Feature/Add map values functionality (#14)

src/Traits/HasAttributes.php

@@ -4,6 +4,8 @@
 
 namespace ComplexHeart\Domain\Model\Traits;
 
+use Closure;
+
 use function Lambdish\Phunctional\map;
 
 /**
@@ -34,14 +36,20 @@ final public static function attributes(): array
      *
      * @return array<string, mixed>
      */
-    final public function values(): array
+    final public function values(Closure $fn = null): array
     {
         $allowed = static::attributes();
 
-        return array_intersect_key(
+        $attributes = array_intersect_key(
             get_object_vars($this),
             array_combine($allowed, $allowed)
         );
+
+        if (is_callable($fn)) {
+            return map($fn, $attributes);
+        }
+
+        return $attributes;
     }
 
     /**

tests/ModelTest.php

@@ -0,0 +1,13 @@
+<?php
+
+use ComplexHeart\Domain\Model\Test\OrderManagement\Domain\Price;
+
+test('Model values should be mapped by custom function sucessfully', function() {
+    $price = new Price(10, 'AUD');
+
+    $values = $price->values(fn($attribute) => "-->$attribute");
+
+    expect($values['amount'])->toStartWith('-->');
+    expect($values['currency'])->toStartWith('-->');
+})
+    ->group('Unit');