Capitalized .env Key

.env.example

@@ -39,7 +39,7 @@ SHOP_MAIL_FROM=
 ADMIN_MAIL_TO=
 MAIL_FROM_NAME=
 
-fixer_api_key=
+FIXER_API_KEY=
 
 PUSHER_APP_ID=
 PUSHER_APP_KEY=

config/services.php

@@ -33,7 +33,7 @@ return [
         'default' => 'exchange_rates',
 
         'fixer' => [
-            'key' => env('fixer_api_key'),
+            'key' => env('FIXER_API_KEY'),
             'class' => 'Webkul\Core\Helpers\Exchange\FixerExchange'
         ],
 

tests/functional/Admin/Settings/ExchangeRatesCest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Tests\Functional\Admin\Settings;
+
+use FunctionalTester;
+
+class ExchangeRatesCest
+{
+    public function testIndex(FunctionalTester $I): void
+    {
+        $I->loginAsAdmin();
+        $I->amOnAdminRoute('admin.dashboard.index');
+
+        $I->click(__('admin::app.layouts.settings'), '//*[contains(@class, "navbar-left")]');
+        $I->click(__('admin::app.layouts.exchange-rates'), '//*[contains(@class, "aside-nav")]');
+
+        $I->seeCurrentRouteIs('admin.exchange_rates.index');
+    }
+}