Implement IteratorAggregate for Resolution::class

Author: olivervogel

src/Resolution.php

@@ -4,10 +4,16 @@
 
 namespace Intervention\Image;
 
+use ArrayIterator;
 use Intervention\Image\Interfaces\ResolutionInterface;
+use IteratorAggregate;
 use Stringable;
+use Traversable;
 
-class Resolution implements ResolutionInterface, Stringable
+/**
+ * @implements IteratorAggregate<float>
+ */
+class Resolution implements ResolutionInterface, Stringable, IteratorAggregate
 {
     public const PER_INCH = 1;
     public const PER_CM = 2;
@@ -24,6 +30,17 @@ public function __construct(
         protected float $y,
         protected int $per_unit = self::PER_INCH
     ) {
+        //
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @see IteratorAggregate::getIterator()
+     */
+    public function getIterator(): Traversable
+    {
+        return new ArrayIterator([$this->x, $this->y]);
     }
 
     /**

tests/Unit/ResolutionTest.php

@@ -17,6 +17,14 @@ public function testConstructor(): void
         $this->assertInstanceOf(Resolution::class, $resolution);
     }
 
+    public function testIteration(): void
+    {
+        $resolution = new Resolution(1.2, 3.4);
+        foreach ($resolution as $value) {
+            $this->assertIsFloat($value);
+        }
+    }
+
     public function testXY(): void
     {
         $resolution = new Resolution(1.2, 3.4);