Update loader in CodeGeneratorEngineFactory

The code update removes the dependency on Psr18ClientDiscovery and Psr18Loader and replaces it with StreamWrapperLoader in the CodeGeneratorEngineFactory. Additionally, a corresponding test for this change has been created in CodeGeneratorEngineFactoryTest to verify that the engine can be correctly loaded from the filesystem.

Fixes #510

src/Phpro/SoapClient/Soap/CodeGeneratorEngineFactory.php

@@ -3,7 +3,6 @@
 
 namespace Phpro\SoapClient\Soap;
 
-use Http\Discovery\Psr18ClientDiscovery;
 use Phpro\SoapClient\Soap\ExtSoap\Metadata\Manipulators\DuplicateTypes\IntersectDuplicateTypesStrategy;
 use Phpro\SoapClient\Soap\Metadata\MetadataFactory;
 use Phpro\SoapClient\Soap\Metadata\MetadataOptions;
@@ -12,8 +11,8 @@
 use Soap\Engine\NoopTransport;
 use Soap\Engine\PartialDriver;
 use Soap\Engine\SimpleEngine;
-use Soap\Psr18Transport\Wsdl\Psr18Loader;
 use Soap\Wsdl\Loader\FlatteningLoader;
+use Soap\Wsdl\Loader\StreamWrapperLoader;
 use Soap\Wsdl\Loader\WsdlLoader;
 use Soap\WsdlReader\Locator\ServiceSelectionCriteria;
 use Soap\WsdlReader\Metadata\Wsdl1MetadataProvider;
@@ -33,7 +32,7 @@ public static function create(
         ?SoapVersion $preferredSoapVersion = null,
         ?ParserContext $parserContext = null,
     ): Engine {
-        $loader ??= new FlatteningLoader(Psr18Loader::createForClient(Psr18ClientDiscovery::find()));
+        $loader ??= new FlatteningLoader(new StreamWrapperLoader());
         $metadataOptions ??= MetadataOptions::empty()->withTypesManipulator(
             // Ext-soap is not able to work with duplicate types (see FAQ)
             // Therefore, we decided to combine all duplicate types into 1 big intersected type by default instead.

test/Phpro/SoapClient/Soap/CodeGeneratorEngineFactoryTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Phpro\SoapClient\Soap;
+
+use PHPUnit\Framework\TestCase;
+use Soap\Engine\Engine;
+use Soap\Engine\Metadata\Metadata;
+
+class CodeGeneratorEngineFactoryTest extends TestCase
+{
+    public function test_it_loads_from_filesystem(): void
+    {
+        $engine = CodeGeneratorEngineFactory::create(__DIR__ . '/../../../fixtures/wsdl/functional/calculator.wsdl');
+        $this->assertInstanceOf(Engine::class, $engine);
+        self::assertInstanceOf(Metadata::class, $engine->getMetadata());
+    }
+}