fix: fix finfo guesser in coroutines

src/support/src/FileinfoMimeTypeGuesser.php

@@ -15,6 +15,7 @@
 
 use Exception;
 use finfo;
+use Hypervel\Context\CoroutineContext;
 use InvalidArgumentException;
 use LogicException;
 use RuntimeException;
@@ -24,10 +25,7 @@
  */
 class FileinfoMimeTypeGuesser
 {
-    /**
-     * @var array<string, finfo>
-     */
-    private static $finfoCache = [];
+    public const FINFO_CONTEXT_KEY_PREFIX = '__support.finfo_mime_type_guesser.';
 
     /**
      * @param null|string $magicFile A magic file to use with the finfo instance
@@ -55,7 +53,10 @@ public function guessMimeType(string $path): ?string
         }
 
         try {
-            $finfo = self::$finfoCache[$this->magicFile] ??= new finfo(FILEINFO_MIME_TYPE, $this->magicFile);
+            $finfo = CoroutineContext::getOrSet(
+                self::FINFO_CONTEXT_KEY_PREFIX . ($this->magicFile ?? ''),
+                fn () => new finfo(FILEINFO_MIME_TYPE, $this->magicFile)
+            );
         } catch (Exception $e) {
             throw new RuntimeException($e->getMessage());
         }

tests/Support/FileinfoMimeTypeGuesserTest.php

@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Hypervel\Tests\Support;
+
+use finfo;
+use Hypervel\Context\CoroutineContext;
+use Hypervel\Support\FileinfoMimeTypeGuesser;
+use Hypervel\Tests\TestCase;
+use InvalidArgumentException;
+use PHPUnit\Framework\Attributes\RequiresPhpExtension;
+
+use function Hypervel\Coroutine\parallel;
+
+#[RequiresPhpExtension('fileinfo')]
+class FileinfoMimeTypeGuesserTest extends TestCase
+{
+    public function testGuessMimeTypeWithInvalidFile()
+    {
+        $this->expectException(InvalidArgumentException::class);
+
+        (new FileinfoMimeTypeGuesser)
+            ->guessMimeType(__DIR__ . '/unknown');
+    }
+
+    public function testGuessMimeType()
+    {
+        $mimeType = (new FileinfoMimeTypeGuesser)
+            ->guessMimeType(__DIR__ . '/Fixtures/test.gif');
+
+        $this->assertEquals('image/gif', $mimeType);
+    }
+
+    public function testGuessMimeTypeIsCoroutineScoped()
+    {
+        $guesser = new FileinfoMimeTypeGuesser;
+        $key = FileinfoMimeTypeGuesser::FINFO_CONTEXT_KEY_PREFIX;
+
+        $results = parallel(array_fill(0, 5, function () use ($guesser, $key) {
+            return [
+                'mimeType' => $guesser->guessMimeType(__DIR__ . '/Fixtures/test.gif'),
+                'finfo' => CoroutineContext::get($key),
+            ];
+        }));
+
+        $this->assertCount(5, $results);
+        foreach ($results as $result) {
+            $this->assertSame('image/gif', $result['mimeType']);
+        }
+
+        $finfoInstances = array_column($results, 'finfo');
+
+        $this->assertContainsOnlyInstancesOf(finfo::class, $finfoInstances);
+        $this->assertCount(5, array_unique(array_map(spl_object_id(...), $finfoInstances)));
+    }
+}