OneLogin_Saml2_Response::getNameIdFormat PHP Method

    public function getNameIdFormat()
    {
        $nameIdFormat = null;
        $nameIdData = $this->getNameIdData();
        if (!empty($nameIdData) && isset($nameIdData['Format'])) {
            $nameIdFormat = $nameIdData['Format'];
        }
        return $nameIdFormat;
    }

 /**
  * Tests the getNameIdFormat method of the OneLogin_Saml2_Response
  *
  * @covers OneLogin_Saml2_Response::getNameIdFormat
  */
 public function testGetNameIdFormat()
 {
     $xml = file_get_contents(TEST_ROOT . '/data/responses/response1.xml.base64');
     $response = new OneLogin_Saml2_Response($this->_settings, $xml);
     $this->assertEquals('urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress', $response->getNameIdFormat());
     $xml2 = file_get_contents(TEST_ROOT . '/data/responses/response_encrypted_nameid.xml.base64');
     $response2 = new OneLogin_Saml2_Response($this->_settings, $xml2);
     $this->assertEquals('urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified', $response2->getNameIdFormat());
     $xml3 = file_get_contents(TEST_ROOT . '/data/responses/valid_encrypted_assertion.xml.base64');
     $response3 = new OneLogin_Saml2_Response($this->_settings, $xml3);
     $this->assertEquals('urn:oasis:names:tc:SAML:2.0:nameid-format:transient', $response3->getNameIdFormat());
     $xml4 = file_get_contents(TEST_ROOT . '/data/responses/invalids/no_nameid.xml.base64');
     $response4 = new OneLogin_Saml2_Response($this->_settings, $xml4);
     try {
         $nameId4 = $response4->getNameIdFormat();
     } catch (Exception $e) {
         $this->assertContains('Not NameID found in the assertion of the Response', $e->getMessage());
     }
 }