Issue #1561214 by mfb, sun, fietserwin, drzraf, sdrycroft, nicxvan: Bootstrap...

Issue #1561214 by mfb, sun, fietserwin, drzraf, sdrycroft, nicxvan: Bootstrap sets C locale, but does not set UTF-8 character encoding

core/lib/Drupal/Core/DrupalKernel.php

@@ -1001,7 +1001,7 @@ public static function bootEnvironment($app_root = NULL) {
 
     // Set sane locale settings, to ensure consistent string, dates, times and
     // numbers handling.
-    setlocale(LC_ALL, 'C');
+    setlocale(LC_ALL, 'C.UTF-8', 'C');
 
     // Set appropriate configuration for multi-byte strings.
     mb_internal_encoding('utf-8');

core/tests/Drupal/KernelTests/Core/DrupalKernel/DrupalKernelTest.php

@@ -12,6 +12,8 @@
 use Prophecy\Argument;
 use Symfony\Component\HttpFoundation\Request;
 
+// cspell:ignore äöüßαβγδεζηθικλμνξοσὠ
+
 /**
  * Tests DIC compilation to disk.
  *
@@ -295,4 +297,17 @@ public function testResetContainer() {
     $this->assertSame($request_stack, $container->get('request_stack'));
   }
 
+  /**
+   * Tests system locale.
+   */
+  public function testLocale(): void {
+    $utf8_string = 'äöüßαβγδεζηθικλμνξοσὠ';
+    // Test environment locale should be UTF-8.
+    $this->assertSame($utf8_string, escapeshellcmd($utf8_string));
+    $request = Request::createFromGlobals();
+    $kernel = $this->getTestKernel($request);
+    // Kernel environment locale should be UTF-8.
+    $this->assertSame($utf8_string, escapeshellcmd($utf8_string));
+  }
+
 }

core/tests/bootstrap.php

@@ -147,7 +147,7 @@ class_alias('\Drupal\Tests\DocumentElement', '\Behat\Mink\Element\DocumentElemen
 // Set sane locale settings, to ensure consistent string, dates, times and
 // numbers handling.
 // @see \Drupal\Core\DrupalKernel::bootEnvironment()
-setlocale(LC_ALL, 'C');
+setlocale(LC_ALL, 'C.UTF-8', 'C');
 
 // Set appropriate configuration for multi-byte strings.
 mb_internal_encoding('utf-8');