OneLogin_Saml2_Response::validateNumAssertions PHP Method

    public function validateNumAssertions()
    {
        $encryptedAssertionNodes = $this->document->getElementsByTagName('EncryptedAssertion');
        $assertionNodes = $this->document->getElementsByTagName('Assertion');
        $valid = $assertionNodes->length + $encryptedAssertionNodes->length == 1;
        if ($this->encrypted) {
            $assertionNodes = $this->decryptedDocument->getElementsByTagName('Assertion');
            $valid = $valid && $assertionNodes->length == 1;
        }
        return $valid;
    }

 /**
  * Tests the validateNumAssertions method of the OneLogin_Saml2_Response
  *
  * @covers OneLogin_Saml2_Response::validateNumAssertions
  */
 public function testValidateNumAssertions()
 {
     $xml = file_get_contents(TEST_ROOT . '/data/responses/response1.xml.base64');
     $response = new OneLogin_Saml2_Response($this->_settings, $xml);
     $this->assertTrue($response->validateNumAssertions());
     $xmlMultiAssertion = file_get_contents(TEST_ROOT . '/data/responses/invalids/multiple_assertions.xml.base64');
     $response2 = new OneLogin_Saml2_Response($this->_settings, $xmlMultiAssertion);
     $this->assertFalse($response2->validateNumAssertions());
 }