+  string(22) "jcastagnetto@yahoo.com"
+  [5]=>
+  string(19) "jesusmc@scripps.edu"
+  [6]=>
+  string(23) "jmcastagnetto@chek2.com"
+  [7]=>
+  string(23) "jmcastagnetto@yahoo.com"
+  [8]=>
+  string(20) "some-wrong@asdas.com"
+  [9]=>
+  string(35) "wrong-address-with@@@@and-somestuff"
+  [10]=>
+  string(33) "wrong-email-address@lists.php.net"
+}

tests/clean-anti-spam.phpt

@@ -0,0 +1,43 @@
+--TEST--
+is_emailable_address() returns whether email is emailable
+--FILE--
+<?php
+
+require_once __DIR__ . '/../include/email-validation.inc';
+
+$emails = array(
+    'asasasd324324@php.net',
+    'jcastagnetto-delete-this-@yahoo.com',
+    'jcastagnetto-i-hate-spam@NOSPAMyahoo.com',
+    'jcastagnetto-NO-SPAM@yahoo.com',
+    'jcastagnetto@NoSpam-yahoo.com',
+    'jesusmc@scripps.edu',
+    'jmcastagnetto@chek2.com',
+    'jmcastagnetto@yahoo.com',
+    'some-wrong@asdas.com',
+    'wrong-address-with@@@@-remove_me-and-some-i-hate_SPAM-stuff',
+    'wrong-email-address@lists.php.net',
+);
+
+$emailsThatAreEmailableAddresses = array_filter($emails, static function (string $email): bool {
+    return is_emailable_address($email);
+});
+
+var_dump($emailsThatAreEmailableAddresses);
+
+?>
+--EXPECT--
+array(6) {
+  [0]=>
+  string(21) "asasasd324324@php.net"
+  [1]=>
+  string(35) "jcastagnetto-delete-this-@yahoo.com"
+  [3]=>
+  string(30) "jcastagnetto-NO-SPAM@yahoo.com"
+  [5]=>
+  string(19) "jesusmc@scripps.edu"
+  [7]=>
+  string(23) "jmcastagnetto@yahoo.com"
+  [8]=>
+  string(20) "some-wrong@asdas.com"
+}