Fixed test compatibility with PHPUnit 9

Author: Naktibalda

.github/workflows/main.yml

@@ -24,9 +24,7 @@ jobs:
       run: composer validate
 
     - name: Install dependencies
-      run: |
-        composer require phpunit/phpunit "<=8.5.2" --no-update --ignore-platform-reqs
-        composer install --prefer-dist --no-progress --no-interaction --no-suggest
+      run: composer install --prefer-dist --no-progress --no-interaction --no-suggest
 
     - name: Run test suite
       run: php vendor/bin/codecept run

src/Codeception/Module/SOAP.php

@@ -1,9 +1,7 @@
 <?php
 namespace Codeception\Module;
 
-use Codeception\Lib\Interfaces\API;
 use Codeception\Lib\Interfaces\DependsOnModule;
-use Codeception\Lib\Notification;
 use Codeception\Module as CodeceptionModule;
 use Codeception\TestInterface;
 use Codeception\Exception\ModuleException;

tests/unit/Codeception/Module/SoapTest.php

@@ -37,7 +37,6 @@ public function testXmlIsBuilt()
     {
         $dom = new \DOMDocument();
         $dom->load($this->layout);
-        $this->assertEqualXMLStructure($this->module->xmlRequest->documentElement, $dom->documentElement);
         $this->assertXmlStringEqualsXmlString($dom->saveXML(), $this->module->xmlRequest->saveXML());
     }
 
@@ -50,7 +49,7 @@ public function testBuildHeaders()
         $header->appendChild($dom->createElement('username', 'davert'));
         $header->appendChild($dom->createElement('password', '123456'));
         $dom->documentElement->getElementsByTagName('Header')->item(0)->appendChild($header);
-        $this->assertEqualXMLStructure($this->module->xmlRequest->documentElement, $dom->documentElement);
+        $this->assertXmlStringEqualsXmlString($dom->saveXML(), $this->module->xmlRequest->saveXML());
     }
 
     public function testBuildRequest()
@@ -65,7 +64,7 @@ public function testBuildRequest()
         $request = $dom->createElement('ns:KillHumans');
         $request->appendChild($body);
         $dom->documentElement->getElementsByTagName('Body')->item(0)->appendChild($request);
-        $this->assertEqualXMLStructure($this->module->xmlRequest->documentElement, $dom->documentElement);
+        $this->assertXmlStringEqualsXmlString($dom->saveXML(), $this->module->xmlRequest->saveXML());
     }
 
     public function testBuildRequestWithDomNode()
@@ -80,7 +79,7 @@ public function testBuildRequestWithDomNode()
         $dom->documentElement->getElementsByTagName('Body')->item(0)->appendChild($request);
 
         $this->module->sendSoapRequest('KillHumans', $body);
-        $this->assertEqualXMLStructure($this->module->xmlRequest->documentElement, $dom->documentElement);
+        $this->assertXmlStringEqualsXmlString($dom->saveXML(), $this->module->xmlRequest->saveXML());
     }
 
     public function testSeeXmlIncludes()