Unit tests for listing specific methods

- small fixes/optimization in Subscriber model
- added test for search and group in Subscriber
- added test for search in Newsletter

tests/unit/Models/SubscriberCest.php

@@ -4,16 +4,29 @@ use MailPoet\Models\Subscriber;
 class SubscriberCest {
 
   function _before() {
-    $this->before_time = time();
     $this->data = array(
       'first_name' => 'John',
       'last_name' => 'Mailer',
-      'email' => 'john@mailpoet.com'
+      'email' => 'jo@mailpoet.com'
     );
 
     $this->subscriber = Subscriber::create();
     $this->subscriber->hydrate($this->data);
     $this->saved = $this->subscriber->save();
+
+    $subscribed = Subscriber::create();
+    $subscribed->hydrate(array(
+      'email' => 'marco@mailpoet.com',
+      'status' => 'subscribed'
+    ));
+    $subscribed->save();
+
+    $unsubscribed = Subscriber::create();
+    $unsubscribed->hydrate(array(
+      'email' => 'marco@mailpoet.com',
+      'status' => 'unsubscribed'
+    ));
+    $unsubscribed->save();
   }
 
   function itCanBeCreated() {
@@ -64,6 +77,34 @@ class SubscriberCest {
     expect($subscriber_updated->status)->equals('subscribed');
   }
 
+  function itHasASearchFilter() {
+    $subscriber = Subscriber::filter('search', 'john')->findOne();
+    expect($subscriber->first_name)->equals($this->data['first_name']);
+
+    $subscriber = Subscriber::filter('search', 'mailer')->findOne();
+    expect($subscriber->last_name)->equals($this->data['last_name']);
+
+    $subscriber = Subscriber::filter('search', 'mailpoet')->findOne();
+    expect($subscriber->email)->equals($this->data['email']);
+  }
+
+  function itHasAGroupFilter() {
+    $subscribers = Subscriber::filter('group', 'unconfirmed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('unconfirmed');
+    }
+
+    $subscribers = Subscriber::filter('group', 'subscribed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('subscribed');
+    }
+
+    $subscribers = Subscriber::filter('group', 'unsubscribed')->findMany();
+    foreach($subscribers as $subscriber) {
+      expect($subscriber->status)->equals('unsubscribed');
+    }
+  }
+
   function emailMustBeUnique() {
     $conflict_subscriber = Subscriber::create();
     $conflict_subscriber->hydrate($this->data);