Add 'display_revenues' feature flag

[MAILPOET-1853]

lib/Models/Newsletter.php

@@ -589,7 +589,8 @@ class Newsletter extends Model {
     }
 
     // WooCommerce revenues
-    if ($woocommerce_helper->isWooCommerceActive()) {
+    $settings = new SettingsController();
+    if ($woocommerce_helper->isWooCommerceActive() && $settings->get('display_revenues')) {
       $currency = $woocommerce_helper->getWoocommerceCurrency();
       $row = StatisticsWooCommercePurchases::selectExpr('SUM(order_price_total) AS total')
         ->where([

tests/DataFactories/Settings.php

@@ -116,4 +116,9 @@ class Settings {
     $this->settings->set('deactivate_subscriber_after_inactive_days', 180);
     return $this;
   }
+
+  function withDisplayRevenuesEnabled() {
+    $this->settings->set('display_revenues', true);
+    return $this;
+  }
 }

tests/acceptance/NewsletterStatisticsCest.php

@@ -4,6 +4,7 @@ namespace MailPoet\Test\Acceptance;
 
 require_once __DIR__ . '/../DataFactories/Newsletter.php';
 require_once __DIR__ . '/../DataFactories/NewsletterLink.php';
+require_once __DIR__ . '/../DataFactories/Settings.php';
 require_once __DIR__ . '/../DataFactories/StatisticsClicks.php';
 require_once __DIR__ . '/../DataFactories/StatisticsWooCommercePurchases.php';
 require_once __DIR__ . '/../DataFactories/Subscriber.php';
@@ -11,6 +12,7 @@ require_once __DIR__ . '/../DataFactories/WooCommerceOrder.php';
 
 use MailPoet\Test\DataFactories\Newsletter;
 use MailPoet\Test\DataFactories\NewsletterLink;
+use MailPoet\Test\DataFactories\Settings;
 use MailPoet\Test\DataFactories\StatisticsClicks;
 use MailPoet\Test\DataFactories\StatisticsWooCommercePurchases;
 use MailPoet\Test\DataFactories\Subscriber;
@@ -20,6 +22,7 @@ class NewsletterStatisticsCest {
 
   function _before(\AcceptanceTester $I) {
     $I->activateWooCommerce();
+    (new Settings())->withDisplayRevenuesEnabled();
   }
 
   function showWooCommercePurchaseStatistics(\AcceptanceTester $I) {