fix autoloading StringableObjectStub when running vendor/bin/phpunit ./tests/Support/SupportStringableTest.php directly (#58030)

Author: angus-mcritchie

tests/Support/Fixtures/StringableObjectStub.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Illuminate\Tests\Support\Fixtures;
+
+class StringableObjectStub
+{
+    private $value;
+
+    public function __construct($value)
+    {
+        $this->value = $value;
+    }
+
+    public function __toString()
+    {
+        return $this->value;
+    }
+}

tests/Support/SupportStrTest.php

@@ -4,6 +4,7 @@
 
 use Exception;
 use Illuminate\Support\Str;
+use Illuminate\Tests\Support\Fixtures\StringableObjectStub;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 use Ramsey\Uuid\UuidInterface;
@@ -1933,18 +1934,3 @@ public function count(): int
         $this->assertSame('UserGroups', Str::pluralPascal('UserGroup', $countable));
     }
 }
-
-class StringableObjectStub
-{
-    private $value;
-
-    public function __construct($value)
-    {
-        $this->value = $value;
-    }
-
-    public function __toString()
-    {
-        return $this->value;
-    }
-}

tests/Support/SupportStringableTest.php

@@ -9,6 +9,7 @@
 use Illuminate\Support\HtmlString;
 use Illuminate\Support\Stringable;
 use Illuminate\Support\Uri;
+use Illuminate\Tests\Support\Fixtures\StringableObjectStub;
 use League\CommonMark\Environment\EnvironmentBuilderInterface;
 use League\CommonMark\Extension\ExtensionInterface;
 use PHPUnit\Framework\TestCase;