Add context to process timeout exception

src/ValueObject/ChildProcessTimeoutException.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symplify\EasyParallel\ValueObject;
+
+use Exception;
+
+class ChildProcessTimeoutException extends Exception
+{
+    /**
+     * @var mixed[]
+     */
+    private array $context = [];
+
+    /**
+     * @param mixed[] $context
+     */
+    public function __construct(
+        string $message = '',
+        array $context = [],
+        int $code = 0,
+        ?Throwable $previous = null
+    ) {
+        parent::__construct($message, $code, $previous);
+        $this->context = $context;
+    }
+
+    /**
+     * @return mixed[]
+     */
+    public function getContext(): array
+    {
+        return $this->context;
+    }
+}

src/ValueObject/ParallelProcess.php

@@ -6,7 +6,6 @@
 
 use Clue\React\NDJson\Decoder;
 use Clue\React\NDJson\Encoder;
-use Exception;
 use React\ChildProcess\Process;
 use React\EventLoop\LoopInterface;
 use React\EventLoop\TimerInterface;
@@ -98,11 +97,11 @@ public function request(array $data): void
     {
         $this->cancelTimer();
         $this->encoder->write($data);
-        $this->timer = $this->loop->addTimer($this->timetoutInSeconds, function (): void {
+        $this->timer = $this->loop->addTimer($this->timetoutInSeconds, function () use ($data): void {
             $onError = $this->onError;
 
             $errorMessage = sprintf('Child process timed out after %d seconds', $this->timetoutInSeconds);
-            $onError(new Exception($errorMessage));
+            $onError(new ChildProcessTimeoutException($errorMessage, $data));
         });
     }