feat(presets): reworks code

src/ArchPresets/AbstractPreset.php

@@ -5,21 +5,27 @@ declare(strict_types=1);
 namespace Pest\ArchPresets;
 
 use Pest\Arch\Contracts\ArchExpectation;
+use Pest\Expectation;
 
 /**
  * @internal
  */
 abstract class AbstractPreset
 {
+    /**
+     * The expectations.
+     *
+     * @var array<int, ArchExpectation>
+     */
+    protected array $expectations = [];
+
     /**
      * Creates a new preset instance.
      *
      * @param  array<int, string>  $userNamespaces
-     * @param  array<int, ArchExpectation>  $expectations
      */
-    final public function __construct(// @phpstan-ignore-line
-        protected array $userNamespaces,
-        protected array $expectations = [],
+    final public function __construct(
+        private readonly array $userNamespaces,
     ) {
         //
     }
@@ -44,6 +50,20 @@ abstract class AbstractPreset
         );
     }
 
+    /**
+     * Runs the given callback for each namespace.
+     *
+     * @param  callable(Expectation<string|null>): ArchExpectation  ...$callbacks
+     */
+    final public function eachUserNamespace(callable ...$callbacks): void
+    {
+        foreach ($this->userNamespaces as $namespace) {
+            foreach ($callbacks as $callback) {
+                $this->expectations[] = $callback(expect($namespace));
+            }
+        }
+    }
+
     /**
      * Flushes the expectations.
      */