update guzzle

-vendor
\ No newline at end of file
+vendor
+.dccache

+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Listen for Xdebug",
+            "type": "php",
+            "request": "launch",
+            "port": 9003
+        },
+        {
+            "name": "Launch currently open script",
+            "type": "php",
+            "request": "launch",
+            "program": "${file}",
+            "cwd": "./vendor/bin/phpunit",
+            "port": 0,
+            "runtimeArgs": [
+                // "-dxdebug.start_with_request=yes",
+                "tests",
+            ],
+            "env": {
+                "XDEBUG_MODE": "debug,develop",
+                "XDEBUG_CONFIG": "client_port=${port}"
+            }
+        },
+        {
+            "name": "Launch Built-in web server",
+            "type": "php",
+            "request": "launch",
+            "runtimeArgs": [
+                "-dxdebug.mode=debug",
+                "-dxdebug.start_with_request=yes",
+                "-S",
+                "localhost:0"
+            ],
+            "program": "",
+            "cwd": "${workspaceRoot}",
+            "port": 9003,
+            "serverReadyAction": {
+                "pattern": "Development Server \\(http://localhost:([0-9]+)\\) started",
+                "uriFormat": "http://localhost:%s",
+                "action": "openExternally"
+            }
+        }
+    ]
+}
\ No newline at end of file

+namespace: Tests
+support_namespace: Support
+# suite config
+suites:
+    api:
+        actor: ApiTester
+        path: .
+        modules:
+            enabled:
+                - REST:
+                    url: http://localhost/api
+                    depends: PhpBrowser
+        step_decorators:
+            - \Codeception\Step\AsJson
+
+paths:
+    tests: tests
+    output: tests/_output
+    data: tests/Support/Data
+    support: tests/Support
+
+settings:
+    shuffle: false
+    lint: true
\ No newline at end of file

@@ -9,14 +9,17 @@
         }
     ],
     "require": {
-        "guzzlehttp/guzzle-services": "^1.1",
-        "guzzlehttp/oauth-subscriber": "^0.3.0",
-        "guzzlehttp/guzzle": "^6.3"
+        "guzzlehttp/guzzle-services": "^1.3",
+        "guzzlehttp/oauth-subscriber": "^0.6.0",
+        "guzzlehttp/guzzle": "^7.4"
     },
     "license": "MIT",
     "autoload": {
         "psr-4": {
             "fehrlich\\ImmoScoutAPI\\": "src/"
         }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.5"
     }
-}
+}
\ No newline at end of file

@@ -127,13 +127,20 @@ abstract class ImmoScoutAPI extends GuzzleClient
      *
      * @return static
      */
-    public static function createClient($key, $secret, $authorized = true)
-    {
+    public static function createClient(
+        $key,
+        $secret,
+        $authorized = true,
+        callable $commandToRequestTransformer = null,
+        callable $responseToResultTransformer = null,
+        HandlerStack $commandHandlerStack = null,
+        array $config = []) {
+
         $token = '';
         $token_secret = '';
         if ($authorized) {
             $tokenArray = static::restoreAccessToken();
-            if($tokenArray && is_array($tokenArray)){
+            if ($tokenArray && is_array($tokenArray)) {
                 $token = $tokenArray[0];
                 $token_secret = $tokenArray[1];
             }
@@ -156,7 +163,13 @@ abstract class ImmoScoutAPI extends GuzzleClient
             'auth' => 'oauth',
         ]);
 
-        $newGuzzleClient = new static($client, new Description([]));
+        $newGuzzleClient = new static(
+            $client, new Description([]),
+            $commandToRequestTransformer,
+            $responseToResultTransformer,
+            $commandHandlerStack,
+            $config
+        );
         $newGuzzleClient->client = $client;
         $newGuzzleClient->oAuth = $oAuth;
         $newGuzzleClient->consumerKey = $key;
@@ -551,7 +564,7 @@ abstract class ImmoScoutAPI extends GuzzleClient
     {
         try {
             return json_decode((string) $res->getBody(), true);
-        } catch (\Exception $ex) {
+        } catch (\Exception$ex) {
             throw new InvalidResponse('invalid json response');
         }
     }
@@ -724,7 +737,7 @@ abstract class ImmoScoutAPI extends GuzzleClient
      *
      * @param string $reId realestate id used by is24     *
      */
-    public function delete($reId)
+    public function deleteRealestate($reId)
     {
         $res = $this->callUserMethod('realestate/' . $reId, 'DELETE');
 

+<?php
+
+use fehrlich\ImmoScoutAPI\ImmoScoutAPI;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\Middleware;
+use GuzzleHttp\Psr7\Request;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+
+class TestScoutAPI extends ImmoScoutAPI
+{
+    public $token;
+    public $secret;
+    protected static $stack = null;
+
+    public static $accessToken;
+    public static $accessSecret;
+
+    public static function setStack($stack)
+    {
+        TestScoutAPI::$stack = $stack;
+    }
+
+    public function saveRequestToken($token, $secret)
+    {
+    }
+    public function restoreRequestToken()
+    {
+        return [
+            "myToken",
+            "mySecret",
+        ];
+    }
+
+    public function saveAccessToken($token, $secret)
+    {
+    }
+    public static function restoreAccessToken()
+    {
+        return [
+            "myAaccessToken",
+            "myAccessSecret",
+        ];
+    }
+
+    // public static function createClient($key,
+    //     $secret,
+    //     $authorized = true,
+    //     callable $commandToRequestTransformer = null,
+    //     callable $responseToResultTransformer = null,
+    //     HandlerStack $commandHandlerStack = null,
+    //     array $config = []) {
+    //     return new Client(['handler' => self::$stack]);
+    // }
+
+}
+
+final class APITest extends TestCase
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $mock = new MockHandler([
+            new Response(200, ['X-Foo' => 'Bar'], 'Hello, World'),
+            new Response(202, ['Content-Length' => 0]),
+            new RequestException('Error Communicating with Server', new Request('GET', 'test')),
+        ]);
+
+        $handlerStack = HandlerStack::create($mock);
+        $container = [];
+        $history = Middleware::history($container);
+        $handlerStack->push($history);
+
+        $this->client = TestScoutAPI::createClient("myKey", "mySecret");
+        $this->client->client = new Client([
+            'base_uri' => "http://localhost",
+            'handler' => $handlerStack,
+            'verify' => false,
+        ]);
+    }
+
+    public function testDefaultDomain()
+    {
+        self::assertEquals($this->client->getDomain(), "sandbox-immobilienscout24.de");
+    }
+
+    public function testSwichingSandbox()
+    {
+        $this->client->useSandbox();
+        self::assertEquals($this->client->getDomain(), "sandbox-immobilienscout24.de");
+        $this->client->dontUseSandbox();
+        self::assertEquals($this->client->getDomain(), "immobilienscout24.de");
+    }
+
+    // public function testSetUser()
+    // {
+    //     $this->client->setUser("test");
+    //     self::assertEquals($this->client->user, "test");
+
+    // }
+    // public function testVerifyApplication()
+    // {
+    //     $this->client->verifyApplication("myUrl");
+    // }
+
+}