empty property name bug

Author: vearutop

src/Schema.php

@@ -303,6 +303,10 @@ private function process($data, $import = true, DataPreProcessor $preProcessor =
                 $this->fail(new ObjectException("Too many properties", ObjectException::TOO_MANY), $path);
             }
             foreach ($array as $key => $value) {
+                if ($key === '' && PHP_VERSION_ID < 71000) {
+                    $this->fail(new InvalidValue('Empty property name'), $path);
+                }
+
                 $found = false;
                 if (isset($this->dependencies[$key])) {
                     $dependencies = $this->dependencies[$key];

tests/src/PHPUnit/Constraint/AdditionalItemsTest.php

@@ -4,6 +4,7 @@
 
 
 use Swaggest\JsonSchema\InvalidValue;
+use Swaggest\JsonSchema\Schema;
 use Swaggest\JsonSchema\SchemaLoader;
 
 class AdditionalItemsTest extends \PHPUnit_Framework_TestCase
@@ -25,4 +26,18 @@ public function testAdditionalItemsAreNotAllowed()
         $schema->import(array(1,2,3,4));
     }
 
+    public function testEmptyPropertyName()
+    {
+        $schema = new Schema();
+        $schema->additionalProperties = Schema::integer();
+
+        if (PHP_VERSION_ID < 71000) {
+            $this->setExpectedException(get_class(new InvalidValue()), 'Empty property name');
+        }
+
+        $data = (object)array('' => 1, 'a' => 2, 1 => 3);
+        $schema->import($data);
+        $schema->export($data);
+    }
+
 }