Add array-key support for ArrayBinding

Resolves #52, #53

Author: Jakob Linskeseder

.php-cs-fixer.php

@@ -6,10 +6,11 @@
     ->append(['.php-cs-fixer.php']);
 
 $rules = [
-    '@Symfony'               => true,
-    'phpdoc_no_empty_return' => false,
-    'yoda_style'             => false,
-    'binary_operator_spaces' => [
+    '@Symfony'                => true,
+    'global_namespace_import' => false,
+    'phpdoc_no_empty_return'  => false,
+    'yoda_style'              => false,
+    'binary_operator_spaces'  => [
         'operators' => [
             '=>' => 'align',
             '='  => 'align',

src/Bindings/ArrayBinding.php

@@ -18,8 +18,8 @@ public function bind(JsonDecoder $jsonDecoder, ?array $jsonData, Property $prope
             $values = [];
 
             if (is_array($data)) {
-                foreach ($data as $item) {
-                    $values[] = $jsonDecoder->decodeArray($item, $this->type);
+                foreach ($data as $key => $item) {
+                    $values[$key] = $jsonDecoder->decodeArray($item, $this->type);
                 }
 
                 $property->set($values);

tests/Bindings/ArrayBindingTest.php

@@ -41,6 +41,36 @@ public function itBindsAnArray()
         $this->assertEquals('City 2', $person->address()[1]->city());
     }
 
+    /** @test */
+    public function itBindsAnArrayPreservingKeys()
+    {
+        $binding  = new ArrayBinding('address', 'addresses', Address::class);
+        $person   = new Person();
+        $property = Property::create($person, 'address');
+
+        $jsonData = [
+            'addresses' => [
+                'address key #1' => [
+                    'street' => 'Street 1',
+                    'city'   => 'City 1',
+                ],
+                'address key #2' => [
+                    'street' => 'Street 2',
+                    'city'   => 'City 2',
+                ],
+            ],
+        ];
+
+        $binding->bind(new JsonDecoder(), $jsonData, $property);
+
+        $this->assertIsArray($person->address());
+        $this->assertCount(2, $person->address());
+        $this->assertEquals('Street 1', $person->address()['address key #1']->street());
+        $this->assertEquals('City 1', $person->address()['address key #1']->city());
+        $this->assertEquals('Street 2', $person->address()['address key #2']->street());
+        $this->assertEquals('City 2', $person->address()['address key #2']->city());
+    }
+
     /** @test */
     public function itSkipsANotAvailableField()
     {