wip: guest account registration (self-service and booking create flow)

tests/BusProNet/XmlParser/BookingResponseParserTest.php

@@ -17,6 +17,22 @@ class BookingResponseParserTest extends TestCase
         $this->parser = new BookingResponseParser();
     }
 
+    public function testParseSuccessfulBookingResponse(): void
+    {
+        $xmlContent = '<?xml version="1.0" encoding="utf-8"?>
+<ergebnis>
+    <satz typ="BUCHUNG" />
+    <buchung>erfolgt</buchung>
+    <vorgang>321530</vorgang>
+</ergebnis>';
+
+        $crawler = new Crawler($xmlContent);
+        $response = $this->parser->parse($crawler->filter('ergebnis'));
+
+        self::assertTrue($response->isBookingSuccessful());
+        self::assertSame(321530, $response->bookingNumber);
+    }
+
     public function testParseBookingResponseWithPurchaseVoucher(): void
     {
         $xmlContent = '<?xml version="1.0" encoding="utf-8"?>