validate() public method

public validate ( )
 /**
  * @test
  */
 public function testValidateCertPath()
 {
     $this->setExpectedException('PayPal\\Exception\\PPMissingCredentialException');
     $credCertPath = new PPCertificateCredential("platfo_1255077030_biz_api1.gmail.com", "1255077037", "");
     $credCertPath->validate();
 }