Updates newsletter option creation logic and fixes a bug that results in

them being wiped clean

tests/unit/Models/NewsletterOptionTest.php

@@ -0,0 +1,40 @@
+<?php
+
+use MailPoet\Models\Newsletter;
+use MailPoet\Models\NewsletterOption;
+use MailPoet\Models\NewsletterOptionField;
+
+class NewsletterOptionTest extends MailPoetTest {
+  public $data;
+
+  function __construct() {
+    $this->data = array(
+      'newsletter_id' => 1,
+      'option_field_id' => 2,
+      'value' => 'test'
+    );
+  }
+
+  function testItCanCreateOrUpdateNewsletterOptionFieldRelation() {
+    // it can create
+    $data = $this->data;
+    NewsletterOption::createOrUpdate($data);
+    $newsletter_option = NewsletterOption::where('newsletter_id', $data['newsletter_id'])
+      ->where('option_field_id', $data['option_field_id'])
+      ->findOne();
+    expect($newsletter_option->value)->equals($data['value']);
+
+    // it can update
+    $data['value'] = 'updated test';
+    NewsletterOption::createOrUpdate($data);
+    $newsletter_option = NewsletterOption::where('newsletter_id', $data['newsletter_id'])
+      ->where('option_field_id', $data['option_field_id'])
+      ->findOne();
+    expect($newsletter_option->value)->equals($data['value']);
+  }
+
+
+  function _after() {
+    ORM::raw_execute('TRUNCATE ' . NewsletterOption::$_table);
+  }
+}