implements decorators pipeline

src/Support/Extendable.php

@@ -30,4 +30,9 @@ final class Extendable
     {
         $this->extendableClass::extend($name, $extend);
     }
+
+    public function decorate(string $name, Closure $extend): void
+    {
+        $this->extendableClass::decorate($name, $extend);
+    }
 }

src/Support/Pipeline.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Support;
+
+use Closure;
+
+final class Pipeline
+{
+    /** @var array<Closure> */
+    private $pipes = [];
+
+    /** @var array<mixed> */
+    private $passable;
+
+    /**
+     * @param array<mixed> $passable
+     */
+    public function __construct(...$passable)
+    {
+        $this->passable = $passable;
+    }
+
+    /**
+     * @param array<mixed> $passable
+     */
+    public static function send(...$passable): self
+    {
+        return new self(...$passable);
+    }
+
+    /**
+     * @param array<Closure> $pipes
+     */
+    public function through(array $pipes): self
+    {
+        $this->pipes = $pipes;
+
+        return $this;
+    }
+
+    public function finally(Closure $finalClosure): void
+    {
+        $pipeline = array_reduce(
+            array_reverse($this->pipes),
+            $this->carry(),
+            $this->prepareFinalClosure($finalClosure)
+        );
+
+        $pipeline(...$this->passable);
+    }
+
+    public function carry(): Closure
+    {
+        return function ($stack, $pipe): Closure {
+            return function (...$passable) use ($stack, $pipe) {
+                return $pipe($stack, ...$passable);
+            };
+        };
+    }
+
+    private function prepareFinalClosure(Closure $finalClosure): Closure
+    {
+        return function (...$passable) use ($finalClosure) {
+            return $finalClosure($passable);
+        };
+    }
+}