fix: custom translator not receiving updated locale (#919)

Author: jordyvanderhaegen

src/Mcamara/LaravelLocalization/LaravelLocalization.php

@@ -194,6 +194,7 @@ public function setLocale($locale = null)
         }
 
         $this->app->setLocale($this->currentLocale);
+        $this->translator->setLocale($this->currentLocale);
 
         // Regional locale such as de_DE, so formatLocalized works in Carbon
         $regional = $this->getCurrentLocaleRegional();

tests/CustomTranslatorTest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Mcamara\LaravelLocalization\Tests;
+
+use Illuminate\Translation\ArrayLoader;
+use Illuminate\Translation\Translator;
+use Mcamara\LaravelLocalization\LaravelLocalization;
+
+class CustomTranslatorTest extends TestCase
+{
+    // The LaravelLocalization class supports the use of a custom translator instance.
+    // When the setLocale() method is invoked, it delegates the operation to the application instance,
+    // which, in turn, updates the locale on the translator instance bound in the service container.
+    // If a custom translator is provided, LaravelLocalization ensures that the locale is also set correctly
+    // on the custom translator to maintain consistent behavior across the application.
+    public function testCanSetLocaleForCustomTranslator(): void
+    {
+        $loader = new ArrayLoader();
+        $translator = new Translator($loader , 'en');
+        $localization = new LaravelLocalization(
+            $this->app,
+            $this->app['config'],
+            $translator,
+            $this->app['router'],
+            $this->app['request'],
+            $this->app['url']
+        );
+
+        $localization->setLocale('es');
+
+        $this->assertEquals('es', $translator->getLocale());
+    }
+}