Added Laurent's tests/model save() method

lib/Models/Model.php

@@ -8,4 +8,12 @@ class Model extends \Sudzy\ValidModel {
     $customValidators = new CustomValidator();
     parent::__construct($customValidators->init());
   }
+
+  function save() {
+    if ($this->created_at === null) {
+      $this->created_at = date("Y-m-d H:i:s");
+    }
+    parent::save();
+  }
+
 }

tests/unit/Models/SettingCest.php

@@ -4,6 +4,7 @@ use MailPoet\Models\Setting;
 class SettingCest {
 
   function _before() {
+    $this->before_time = time();
     $this->data = array(
         'name'  => 'sending_method',
         'value' => 'smtp'
@@ -48,6 +49,39 @@ class SettingCest {
     expect($conflict_setting->getValidationErrors()[0])->equals('value_is_short');
   }
 
+  function itHasACreatedAtOnCreation() {
+    $setting = Setting::where('name', 'sending_method')
+                      ->findOne();
+    $time_difference = strtotime($setting->created_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itHasAnUpdatedAtOnCreation() {
+    $setting = Setting::where('name', 'sending_method')
+                      ->findOne();
+    $time_difference = strtotime($setting->updated_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itKeepsTheCreatedAtOnUpdate() {
+    $setting = Setting::where('name', 'sending_method')
+                      ->findOne();
+    $old_created_at = $setting->created_at;
+    $setting->value = 'http_api';
+    $setting->save();
+    expect($old_created_at)->equals($setting->created_at);
+  }
+
+  function itUpdatesTheUpdatedAtOnUpdate() {
+    $setting = Setting::where('name', 'sending_method')
+                      ->findOne();
+    $update_time = time();
+    $setting->value = 'http_api';
+    $setting->save();
+    $time_difference = strtotime($setting->updated_at) >= $update_time;
+    expect($time_difference)->equals(true);
+  }
+
   function _after() {
     $setting = Setting::where('name', $this->data['name'])
                       ->findOne()

tests/unit/Models/SubscriberCest.php

@@ -4,6 +4,7 @@ use MailPoet\Models\Subscriber;
 class SubscriberCest {
 
   function _before() {
+    $this->before_time = time();
     $this->data = array(
         'first_name' => 'John',
         'last_name'  => 'Mailer',
@@ -82,6 +83,45 @@ class SubscriberCest {
     expect($conflict_subscriber->getValidationErrors()[0])->equals('last_name_is_short');
   }
 
+  function itHasACreatedAtOnCreation() {
+    $subscriber = Subscriber::where('email', $this->data['email'])
+                            ->findOne();
+    $time_difference = strtotime($subscriber->created_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itHasAnUpdatedAtOnCreation() {
+    $subscriber = Subscriber::where('email', $this->data['email'])
+                            ->findOne();
+    $time_difference = strtotime($subscriber->updated_at) >= $this->before_time;
+    expect($time_difference)->equals(true);
+  }
+
+  function itKeepsTheCreatedAtOnUpdate() {
+    $subscriber = Subscriber::where('email', $this->data['email'])
+                            ->findOne();
+
+    $old_created_at = $subscriber->created_at;
+
+    $subscriber->first_name = 'New Name';
+    $subscriber->save();
+
+    expect($old_created_at)->equals($subscriber->created_at);
+  }
+
+  function itUpdatesTheUpdatedAtOnUpdate() {
+    $subscriber = Subscriber::where('email', $this->data['email'])
+                            ->findOne();
+
+    $update_time = time();
+    $subscriber->first_name = 'New Name';
+    $subscriber->save();
+
+    $time_difference = strtotime($subscriber->updated_at) >= $update_time;
+
+    expect($time_difference)->equals(true);
+  }
+
   function _after() {
     $subscriber = Subscriber::where('email', $this->data['email'])
                             ->findOne()