Fix issue 2

Author: SOHELAHMED7

src/spec/SecurityRequirements.php

@@ -26,8 +26,7 @@ public function __construct(array $data)
         foreach ($data as $index => $value) {
             if (is_numeric($index)) { // read
                 if ($value === []) { # empty Security Requirement Object (`{}`) = anonymous access https://github.com/cebe/php-openapi/issues/238
-                    $this->_securityRequirements[$index] = new SecurityRequirement($value);
-//                    break;
+                    $this->_securityRequirements[$index] = $value;
                 } else {
                     $this->_securityRequirements[array_keys($value)[0]] = new SecurityRequirement(array_values($value)[0]);
                 }
@@ -69,7 +68,7 @@ public function getSerializableData()
             /** @var SecurityRequirement $securityRequirement */
 
             if (is_numeric($name)) {
-                $data[$name] = $securityRequirement->getSerializableData();
+                $data[$name] = (object) $securityRequirement; # case https://github.com/cebe/php-openapi/issues/238
             } else {
                 $data[] = [$name => $securityRequirement->getSerializableData()];
             }

tests/issues/238/Issue238Test.php

@@ -1,19 +1,59 @@
 <?php
 
 use cebe\openapi\Reader;
+use cebe\openapi\spec\OpenApi;
+use cebe\openapi\spec\SecurityRequirements;
+use cebe\openapi\Writer;
 
 // https://github.com/cebe/php-openapi/issues/238
 class Issue238Test extends \PHPUnit\Framework\TestCase
 {
-    public function test238AddSupportForEmptySecurityRequirementObjectInSecurityRequirement()
+    public function test238AddSupportForEmptySecurityRequirementObjectInSecurityRequirementRead()
     {
         $openapi = Reader::readFromYamlFile(dirname(dirname(__DIR__)).'/data/issue/238/spec.yml');
         $this->assertInstanceOf(\cebe\openapi\SpecObjectInterface::class, $openapi);
         $this->assertInstanceOf(\cebe\openapi\spec\SecurityRequirements::class, $openapi->paths->getPath('/path-secured')->getOperations()['get']->security);
-        $this->assertSame($openapi->paths->getPath('/path-secured')->getOperations()['get']->security->getSerializableData(), [[]]);
+        $this->assertSame(json_decode(json_encode($openapi->paths->getPath('/path-secured')->getOperations()['get']->security->getSerializableData()), true), [[]]);
 
 //        return; # TODO
 //        $openapi = Reader::readFromJsonFile(__DIR__.'/data/issue/238/spec.json');
 //        $this->assertInstanceOf(\cebe\openapi\SpecObjectInterface::class, $openapi);
     }
+
+    public function test238AddSupportForEmptySecurityRequirementObjectInSecurityRequirementWrite()
+    {
+        $openapi = $this->createOpenAPI([
+            'security' => new SecurityRequirements([
+                []
+            ]),
+        ]);
+
+        $yaml = Writer::writeToYaml($openapi);
+
+        $this->assertEquals(preg_replace('~\R~', "\n", <<<YAML
+openapi: 3.0.0
+info:
+  title: 'Test API'
+  version: 1.0.0
+paths: {  }
+security:
+  - {  }
+
+YAML
+        ),
+            $yaml
+        );
+    }
+
+    private function createOpenAPI($merge = [])
+    {
+        return new OpenApi(array_merge([
+            'openapi' => '3.0.0',
+            'info' => [
+                'title' => 'Test API',
+                'version' => '1.0.0',
+            ],
+            'paths' => [],
+        ], $merge));
+    }
 }