Merge pull request #21 from fetzi/bugfix/transform-null-handling

Add empty check for transform json data

Author: fetzi

src/JsonDecoder.php

@@ -87,6 +87,10 @@ public function decodesProtectedProperties()
 
     private function transform($transformer, $jsonArrayData, $instance)
     {
+        if (empty($jsonArrayData)) {
+            return null;
+        }
+
         $classBindings = new ClassBindings($this);
         $transformer->register($classBindings);
 

tests/specs/JsonDecoderSpec.php

@@ -103,6 +103,14 @@ public function it_should_be_able_to_transform_raw_with_private_properties()
         $response->getId()->shouldBe(1);
         $response->getName()->shouldReturn('John Doe');
     }
+
+    public function it_should_be_able_to_transform_null_values()
+    {
+        $this->register(new SampleTransformer());
+        $response = $this->decode('null', JsonDecoderSample::class);
+
+        $response->shouldBe(null);
+    }
 }
 
 class JsonDecoderSample